{"pageNumber":"1009","pageRowStart":"25200","pageSize":"25","recordCount":40818,"records":[{"id":70028956,"text":"70028956 - 2006 - Seismic evidence for rock damage and healing on the San Andreas fault associated with the 2004 M 6.0 Parkfield earthquake","interactions":[],"lastModifiedDate":"2012-03-12T17:20:58","indexId":"70028956","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1135,"text":"Bulletin of the Seismological Society of America","onlineIssn":"1943-3573","printIssn":"0037-1106","active":true,"publicationSubtype":{"id":10}},"title":"Seismic evidence for rock damage and healing on the San Andreas fault associated with the 2004 M 6.0 Parkfield earthquake","docAbstract":"We deployed a dense linear array of 45 seismometers across and along the San Andreas fault near Parkfield a week after the M 6.0 Parkfield earthquake on 28 September 2004 to record fault-zone seismic waves generated by aftershocks and explosions. Seismic stations and explosions were co-sited with our previous experiment conducted in 2002. The data from repeated shots detonated in the fall of 2002 and 3 months after the 2004 M 6.0 mainshock show ???1.0%-1.5% decreases in seismic-wave velocity within an ???200-m-wide zone along the fault strike and smaller changes (0.2%-0.5%) beyond this zone, most likely due to the coseismic damage of rocks during dynamic rupture in the 2004 M 6.0 earthquake. The width of the damage zone characterized by larger velocity changes is consistent with the low-velocity waveguide model on the San Andreas fault, near Parkfield, that we derived from fault-zone trapped waves (Li et al., 2004). The damage zone is not symmetric but extends farther on the southwest side of the main fault trace. Waveform cross-correlations for repeated aftershocks in 21 clusters, with a total of ???130 events, located at different depths and distances from the array site show ???0.7%-1.1% increases in S-wave velocity within the fault zone in 3 months starting a week after the earthquake. The velocity recovery indicates that the damaged rock has been healing and regaining the strength through rigidity recovery with time, most likely . due to the closure of cracks opened during the mainshock. We estimate that the net decrease in seismic velocities within the fault zone was at least ???2.5%, caused by the 2004 M 6.0 Parkfield earthquake. The healing rate was largest in the earlier stage of the postmainshock healing process. The magnitude of fault healing varies along the rupture zone, being slightly larger for the healing beneath Middle Mountain, correlating well with an area of large mapped slip. The fault healing is most prominent at depths above ???7 km.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Bulletin of the Seismological Society of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1785/0120050803","issn":"00371106","usgsCitation":"Li, Y., Chen, P., Cochran, E., Vidale, J., and Burdette, T., 2006, Seismic evidence for rock damage and healing on the San Andreas fault associated with the 2004 M 6.0 Parkfield earthquake: Bulletin of the Seismological Society of America, v. 96, no. 4 B, https://doi.org/10.1785/0120050803.","costCenters":[],"links":[{"id":209780,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1785/0120050803"},{"id":236490,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"96","issue":"4 B","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8b0fe4b08c986b317564","contributors":{"authors":[{"text":"Li, Y.-G.","contributorId":39141,"corporation":false,"usgs":true,"family":"Li","given":"Y.-G.","affiliations":[],"preferred":false,"id":420711,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Chen, P.","contributorId":12672,"corporation":false,"usgs":true,"family":"Chen","given":"P.","affiliations":[],"preferred":false,"id":420710,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Cochran, E.S.","contributorId":74561,"corporation":false,"usgs":true,"family":"Cochran","given":"E.S.","email":"","affiliations":[],"preferred":false,"id":420714,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Vidale, J.E.","contributorId":55849,"corporation":false,"usgs":true,"family":"Vidale","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":420712,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Burdette, T.","contributorId":62788,"corporation":false,"usgs":true,"family":"Burdette","given":"T.","email":"","affiliations":[],"preferred":false,"id":420713,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70030924,"text":"70030924 - 2006 - Quaternary tectonic faulting in the Eastern United States","interactions":[],"lastModifiedDate":"2012-03-12T17:21:16","indexId":"70030924","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1517,"text":"Engineering Geology","active":true,"publicationSubtype":{"id":10}},"title":"Quaternary tectonic faulting in the Eastern United States","docAbstract":"Paleoseismological study of geologic features thought to result from Quaternary tectonic faulting can characterize the frequencies and sizes of large prehistoric and historical earthquakes, thereby improving the accuracy and precision of seismic-hazard assessments. Greater accuracy and precision can reduce the likelihood of both underprotection and unnecessary design and construction costs. Published studies proposed Quaternary tectonic faulting at 31 faults, folds, seismic zones, and fields of earthquake-induced liquefaction phenomena in the Appalachian Mountains and Coastal Plain. Of the 31 features, seven are of known origin. Four of the seven have nontectonic origins and the other three features are liquefaction fields caused by moderate to large historical and Holocene earthquakes in coastal South Carolina, including Charleston; the Central Virginia Seismic Zone; and the Newbury, Massachusetts, area. However, the causal faults of the three liquefaction fields remain unclear. Charleston has the highest hazard because of large Holocene earthquakes in that area, but the hazard is highly uncertain because the earthquakes are uncertainly located. Of the 31 features, the remaining 24 are of uncertain origin. They require additional work before they can be clearly attributed either to Quaternary tectonic faulting or to nontectonic causes. Of these 24, 14 features, most of them faults, have little or no published geologic evidence of Quaternary tectonic faulting that could indicate the likely occurrence of earthquakes larger than those observed historically. Three more features of the 24 were suggested to have had Quaternary tectonic faulting, but paleoseismological and other studies of them found no evidence of large prehistoric earthquakes. The final seven features of uncertain origin require further examination because all seven are in or near urban areas. They are the Moodus Seismic Zone (Hartford, Connecticut), Dobbs Ferry fault zone and Mosholu fault (New York City), Lancaster Seismic Zone and the epicenter of the shallow Cacoosing Valley earthquake (Lancaster and Reading, Pennsylvania), Kingston fault (central New Jersey between New York and Philadelphia), and Everona fault-Mountain Run fault zone (Washington, D.C., and Arlington and Alexandria, Virginia). ?? 2005 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Engineering Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.enggeo.2005.10.005","issn":"00137952","usgsCitation":"Wheeler, R.L., 2006, Quaternary tectonic faulting in the Eastern United States: Engineering Geology, v. 82, no. 3, p. 165-186, https://doi.org/10.1016/j.enggeo.2005.10.005.","startPage":"165","endPage":"186","numberOfPages":"22","costCenters":[],"links":[{"id":238566,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211297,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.enggeo.2005.10.005"}],"volume":"82","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a92e5e4b0c8380cd80ae9","contributors":{"authors":[{"text":"Wheeler, R. L.","contributorId":34916,"corporation":false,"usgs":true,"family":"Wheeler","given":"R.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":429250,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70031151,"text":"70031151 - 2006 - Geochemistry and source waters of rock glacier outflow, Colorado Front Range","interactions":[],"lastModifiedDate":"2012-03-12T17:21:01","indexId":"70031151","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3032,"text":"Permafrost and Periglacial Processes","active":true,"publicationSubtype":{"id":10}},"title":"Geochemistry and source waters of rock glacier outflow, Colorado Front Range","docAbstract":"We characterize the seasonal variation in the geochemical and isotopic content of the outflow of the Green Lake 5 rock glacier (RG5), located in the Green Lakes Valley of the Colorado Front Range, USA. Between June and August, the geochemical content of rock glacier outflow does not appear to differ substantially from that of other surface waters in the Green Lakes Valley. Thus, for this alpine ecosystem at this time of year there does not appear to be large differences in water quality among rock glacier outflow, glacier and blockslope discharge, and discharge from small alpine catchments. However, in September concentrations of Mg2+ in the outflow of the rock glacier increased to more than 900 ??eq L-1 compared to values of less than 40 ??eq L-1 at all the other sites, concentrations of Ca2+ were greater than 4,000 ??eq L-1 compared to maximum values of less than 200 ??eq L-1 at all other sites, and concentrations of SO42- reached 7,000 ??eq L-1, compared to maximum concentrations below 120 ??eq L-1 at the other sites. Inverse geochemical modelling suggests that dissolution of pyrite, epidote, chlorite and minor calcite as well as the precipitation of silica and goethite best explain these elevated concentrations of solutes in the outflow of the rock glacier. Three component hydrograph separation using end-member mixing analysis shows that melted snow comprised an average of 30% of RG5 outflow, soil water 32%, and base flow 38%. Snow was the dominant source water in June, soil water was the dominant water source in July, and base flow was the dominant source in September. Enrichment of ?? 18O from - 10??? in the outflow of the rock glacier compared to -20??? in snow and enrichment of deuterium excess from +17.5??? in rock glacier outflow compared to +11??? in snow, suggests that melt of internal ice that had undergone multiple melt/freeze episodes was the dominant source of base flow. Copyright ?? 2005 John Wiley & Sons, Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Permafrost and Periglacial Processes","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/ppp.535","issn":"10456740","usgsCitation":"Williams, M., Knauf, M., Caine, N., Liu, F., and Verplanck, P., 2006, Geochemistry and source waters of rock glacier outflow, Colorado Front Range: Permafrost and Periglacial Processes, v. 17, no. 1, p. 13-33, https://doi.org/10.1002/ppp.535.","startPage":"13","endPage":"33","numberOfPages":"21","costCenters":[],"links":[{"id":238980,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211652,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/ppp.535"}],"volume":"17","issue":"1","noUsgsAuthors":false,"publicationDate":"2005-12-30","publicationStatus":"PW","scienceBaseUri":"505a16e0e4b0c8380cd552c9","contributors":{"authors":[{"text":"Williams, M.W.","contributorId":15565,"corporation":false,"usgs":true,"family":"Williams","given":"M.W.","email":"","affiliations":[],"preferred":false,"id":430268,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Knauf, M.","contributorId":77360,"corporation":false,"usgs":true,"family":"Knauf","given":"M.","email":"","affiliations":[],"preferred":false,"id":430270,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Caine, N.","contributorId":34881,"corporation":false,"usgs":true,"family":"Caine","given":"N.","email":"","affiliations":[],"preferred":false,"id":430269,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Liu, F.","contributorId":14150,"corporation":false,"usgs":true,"family":"Liu","given":"F.","email":"","affiliations":[],"preferred":false,"id":430267,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Verplanck, P. L. 0000-0002-3653-6419","orcid":"https://orcid.org/0000-0002-3653-6419","contributorId":106565,"corporation":false,"usgs":true,"family":"Verplanck","given":"P. L.","affiliations":[],"preferred":false,"id":430271,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70030416,"text":"70030416 - 2006 - Population momentum: Implications for wildlife management","interactions":[],"lastModifiedDate":"2012-03-12T17:21:03","indexId":"70030416","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Population momentum: Implications for wildlife management","docAbstract":"Maintenance of sustainable wildlife populations is one of the primary purposes of wildlife management. Thus, it is important to monitor and manage population growth over time. Sensitivity analysis of the long-term (i.e., asymptotic) population growth rate to changes in the vital rates is commonly used in management to identify the vital rates that contribute most to population growth. Yet, dynamics associated with the long-term population growth rate only pertain to the special case when there is a stable age (or stage) distribution of individuals in the population. Frequently, this assumption is necessary because age structure is rarely estimated. However, management actions can greatly affect the age distribution of a population. For initially growing and declining populations, we instituted hypothetical management targeted at halting the growth or decline of the population, and measured the effects of a changing age structure on the population dynamics. When we changed vital rates, the age structure became unstable and population momentum caused populations to grow differently than that predicted by the long-term population growth rate. Interestingly, changes in fertility actually reversed the direction of short-term population growth, leading to long-term population sizes that were actually smaller or larger than that when fertility was changed. Population momentum can significantly affect population dynamics and will be an important factor in the use of population models for management.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Wildlife Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2193/0022-541X(2006)70[19:PMIFWM]2.0.CO;2","issn":"0022541X","usgsCitation":"Koons, D.N., Rockwell, R., and Grand, J., 2006, Population momentum: Implications for wildlife management: Journal of Wildlife Management, v. 70, no. 1, p. 19-26, https://doi.org/10.2193/0022-541X(2006)70[19:PMIFWM]2.0.CO;2.","startPage":"19","endPage":"26","numberOfPages":"8","costCenters":[],"links":[{"id":211863,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2193/0022-541X(2006)70[19:PMIFWM]2.0.CO;2"},{"id":239235,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"70","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a7d83e4b0c8380cd79fc1","contributors":{"authors":[{"text":"Koons, D. N.","contributorId":68093,"corporation":false,"usgs":false,"family":"Koons","given":"D.","email":"","middleInitial":"N.","affiliations":[],"preferred":false,"id":427065,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rockwell, R.F.","contributorId":22527,"corporation":false,"usgs":true,"family":"Rockwell","given":"R.F.","email":"","affiliations":[],"preferred":false,"id":427064,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Grand, J.B.","contributorId":11150,"corporation":false,"usgs":true,"family":"Grand","given":"J.B.","email":"","affiliations":[],"preferred":false,"id":427063,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030629,"text":"70030629 - 2006 - Research article: Watershed management councils and scientific models: Using diffusion literature to explain adoption","interactions":[],"lastModifiedDate":"2012-03-12T17:21:00","indexId":"70030629","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1559,"text":"Environmental Practice","active":true,"publicationSubtype":{"id":10}},"title":"Research article: Watershed management councils and scientific models: Using diffusion literature to explain adoption","docAbstract":"Recent literature on the diffusion of innovations concentrates either specifically on public adoption of policy, where social or environmental conditions are the dependent variables for adoption, or on private adoption of an innovation, where emphasis is placed on the characteristics of the innovation itself. This article uses both the policy diffusion literature and the diffusion of innovation literature to assess watershed management councils' decisions to adopt, or not adopt, scientific models. Watershed management councils are a relevant case study because they possess both public and private attributes. We report on a survey of councils in the United States that was conducted to determine the criteria used when selecting scientific models for studying watershed conditions. We found that specific variables from each body of literature play a role in explaining the choice to adopt scientific models by these quasi-public organizations. The diffusion of innovation literature contributes to an understanding of how organizations select models by confirming the importance of a model's ability to provide better data. Variables from the policy diffusion literature showed that watershed management councils that employ consultants are more likely to use scientific models. We found a gap between those who create scientific models and those who use these models. We recommend shrinking this gap through more communication between these actors and advancing the need for developers to provide more technical assistance.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Practice","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1017/S1466046606060212","issn":"14660466","usgsCitation":"King, M., Burkardt, N., and Clark, B.T., 2006, Research article: Watershed management councils and scientific models: Using diffusion literature to explain adoption: Environmental Practice, v. 8, no. 2, p. 125-134, https://doi.org/10.1017/S1466046606060212.","startPage":"125","endPage":"134","numberOfPages":"10","costCenters":[],"links":[{"id":211876,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1017/S1466046606060212"},{"id":239249,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"8","issue":"2","noUsgsAuthors":false,"publicationDate":"2017-03-27","publicationStatus":"PW","scienceBaseUri":"505aa91ce4b0c8380cd85c17","contributors":{"authors":[{"text":"King, M.D.","contributorId":28211,"corporation":false,"usgs":true,"family":"King","given":"M.D.","email":"","affiliations":[],"preferred":false,"id":427938,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Burkardt, N.","contributorId":13913,"corporation":false,"usgs":true,"family":"Burkardt","given":"N.","affiliations":[],"preferred":false,"id":427937,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Clark, B. T.","contributorId":108070,"corporation":false,"usgs":true,"family":"Clark","given":"B.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":427939,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030623,"text":"70030623 - 2006 - Inverse approaches with lithologic information for a regional groundwater system in southwest Kansas","interactions":[],"lastModifiedDate":"2012-03-12T17:21:05","indexId":"70030623","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2342,"text":"Journal of Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Inverse approaches with lithologic information for a regional groundwater system in southwest Kansas","docAbstract":"Two practical approaches incorporating lithologic information for groundwater modeling calibration are presented to estimate distributed, cell-based hydraulic conductivity. The first approach is to estimate optimal hydraulic conductivities for geological materials by incorporating thickness distribution of materials into inverse modeling. In the second approach, residuals for the groundwater model solution are minimized according to a globalized Newton method with the aid of a Geographic Information System (GIS) to calculate a cell-wise distribution of hydraulic conductivity. Both approaches honor geologic data and were effective in characterizing the heterogeneity of a regional groundwater modeling system in southwest Kansas. ?? 2005 Elsevier Ltd All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Hydrology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.jhydrol.2005.06.027","issn":"00221694","usgsCitation":"Tsou, M., Perkins, S., Zhan, X., Whittemore, D.O., and Zheng, L., 2006, Inverse approaches with lithologic information for a regional groundwater system in southwest Kansas: Journal of Hydrology, v. 318, no. 1-4, p. 292-300, https://doi.org/10.1016/j.jhydrol.2005.06.027.","startPage":"292","endPage":"300","numberOfPages":"9","costCenters":[],"links":[{"id":211792,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jhydrol.2005.06.027"},{"id":239147,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"318","issue":"1-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3e4ae4b0c8380cd63c58","contributors":{"authors":[{"text":"Tsou, Ming-shu","contributorId":20507,"corporation":false,"usgs":false,"family":"Tsou","given":"Ming-shu","email":"","affiliations":[],"preferred":false,"id":427913,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Perkins, S.P.","contributorId":12211,"corporation":false,"usgs":true,"family":"Perkins","given":"S.P.","email":"","affiliations":[],"preferred":false,"id":427912,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zhan, X.","contributorId":26477,"corporation":false,"usgs":true,"family":"Zhan","given":"X.","email":"","affiliations":[],"preferred":false,"id":427914,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Whittemore, Donald O.","contributorId":28748,"corporation":false,"usgs":false,"family":"Whittemore","given":"Donald","email":"","middleInitial":"O.","affiliations":[],"preferred":false,"id":427915,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Zheng, Lingyun","contributorId":68495,"corporation":false,"usgs":true,"family":"Zheng","given":"Lingyun","email":"","affiliations":[],"preferred":false,"id":427916,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70030622,"text":"70030622 - 2006 - Studying toxicity","interactions":[],"lastModifiedDate":"2012-03-12T17:21:05","indexId":"70030622","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2091,"text":"International Water Power and Dam Construction","active":true,"publicationSubtype":{"id":10}},"title":"Studying toxicity","docAbstract":"With funding from the George Mitchell Center for the Environment at the University of Maine, a team of scientists used a simple laboratory-based sediment resuspension design, and two well-established aquatic toxicology models, fathead minnows (Pimephales promelas) and zebrafish (Danio rerio), to evaluate if resuspension of Penobscot river sediment significantly elevates the toxicity of river water and to provide preliminary information on the types of chemicals likely to desorb during resuspension. The group collected sediments from two sites with known chemical contamination downstream of the Great Works and Veazie dams. The sediments were examined to determine the dynamics of PAH desorption and degradation under different resuspension frequencies. The scientists used clarified water from resuspension experiments for toxicity tests with the water-flea Ceriodaphnia dubia, and other aquatic test organisms to infer toxicity from sediments from northern California rivers. Data from the study will help ascertain whether metals and/or xenoestrogens are present in the desorption water and give insight into possible avenues of sediment remediation.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"International Water Power and Dam Construction","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"0306400X","usgsCitation":"Elkus, A., LeBlanc, L., Kim, C., Van Beneden, R., and Mayer, G., 2006, Studying toxicity: International Water Power and Dam Construction, v. 58, no. 3, p. 30-32.","startPage":"30","endPage":"32","numberOfPages":"3","costCenters":[],"links":[{"id":239112,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"58","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9cece4b08c986b31d523","contributors":{"authors":[{"text":"Elkus, A.","contributorId":49978,"corporation":false,"usgs":true,"family":"Elkus","given":"A.","email":"","affiliations":[],"preferred":false,"id":427908,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"LeBlanc, L.","contributorId":76940,"corporation":false,"usgs":true,"family":"LeBlanc","given":"L.","email":"","affiliations":[],"preferred":false,"id":427909,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kim, C.","contributorId":90108,"corporation":false,"usgs":true,"family":"Kim","given":"C.","email":"","affiliations":[],"preferred":false,"id":427910,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Van Beneden, R.","contributorId":98540,"corporation":false,"usgs":true,"family":"Van Beneden","given":"R.","affiliations":[],"preferred":false,"id":427911,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Mayer, G.","contributorId":10997,"corporation":false,"usgs":true,"family":"Mayer","given":"G.","email":"","affiliations":[],"preferred":false,"id":427907,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70030620,"text":"70030620 - 2006 - Long-period effects of the Denali earthquake on water bodies in the Puget Lowland: Observations and modeling","interactions":[],"lastModifiedDate":"2012-03-12T17:21:05","indexId":"70030620","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1135,"text":"Bulletin of the Seismological Society of America","onlineIssn":"1943-3573","printIssn":"0037-1106","active":true,"publicationSubtype":{"id":10}},"title":"Long-period effects of the Denali earthquake on water bodies in the Puget Lowland: Observations and modeling","docAbstract":"Analysis of strong-motion instrument recordings in Seattle, Washington, resulting from the 2002 Mw 7.9 Denali, Alaska, earthquake reveals that amplification in the 0.2-to 1.0-Hz frequency band is largely governed by the shallow sediments both inside and outside the sedimentary basins beneath the Puget Lowland. Sites above the deep sedimentary strata show additional seismic-wave amplification in the 0.04- to 0.2-Hz frequency range. Surface waves generated by the Mw 7.9 Denali, Alaska, earthquake of 3 November 2002 produced pronounced water waves across Washington state. The largest water waves coincided with the area of largest seismic-wave amplification underlain by the Seattle basin. In the current work, we present reports that show Lakes Union and Washington, both located on the Seattle basin, are susceptible to large water waves generated by large local earthquakes and teleseisms. A simple model of a water body is adopted to explain the generation of waves in water basins. This model provides reasonable estimates for the water-wave amplitudes in swimming pools during the Denali earthquake but appears to underestimate the waves observed in Lake Union.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Bulletin of the Seismological Society of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1785/0120050090","issn":"00371106","usgsCitation":"Barberopoulou, A., Qamar, A., Pratt, T.L., and Steele, W.P., 2006, Long-period effects of the Denali earthquake on water bodies in the Puget Lowland: Observations and modeling: Bulletin of the Seismological Society of America, v. 96, no. 2, p. 519-535, https://doi.org/10.1785/0120050090.","startPage":"519","endPage":"535","numberOfPages":"17","costCenters":[],"links":[{"id":211730,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1785/0120050090"},{"id":239077,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"96","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a496de4b0c8380cd685c9","contributors":{"authors":[{"text":"Barberopoulou, A.","contributorId":45507,"corporation":false,"usgs":true,"family":"Barberopoulou","given":"A.","affiliations":[],"preferred":false,"id":427891,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Qamar, A. 0000-0003-3131-3141","orcid":"https://orcid.org/0000-0003-3131-3141","contributorId":50347,"corporation":false,"usgs":true,"family":"Qamar","given":"A.","email":"","affiliations":[],"preferred":false,"id":427892,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Pratt, T. L.","contributorId":53072,"corporation":false,"usgs":true,"family":"Pratt","given":"T.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":427893,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Steele, W. P.","contributorId":101445,"corporation":false,"usgs":true,"family":"Steele","given":"W.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":427894,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70030612,"text":"70030612 - 2006 - Crater gradation in Gusev crater and Meridiani Planum, Mars","interactions":[],"lastModifiedDate":"2012-03-12T17:21:14","indexId":"70030612","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2317,"text":"Journal of Geophysical Research E: Planets","active":true,"publicationSubtype":{"id":10}},"title":"Crater gradation in Gusev crater and Meridiani Planum, Mars","docAbstract":"The Mars Exploration Rovers investigated numerous craters in Gusev crater and Meridiani Planum during the first ???400 sols of their missions. Craters vary in size and preservation state but are mostly due to secondary impacts at Gusev and primary impacts at Meridiani. Craters at both locations are modified primarily by eolian erosion and infilling and lack evidence for modification by aqueous processes. Effects of gradation on crater form are dependent on size, local lithology, slopes, and availability of mobile sediments. At Gusev, impacts into basaltic rubble create shallow craters and ejecta composed of resistant rocks. Ejecta initially experience eolian stripping, which becomes weathering-limited as lags develop on ejecta surfaces and sediments are trapped within craters. Subsequent eolian gradation depends on the slow production of fines by weathering and impacts and is accompanied by minor mass wasting. At Meridiani the sulfate-rich bedrock is more susceptible to eolian erosion, and exposed crater rims, walls, and ejecta are eroded, while lower interiors and low-relief surfaces are increasingly infilled and buried by mostly basaltic sediments. Eolian processes outpace early mass wasting, often produce meters of erosion, and mantle some surfaces. Some small craters were likely completely eroded/buried. Craters >100 m in diameter on the Hesperian-aged floor of Gusev are generally more pristine than on the Amazonian-aged Meridiani plains. This conclusion contradicts interpretations from orbital views, which do not readily distinguish crater gradation state at Meridiani and reveal apparently subdued crater forms at Gusev that may suggest more gradation than has occurred. Copyright 2006 by the American Geophysical Union.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geophysical Research E: Planets","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2005JE002465","issn":"01480227","usgsCitation":"Grant, J.A., Arvidson, R., Crumpler, L., Golombek, M., Hahn, B., Haldemann, A.F., Li, R., Soderblom, L., Squyres, S.W., Wright, S., and Watters, W., 2006, Crater gradation in Gusev crater and Meridiani Planum, Mars: Journal of Geophysical Research E: Planets, v. 111, no. 2, https://doi.org/10.1029/2005JE002465.","costCenters":[],"links":[{"id":486920,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2005je002465","text":"Publisher Index Page"},{"id":212105,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2005JE002465"},{"id":239528,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"111","issue":"2","noUsgsAuthors":false,"publicationDate":"2006-01-06","publicationStatus":"PW","scienceBaseUri":"5059fc9ae4b0c8380cd4e338","contributors":{"authors":[{"text":"Grant, J. A.","contributorId":28334,"corporation":false,"usgs":true,"family":"Grant","given":"J.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":427862,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Arvidson, R. E.","contributorId":46666,"corporation":false,"usgs":true,"family":"Arvidson","given":"R. E.","affiliations":[],"preferred":false,"id":427865,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Crumpler, L.S.","contributorId":81575,"corporation":false,"usgs":true,"family":"Crumpler","given":"L.S.","email":"","affiliations":[],"preferred":false,"id":427868,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Golombek, M.P.","contributorId":52696,"corporation":false,"usgs":true,"family":"Golombek","given":"M.P.","email":"","affiliations":[],"preferred":false,"id":427866,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Hahn, B.","contributorId":14633,"corporation":false,"usgs":true,"family":"Hahn","given":"B.","email":"","affiliations":[],"preferred":false,"id":427861,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Haldemann, A. F. C.","contributorId":33437,"corporation":false,"usgs":false,"family":"Haldemann","given":"A.","email":"","middleInitial":"F. C.","affiliations":[],"preferred":false,"id":427864,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Li, R.","contributorId":68441,"corporation":false,"usgs":true,"family":"Li","given":"R.","affiliations":[],"preferred":false,"id":427867,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Soderblom, L.A. 0000-0002-0917-853X","orcid":"https://orcid.org/0000-0002-0917-853X","contributorId":6139,"corporation":false,"usgs":true,"family":"Soderblom","given":"L.A.","affiliations":[],"preferred":false,"id":427859,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Squyres, S. W.","contributorId":31836,"corporation":false,"usgs":true,"family":"Squyres","given":"S.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":427863,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Wright, S.P.","contributorId":14622,"corporation":false,"usgs":true,"family":"Wright","given":"S.P.","email":"","affiliations":[],"preferred":false,"id":427860,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Watters, W.A.","contributorId":86542,"corporation":false,"usgs":true,"family":"Watters","given":"W.A.","email":"","affiliations":[],"preferred":false,"id":427869,"contributorType":{"id":1,"text":"Authors"},"rank":11}]}}
,{"id":70030611,"text":"70030611 - 2006 - Spirit rover localization and topographic mapping at the landing site of Gusev crater, Mars","interactions":[],"lastModifiedDate":"2018-12-07T17:06:21","indexId":"70030611","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2317,"text":"Journal of Geophysical Research E: Planets","active":true,"publicationSubtype":{"id":10}},"title":"Spirit rover localization and topographic mapping at the landing site of Gusev crater, Mars","docAbstract":"<p>By sol 440, the Spirit rover has traversed a distance of 3.76 km (actual distance traveled instead of odometry). Localization of the lander and the rover along the traverse has been successfully performed at the Gusev crater landing site. We localized the lander in the Gusev crater using two-way Doppler radio positioning and cartographic triangulations through landmarks visible in both orbital and ground images. Additional high-resolution orbital images were used to verify the determined lander position. Visual odometry and bundle adjustment technologies were applied to compensate for wheel slippage, azimuthal angle drift, and other navigation errors (which were as large as 10.5% in the Husband Hill area). We generated topographic products, including 72 ortho maps and three-dimensional (3-D) digital terrain models, 11 horizontal and vertical traverse profiles, and one 3-D crater model (up to sol 440). Also discussed in this paper are uses of the data for science operations planning, geological traverse surveys, surveys of wind-related features, and other science applications.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geophysical Research E: Planets","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"American Geophysical Union","publisherLocation":"Washington, D.C.","doi":"10.1029/2005JE002483","issn":"01480227","usgsCitation":"Li, R., Archinal, B.A., Arvidson, R.E., Bell, J., Christensen, P.R., Crumpler, L.S., Des Marais, D.J., Di, K., Duxbury, T., Golombek, M., Grant, J., Greeley, R., Guinn, J., Johnson, A.H., Kirk, R.L., Maimone, M., Matthies, L.H., Malin, M., Parker, T., Sims, M.H., Thompson, S.D., Squyres, S.W., and Soderblom, L.A., 2006, Spirit rover localization and topographic mapping at the landing site of Gusev crater, Mars: Journal of Geophysical Research E: Planets, v. 111, no. E2, 13 p., https://doi.org/10.1029/2005JE002483.","productDescription":"13 p.","costCenters":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"links":[{"id":477636,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2005je002483","text":"Publisher Index Page"},{"id":239495,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"otherGeospatial":"Gusev crater; Mars","volume":"111","issue":"E2","noUsgsAuthors":false,"publicationDate":"2006-01-12","publicationStatus":"PW","scienceBaseUri":"505b9600e4b08c986b31b23d","contributors":{"authors":[{"text":"Li, Rongxing","contributorId":211216,"corporation":false,"usgs":false,"family":"Li","given":"Rongxing","email":"","affiliations":[],"preferred":false,"id":427851,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Archinal, Brent A. 0000-0002-6654-0742 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Michael","contributorId":88112,"corporation":false,"usgs":true,"family":"Malin","given":"Michael","affiliations":[],"preferred":false,"id":427838,"contributorType":{"id":1,"text":"Authors"},"rank":18},{"text":"Parker, Timothy","contributorId":88791,"corporation":false,"usgs":true,"family":"Parker","given":"Timothy","affiliations":[],"preferred":false,"id":427855,"contributorType":{"id":1,"text":"Authors"},"rank":19},{"text":"Sims, Michael H.","contributorId":210519,"corporation":false,"usgs":false,"family":"Sims","given":"Michael","email":"","middleInitial":"H.","affiliations":[{"id":24796,"text":"NASA Ames Research Center","active":true,"usgs":false}],"preferred":false,"id":427847,"contributorType":{"id":1,"text":"Authors"},"rank":20},{"text":"Thompson, Shane D.","contributorId":22079,"corporation":false,"usgs":true,"family":"Thompson","given":"Shane","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":427852,"contributorType":{"id":1,"text":"Authors"},"rank":21},{"text":"Squyres, Steven W.","contributorId":10537,"corporation":false,"usgs":true,"family":"Squyres","given":"Steven","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":427843,"contributorType":{"id":1,"text":"Authors"},"rank":22},{"text":"Soderblom, Laurence A. 0000-0002-0917-853X lsoderblom@usgs.gov","orcid":"https://orcid.org/0000-0002-0917-853X","contributorId":2721,"corporation":false,"usgs":true,"family":"Soderblom","given":"Laurence","email":"lsoderblom@usgs.gov","middleInitial":"A.","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":427836,"contributorType":{"id":1,"text":"Authors"},"rank":23}]}}
,{"id":70030608,"text":"70030608 - 2006 - Evaluation of kinetic uncertainty in numerical models of petroleum generation","interactions":[],"lastModifiedDate":"2012-03-12T17:21:04","indexId":"70030608","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":701,"text":"American Association of Petroleum Geologists Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Evaluation of kinetic uncertainty in numerical models of petroleum generation","docAbstract":"Oil-prone marine petroleum source rocks contain type I or type II kerogen having Rock-Eval pyrolysis hydrogen indices greater than 600 or 300-600 mg hydrocarbon/g total organic carbon (HI, mg HC/g TOC), respectively. Samples from 29 marine source rocks worldwide that contain mainly type II kerogen (HI = 230-786 mg HC/g TOC) were subjected to open-system programmed pyrolysis to determine the activation energy distributions for petroleum generation. Assuming a burial heating rate of 1??C/m.y. for each measured activation energy distribution, the calculated average temperature for 50% fractional conversion of the kerogen in the samples to petroleum is approximately 136 ?? 7??C, but the range spans about 30??C (???121-151??C). Fifty-two outcrop samples of thermally immature Jurassic Oxford Clay Formation were collected from five locations in the United Kingdom to determine the variations of kinetic response for one source rock unit. The samples contain mainly type I or type II kerogens (HI = 230-774 mg HC/g TOC). At a heating rate of 1??C/m.y., the calculated temperatures for 50% fractional conversion of the Oxford Clay kerogens to petroleum differ by as much as 23??C (127-150??C). The data indicate that kerogen type, as defined by hydrogen index, is not systematically linked to kinetic response, and that default kinetics for the thermal decomposition of type I or type II kerogen can introduce unacceptable errors into numerical simulations. Furthermore, custom kinetics based on one or a few samples may be inadequate to account for variations in organofacies within a source rock. We propose three methods to evaluate the uncertainty contributed by kerogen kinetics to numerical simulations: (1) use the average kinetic distribution for multiple samples of source rock and the standard deviation for each activation energy in that distribution; (2) use source rock kinetics determined at several locations to describe different parts of the study area; and (3) use a weighted-average method that combines kinetics for samples from different locations in the source rock unit by giving the activation energy distribution for each sample a weight proportional to its Rock-Eval pyrolysis S2 yield (hydrocarbons generated by pyrolytic degradation of organic matter). Copyright ?? 2006. The American Association of Petroleum Geologists. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"American Association of Petroleum Geologists Bulletin","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1306/10140505122","issn":"01491423","usgsCitation":"Peters, K.E., Walters, C., and Mankiewicz, P., 2006, Evaluation of kinetic uncertainty in numerical models of petroleum generation: American Association of Petroleum Geologists Bulletin, v. 90, no. 3, p. 387-403, https://doi.org/10.1306/10140505122.","startPage":"387","endPage":"403","numberOfPages":"17","costCenters":[],"links":[{"id":212051,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1306/10140505122"},{"id":239460,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"90","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0c8de4b0c8380cd52bc4","contributors":{"authors":[{"text":"Peters, K. E.","contributorId":17295,"corporation":false,"usgs":true,"family":"Peters","given":"K.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":427829,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Walters, C.C.","contributorId":102613,"corporation":false,"usgs":true,"family":"Walters","given":"C.C.","email":"","affiliations":[],"preferred":false,"id":427831,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mankiewicz, P.J.","contributorId":37956,"corporation":false,"usgs":true,"family":"Mankiewicz","given":"P.J.","email":"","affiliations":[],"preferred":false,"id":427830,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030606,"text":"70030606 - 2006 - Estimating crustal heterogeneity from double-difference tomography","interactions":[],"lastModifiedDate":"2012-03-12T17:21:05","indexId":"70030606","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3208,"text":"Pure and Applied Geophysics","active":true,"publicationSubtype":{"id":10}},"title":"Estimating crustal heterogeneity from double-difference tomography","docAbstract":"Seismic velocity parameters in limited, but heterogeneous volumes can be inferred using a double-difference tomographic algorithm, but to obtain meaningful results accuracy must be maintained at every step of the computation. MONTEILLER et al. (2005) have devised a double-difference tomographic algorithm that takes full advantage of the accuracy of cross-spectral time-delays of large correlated event sets. This algorithm performs an accurate computation of theoretical travel-time delays in heterogeneous media and applies a suitable inversion scheme based on optimization theory. When applied to Kilauea Volcano, in Hawaii, the double-difference tomography approach shows significant and coherent changes to the velocity model in the well-resolved volumes beneath the Kilauea caldera and the upper east rift. In this paper, we first compare the results obtained using MONTEILLER et al.'s algorithm with those obtained using the classic travel-time tomographic approach. Then, we evaluated the effect of using data series of different accuracies, such as handpicked arrival-time differences (\"picking differences\"), on the results produced by double-difference tomographic algorithms. We show that picking differences have a non-Gaussian probability density function (pdf). Using a hyperbolic secant pdf instead of a Gaussian pdf allows improvement of the double-difference tomographic result when using picking difference data. We completed our study by investigating the use of spatially discontinuous time-delay data. ?? Birkha??user Verlag, Basel, 2006.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Pure and Applied Geophysics","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s00024-005-0022-x","issn":"00334553","usgsCitation":"Got, J., Monteiller, V., Virieux, J., and Okubo, P., 2006, Estimating crustal heterogeneity from double-difference tomography: Pure and Applied Geophysics, v. 163, no. 2-3, p. 405-430, https://doi.org/10.1007/s00024-005-0022-x.","startPage":"405","endPage":"430","numberOfPages":"26","costCenters":[],"links":[{"id":212021,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s00024-005-0022-x"},{"id":239424,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"163","issue":"2-3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0b13e4b0c8380cd52560","contributors":{"authors":[{"text":"Got, J.-L.","contributorId":80867,"corporation":false,"usgs":true,"family":"Got","given":"J.-L.","email":"","affiliations":[],"preferred":false,"id":427825,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Monteiller, V.","contributorId":62409,"corporation":false,"usgs":true,"family":"Monteiller","given":"V.","email":"","affiliations":[],"preferred":false,"id":427824,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Virieux, J.","contributorId":10617,"corporation":false,"usgs":true,"family":"Virieux","given":"J.","email":"","affiliations":[],"preferred":false,"id":427822,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Okubo, P. 0000-0002-0381-6051","orcid":"https://orcid.org/0000-0002-0381-6051","contributorId":49432,"corporation":false,"usgs":true,"family":"Okubo","given":"P.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":false,"id":427823,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70030604,"text":"70030604 - 2006 - Inflation model of Uzon caldera, Kamchatka, constrained by satellite radar interferometry observations","interactions":[],"lastModifiedDate":"2019-04-08T11:18:09","indexId":"70030604","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1807,"text":"Geophysical Research Letters","active":true,"publicationSubtype":{"id":10}},"title":"Inflation model of Uzon caldera, Kamchatka, constrained by satellite radar interferometry observations","docAbstract":"<p>We analyzed RADARSAT-1 synthetic aperture radar (SAR) data to compute interferometric SAR (InSAR) images of surface deformation at Uzon caldera, Kamchatka, Russia. From 2000 to 2003 approximately 0.15 m of inflation occurred at Uzon caldera, extending beneath adjacent Kikhpinych volcano. This contrasts with InSAR data showing no significant deformation during either the 1999 to 2000, or 2003 to 2004, time periods. We performed three sets of numerical source inversions to fit InSAR data from three different swaths spanning 2000 to 2003. The preferred source model is an irregularly shaped, pressurized crack, dipping ∼20° to the NW, 4 km below the surface. The geometry of this solution is similar to the upper boundary of the geologically inferred magma chamber. Extension of the surface deformation and source to adjacent Kikhpinych volcano, without an eruption, suggests that the deformation is more likely of hydrothermal origin, possibly driven by recharge of the magma chamber.</p>","language":"English","publisher":"American Geophysical Union.","doi":"10.1029/2005GL025181","issn":"00948276","usgsCitation":"Lundgren, P., and Lu, Z., 2006, Inflation model of Uzon caldera, Kamchatka, constrained by satellite radar interferometry observations: Geophysical Research Letters, v. 33, no. 6, L06301; 4 p., https://doi.org/10.1029/2005GL025181.","productDescription":"L06301; 4 p.","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true},{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true}],"links":[{"id":477399,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2005gl025181","text":"Publisher Index Page"},{"id":239422,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Russia","otherGeospatial":"Kamchatka","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              149.7216796875,\n              47.39834920035926\n            ],\n            [\n              149.7216796875,\n              63.97596090918338\n            ],\n            [\n              176.22070312499997,\n              63.97596090918338\n            ],\n            [\n              176.22070312499997,\n              47.39834920035926\n            ],\n            [\n              149.7216796875,\n              47.39834920035926\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"33","issue":"6","noUsgsAuthors":false,"publicationDate":"2006-03-16","publicationStatus":"PW","scienceBaseUri":"505a3afde4b0c8380cd62134","contributors":{"authors":[{"text":"Lundgren, Paul","contributorId":34806,"corporation":false,"usgs":true,"family":"Lundgren","given":"Paul","affiliations":[],"preferred":false,"id":427818,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lu, Zhong 0000-0001-9181-1818 lu@usgs.gov","orcid":"https://orcid.org/0000-0001-9181-1818","contributorId":901,"corporation":false,"usgs":true,"family":"Lu","given":"Zhong","email":"lu@usgs.gov","affiliations":[],"preferred":true,"id":427819,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70030601,"text":"70030601 - 2006 - Risk of Myxobolus cerebralis infection to rainbow trout in the Madison River, Montana, USA","interactions":[],"lastModifiedDate":"2016-05-23T14:53:38","indexId":"70030601","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1450,"text":"Ecological Applications","active":true,"publicationSubtype":{"id":10}},"title":"Risk of Myxobolus cerebralis infection to rainbow trout in the Madison River, Montana, USA","docAbstract":"<p>Myxobolus cerebralis, the parasite that causes salmonid whirling disease, has had detrimental effects on several salmonid populations in the Intermountain West, including the rainbow trout in the Madison River, Montana, USA. The goal of this study was to examine relationships among characteristics of the environment, Tubifex tubifex (the alternate host) populations, and rainbow trout whirling disease risk in the Madison River. Environmental characteristics were measured in side channels of the Madison River, and differences were described with a principal components analysis. The density of T. tubifex, the prevalence of infection in T. tubifex, and the density of infected T. tubifex were determined for the side channels using benthic core samples and examination of live tubificids for infection. The site-specific contribution to whirling disease risk in the side channels was determined using in situ exposures of sentinel rainbow trout. Regression analyses were used to determine correlations among these characteristics. Side channels differed in site-specific contribution to rainbow trout whirling disease risk, which was positively correlated to the density of infected T. tubifex. Side channels with fine sediments and lower water temperatures made greater site-specific contribution to whirling disease risk and had higher densities of infected T. tubifex than side channels with coarser sediments and higher temperatures. The ability to characterize areas of high whirling disease risk is essential for improving our understanding of the dynamics of M. cerebralis such that appropriate management strategies can be implemented. In addition, this study provides a model of how the disease ecology of complex aquatic parasites can be examined when the influential processes operate on different spatial scales. ?? 2006 by the Ecological Society of America.</p>","language":"English","publisher":"Ecological Society of America","doi":"10.1890/1051-0761(2006)016[0770:ROMCIT]2.0.CO;2","issn":"10510761","usgsCitation":"Krueger, R., Kerans, B., Vincent, E., and Rasmussen, C., 2006, Risk of Myxobolus cerebralis infection to rainbow trout in the Madison River, Montana, USA: Ecological Applications, v. 16, no. 2, p. 770-783, https://doi.org/10.1890/1051-0761(2006)016[0770:ROMCIT]2.0.CO;2.","productDescription":"14 p.","startPage":"770","endPage":"783","numberOfPages":"14","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":654,"text":"Western Fisheries Research Center","active":true,"usgs":true}],"links":[{"id":239352,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Montana","otherGeospatial":"Madison River","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -111.64169311523438,\n              45.0938831252118\n            ],\n            [\n              -111.6925048828125,\n              45.08321794926837\n            ],\n            [\n              -111.69937133789062,\n              45.00365115687189\n            ],\n            [\n              -111.57302856445312,\n              44.83347388333049\n            ],\n            [\n              -111.43569946289062,\n              44.79450545288309\n            ],\n            [\n              -111.41921997070312,\n              44.822760189927365\n            ],\n            [\n              -111.43569946289062,\n              44.85100108620397\n            ],\n            [\n              -111.57852172851562,\n              44.93175198383987\n            ],\n            [\n              -111.64993286132812,\n              45.03956694724904\n            ],\n            [\n              -111.64993286132812,\n              45.08515722028692\n            ],\n            [\n              -111.64169311523438,\n              45.0938831252118\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"16","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aad96e4b0c8380cd86f23","contributors":{"authors":[{"text":"Krueger, R.C.","contributorId":32350,"corporation":false,"usgs":true,"family":"Krueger","given":"R.C.","email":"","affiliations":[],"preferred":false,"id":427804,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kerans, B.L.","contributorId":93610,"corporation":false,"usgs":true,"family":"Kerans","given":"B.L.","email":"","affiliations":[],"preferred":false,"id":427807,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Vincent, E.R.","contributorId":64889,"corporation":false,"usgs":true,"family":"Vincent","given":"E.R.","email":"","affiliations":[],"preferred":false,"id":427805,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Rasmussen, C.","contributorId":66392,"corporation":false,"usgs":true,"family":"Rasmussen","given":"C.","email":"","affiliations":[],"preferred":false,"id":427806,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70030738,"text":"70030738 - 2006 - Characterization of unsaturated zone hydrogeologic units using matrix properties and depositional history in a complex volcanic environment","interactions":[],"lastModifiedDate":"2018-03-30T12:23:18","indexId":"70030738","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3674,"text":"Vadose Zone Journal","active":true,"publicationSubtype":{"id":10}},"title":"Characterization of unsaturated zone hydrogeologic units using matrix properties and depositional history in a complex volcanic environment","docAbstract":"<p><span>Characterization of the physical and unsaturated hydrologic properties of subsurface materials is necessary to calculate flow and transport for land use practices and to evaluate subsurface processes such as perched water or lateral diversion of water, which are influenced by features such as faults, fractures, and abrupt changes in lithology. Input for numerical flow models typically includes parameters that describe hydrologic properties and the initial and boundary conditions for all materials in the unsaturated zone, such as bulk density, porosity, and particle density, saturated hydraulic conductivity, moisture-retention characteristics, and field water content. We describe an approach for systematically evaluating the site features that contribute to water flow, using physical and hydraulic data collected at the laboratory scale, to provide a representative set of physical and hydraulic parameters for numerically calculating flow of water through the materials at a site. An example case study from analyses done for the heterogeneous, layered, volcanic rocks at Yucca Mountain is presented, but the general approach for parameterization could be applied at any site where depositional processes follow deterministic patterns. Hydrogeologic units at this site were defined using (i) a database developed from 5320 rock samples collected from the coring of 23 shallow (&lt;100 m) and 10 deep (500–1000 m) boreholes, (ii) lithostratigraphic boundaries and corresponding relations to porosity, (iii) transition zones with pronounced changes in properties over short vertical distances, (iv) characterization of the influence of mineral alteration on hydrologic properties such as permeability and moisture-retention characteristics, and (v) a statistical analysis to evaluate where boundaries should be adjusted to minimize the variance within layers. Model parameters developed in this study, and the relation of flow properties to porosity, can be used to produce detailed and accurate representations of the core-scale hydrologic processes ongoing at Yucca Mountain.</span></p>","language":"English","publisher":"ACSESS","doi":"10.2136/vzj2004.0180","usgsCitation":"Flint, L.E., Buesch, D.C., and Flint, A.L., 2006, Characterization of unsaturated zone hydrogeologic units using matrix properties and depositional history in a complex volcanic environment: Vadose Zone Journal, v. 5, no. 1, p. 480-492, https://doi.org/10.2136/vzj2004.0180.","productDescription":"13 p.","startPage":"480","endPage":"492","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true},{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":238758,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"5","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f4e8e4b0c8380cd4bfce","contributors":{"authors":[{"text":"Flint, Lorraine E. 0000-0002-7868-441X lflint@usgs.gov","orcid":"https://orcid.org/0000-0002-7868-441X","contributorId":1184,"corporation":false,"usgs":true,"family":"Flint","given":"Lorraine","email":"lflint@usgs.gov","middleInitial":"E.","affiliations":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"preferred":true,"id":428461,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Buesch, David C. 0000-0002-4978-5027 dbuesch@usgs.gov","orcid":"https://orcid.org/0000-0002-4978-5027","contributorId":1154,"corporation":false,"usgs":true,"family":"Buesch","given":"David","email":"dbuesch@usgs.gov","middleInitial":"C.","affiliations":[{"id":309,"text":"Geology and Geophysics Science Center","active":true,"usgs":true},{"id":234,"text":"Earthquake Hazards Program","active":true,"usgs":true},{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":428462,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Flint, Alan L. 0000-0002-5118-751X aflint@usgs.gov","orcid":"https://orcid.org/0000-0002-5118-751X","contributorId":1492,"corporation":false,"usgs":true,"family":"Flint","given":"Alan","email":"aflint@usgs.gov","middleInitial":"L.","affiliations":[{"id":657,"text":"Western Geographic Science Center","active":true,"usgs":true},{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"preferred":true,"id":428463,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70028965,"text":"70028965 - 2006 - Holocene environmental and parasequence development of the St. Jones Estuary, Delaware (USA): Foraminiferal proxies of natural climatic and anthropogenic change","interactions":[],"lastModifiedDate":"2012-03-12T17:20:57","indexId":"70028965","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2996,"text":"Palaeogeography, Palaeoclimatology, Palaeoecology","printIssn":"0031-0182","active":true,"publicationSubtype":{"id":10}},"title":"Holocene environmental and parasequence development of the St. Jones Estuary, Delaware (USA): Foraminiferal proxies of natural climatic and anthropogenic change","docAbstract":"The benthic foraminiferal record of marshes located along western Delaware Bay (St. Jones Estuary, USA) reflects the response of estuaries to sea-level and paleoclimate change during the Holocene. System tracts are recognized and within them parasequences based on sedimentological and foraminiferal assemblages identification. The parasequences defined by foraminiferal assemblages appear correlative with rapid Holocene climate changes that are of worldwide significance: 6000-5000, 4200-3800, 3500-2500, 1200-1000, and 600??cal years BP. Following postglacial sea-level rise, modern subestuaries and marshes in the region began to develop between 6000 and 4000??years BP, depending on their proximity to the mouth of Delaware Bay and coastal geomorphology. Initial sediments were fluvial in origin, with freshwater marshes established around 4000??years BP. The subsequent sea-level transgression occurred sufficiently slowly that freshwater marshes alternated with salt marshes at the same sites to around 3000??years BP. Locally another two transgressions are identified at 1800 and 1000??years BP respectively. Marine influence increased in the estuaries until 600??years BP (Little Ice Age), when regression occurred. Sea-level began to rise again during the mid-19th Century at the end of the Little Ice Age, when marshes became established. The presence of a sand lens in the upper and middle estuary and the reduction in the number of tests in the top samples in cores from the same area also suggest an anthropogenic influence. The estuary infill resulted in a sharp transgressive sequence, represented by salt marsh foraminiferal assemblages in the upper part of the cores. The increase in marsh foraminifera in both areas suggests an increase in marine influence that might be due to the transgression beginning at the end of the Little Ice Age about 150-180??years ago coupled with anthropogenic straightening of the channel in 1913. ?? 2006 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Palaeogeography, Palaeoclimatology, Palaeoecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.palaeo.2006.04.011","issn":"00310182","usgsCitation":"Leorri, E., Martin, R., and McLaughlin, P., 2006, Holocene environmental and parasequence development of the St. Jones Estuary, Delaware (USA): Foraminiferal proxies of natural climatic and anthropogenic change: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 241, no. 3-4, p. 590-607, https://doi.org/10.1016/j.palaeo.2006.04.011.","startPage":"590","endPage":"607","numberOfPages":"18","costCenters":[],"links":[{"id":209830,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.palaeo.2006.04.011"},{"id":236558,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"241","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a31dfe4b0c8380cd5e2e2","contributors":{"authors":[{"text":"Leorri, E.","contributorId":46283,"corporation":false,"usgs":true,"family":"Leorri","given":"E.","affiliations":[],"preferred":false,"id":420763,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Martin, R.","contributorId":59223,"corporation":false,"usgs":true,"family":"Martin","given":"R.","affiliations":[],"preferred":false,"id":420764,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"McLaughlin, P.","contributorId":20133,"corporation":false,"usgs":true,"family":"McLaughlin","given":"P.","email":"","affiliations":[],"preferred":false,"id":420762,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030400,"text":"70030400 - 2006 - Large rock avalanches triggered by the M 7.9 Denali Fault, Alaska, earthquake of 3 November 2002","interactions":[],"lastModifiedDate":"2012-03-12T17:21:12","indexId":"70030400","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1517,"text":"Engineering Geology","active":true,"publicationSubtype":{"id":10}},"title":"Large rock avalanches triggered by the M 7.9 Denali Fault, Alaska, earthquake of 3 November 2002","docAbstract":"The moment magnitude (M) 7.9 Denali Fault, Alaska, earthquake of 3 November 2002 triggered thousands of landslides, primarily rock falls and rock slides, that ranged in volume from rock falls of a few cubic meters to rock avalanches having volumes as great as 20 ?? 106 m3. The pattern of landsliding was unusual: the number and concentration of triggered slides was much less than expected for an earthquake of this magnitude, and the landslides were concentrated in a narrow zone about 30-km wide that straddled the fault-rupture zone over its entire 300-km length. Despite the overall sparse landslide concentration, the earthquake triggered several large rock avalanches that clustered along the western third of the rupture zone where acceleration levels and ground-shaking frequencies are thought to have been the highest. Inferences about near-field strong-shaking characteristics drawn from interpretation of the landslide distribution are strikingly consistent with results of recent inversion modeling that indicate that high-frequency energy generation was greatest in the western part of the fault-rupture zone and decreased markedly to the east. ?? 2005 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Engineering Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.enggeo.2005.06.029","issn":"00137952","usgsCitation":"Jibson, R., Harp, E.L., Schulz, W., and Keefer, D.K., 2006, Large rock avalanches triggered by the M 7.9 Denali Fault, Alaska, earthquake of 3 November 2002: Engineering Geology, v. 83, no. 1-3, p. 144-160, https://doi.org/10.1016/j.enggeo.2005.06.029.","startPage":"144","endPage":"160","numberOfPages":"17","costCenters":[],"links":[{"id":212095,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.enggeo.2005.06.029"},{"id":239516,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"83","issue":"1-3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a4481e4b0c8380cd66b79","contributors":{"authors":[{"text":"Jibson, R.W.","contributorId":8467,"corporation":false,"usgs":true,"family":"Jibson","given":"R.W.","email":"","affiliations":[],"preferred":false,"id":427013,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Harp, E. L.","contributorId":59026,"corporation":false,"usgs":true,"family":"Harp","given":"E.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":427015,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Schulz, W.","contributorId":6641,"corporation":false,"usgs":true,"family":"Schulz","given":"W.","email":"","affiliations":[],"preferred":false,"id":427012,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Keefer, D. K.","contributorId":21176,"corporation":false,"usgs":true,"family":"Keefer","given":"D.","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":427014,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70030404,"text":"70030404 - 2006 - Basic concepts for the linear model of ground water level recession","interactions":[],"lastModifiedDate":"2012-03-12T17:21:12","indexId":"70030404","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1861,"text":"Ground Water","active":true,"publicationSubtype":{"id":10}},"title":"Basic concepts for the linear model of ground water level recession","docAbstract":"Basic concepts are illustrated for the display of ground water level recession as a linear plot on a semilog graph, as first described by Rorabaugh. This exponential decay function can be achieved if there is a definable outflow boundary such as a lake or river and if water levels are expressed relative to the altitude of the boundary. The model can be used to estimate aquifer hydraulic diffusivity. Concepts are illustrated using three finite-difference simulations. One represents the ideal case as described by Rorabaugh, in which the altitude of the outflow boundary is uniform along its length. Another simulation includes a sloping boundary with simple geometry and demonstrates that the model can be used accurately. Based on this simulation, it appears that the ground water level must be expressed relative to the closest point on the outflow boundary. The third simulation includes a sloping boundary and complex boundary shape, and demonstrates departures from the linear model of recession and errors in the estimate of hydraulic diffusivity. Another cause of nonlinearity is the instability of the ground water head profile soon after a recharge event. The nature of these early-time departures will vary depending on the location of the water level observation site relative to the outflow boundary and the hydrologic divide of the ground water flow system. ?? 2006 National Ground Water Association.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ground Water","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1745-6584.2005.00157.x","issn":"0017467X","usgsCitation":"Rutledge, A.T., 2006, Basic concepts for the linear model of ground water level recession: Ground Water, v. 44, no. 3, p. 483-487, https://doi.org/10.1111/j.1745-6584.2005.00157.x.","startPage":"483","endPage":"487","numberOfPages":"5","costCenters":[],"links":[{"id":212150,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1745-6584.2005.00157.x"},{"id":239587,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"44","issue":"3","noUsgsAuthors":false,"publicationDate":"2005-11-18","publicationStatus":"PW","scienceBaseUri":"5059efe1e4b0c8380cd4a4cf","contributors":{"authors":[{"text":"Rutledge, A. T.","contributorId":38532,"corporation":false,"usgs":true,"family":"Rutledge","given":"A.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":427024,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70030406,"text":"70030406 - 2006 - Thermodynamic calculations in the system CH4-H2O and methane hydrate phase equilibria","interactions":[],"lastModifiedDate":"2012-03-12T17:21:03","indexId":"70030406","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2425,"text":"Journal of Physical Chemistry B","active":true,"publicationSubtype":{"id":10}},"title":"Thermodynamic calculations in the system CH4-H2O and methane hydrate phase equilibria","docAbstract":"Using the Gibbs function of reaction, equilibrium pressure, temperature conditions for the formation of methane clathrate hydrate have been calculated from the thermodynamic properties of phases in the system CH4-H 2O. The thermodynamic model accurately reproduces the published phase-equilibria data to within ??2 K of the observed equilibrium boundaries in the range 0.08-117 MPa and 190-307 K. The model also provides an estimate of the third-law entropy of methane hydrate at 273.15 K, 0.1 MPa of 56.2 J mol-1 K-1 for 1/n CH4??H 2O, where n is the hydrate number. Agreement between the calculated and published phase-equilibria data is optimized when the hydrate composition is fixed and independent of the pressure and temperature for the conditions modeled. ?? 2006 American Chemical Society.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Physical Chemistry B","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1021/jp055422f","issn":"15206106","usgsCitation":"Circone, S., Kirby, S.H., and Stern, L., 2006, Thermodynamic calculations in the system CH4-H2O and methane hydrate phase equilibria: Journal of Physical Chemistry B, v. 110, no. 16, p. 8232-8239, https://doi.org/10.1021/jp055422f.","startPage":"8232","endPage":"8239","numberOfPages":"8","costCenters":[],"links":[{"id":211721,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1021/jp055422f"},{"id":239065,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"110","issue":"16","noUsgsAuthors":false,"publicationDate":"2006-04-04","publicationStatus":"PW","scienceBaseUri":"505bb26ee4b08c986b3257d2","contributors":{"authors":[{"text":"Circone, S.","contributorId":35901,"corporation":false,"usgs":true,"family":"Circone","given":"S.","email":"","affiliations":[],"preferred":false,"id":427030,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kirby, S. H.","contributorId":51721,"corporation":false,"usgs":true,"family":"Kirby","given":"S.","middleInitial":"H.","affiliations":[],"preferred":false,"id":427032,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Stern, L.A.","contributorId":38293,"corporation":false,"usgs":true,"family":"Stern","given":"L.A.","email":"","affiliations":[],"preferred":false,"id":427031,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030717,"text":"70030717 - 2006 - Do geese fully develop brood patches? A histological analysis of lesser snow geese (Chen caerulescens caerulescens) and Ross's geese (C. rossii)","interactions":[],"lastModifiedDate":"2012-03-12T17:21:10","indexId":"70030717","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2226,"text":"Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology","active":true,"publicationSubtype":{"id":10}},"title":"Do geese fully develop brood patches? A histological analysis of lesser snow geese (Chen caerulescens caerulescens) and Ross's geese (C. rossii)","docAbstract":"Most birds develop brood patches before incubation; epidermis and dermis in the brood patch region thicken, and the dermal connective tissue becomes increasingly vascularized and infiltrated by leukocytes. However, current dogma states that waterfowl incubate without modifications of skin within the brood patch region. The incubation periods of lesser snow geese (Chen caerulescens caerulescens; hereafter called snow geese) and Ross's geese (C. rossii) are 2-6 days shorter than those of other goose species; only females incubate. Thus, we hypothesized that such short incubation periods would require fully developed brood patches for sufficient heat transfer from incubating parents to eggs. We tested this hypothesis by analyzing the skin histology of abdominal regions of snow and Ross's geese collected at Karrak Lake, Nunavut, Canada. For female snow geese, we found that epidermis and dermis had thickened and vascularization of dermis was 14 times greater, on average, than that observed in males (n=5 pairs). Our results for Ross's geese (n=5 pairs) were more variable, wherein only one of five female Ross's geese fully developed a brood patch. Our results are consistent with three hypotheses about brood patch development and its relationship with different energetic cost-benefit relationships, resulting from differences in embryonic development and body size. ?? Springer-Verlag 2006.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s00360-006-0066-y","issn":"01741578","usgsCitation":"Jonsson, J., Afton, A., Homberger, D., Henk, W., and Alisauskas, R., 2006, Do geese fully develop brood patches? A histological analysis of lesser snow geese (Chen caerulescens caerulescens) and Ross's geese (C. rossii): Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology, v. 176, no. 5, p. 453-462, https://doi.org/10.1007/s00360-006-0066-y.","startPage":"453","endPage":"462","numberOfPages":"10","costCenters":[],"links":[{"id":212111,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s00360-006-0066-y"},{"id":239536,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"176","issue":"5","noUsgsAuthors":false,"publicationDate":"2006-01-24","publicationStatus":"PW","scienceBaseUri":"505a0361e4b0c8380cd50466","contributors":{"authors":[{"text":"Jonsson, J.E.","contributorId":61623,"corporation":false,"usgs":true,"family":"Jonsson","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":428369,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Afton, A. D.","contributorId":83467,"corporation":false,"usgs":true,"family":"Afton","given":"A. D.","affiliations":[],"preferred":false,"id":428371,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Homberger, D.G.","contributorId":56033,"corporation":false,"usgs":true,"family":"Homberger","given":"D.G.","email":"","affiliations":[],"preferred":false,"id":428368,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Henk, W.G.","contributorId":64891,"corporation":false,"usgs":true,"family":"Henk","given":"W.G.","email":"","affiliations":[],"preferred":false,"id":428370,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Alisauskas, R.T.","contributorId":89645,"corporation":false,"usgs":true,"family":"Alisauskas","given":"R.T.","affiliations":[],"preferred":false,"id":428372,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70030409,"text":"70030409 - 2006 - A Lower Carboniferous two-stage extensional basin along the Avalon-Meguma terrane boundary: Evidence from southeastern Isle Madame, Nova Scotia","interactions":[],"lastModifiedDate":"2023-03-06T17:14:31.861768","indexId":"70030409","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":918,"text":"Atlantic Geology","active":true,"publicationSubtype":{"id":10}},"title":"A Lower Carboniferous two-stage extensional basin along the Avalon-Meguma terrane boundary: Evidence from southeastern Isle Madame, Nova Scotia","docAbstract":"<p><span>Anomalously thick and coarse clastic sedimentary successions, including over 5000 m of conglomerate, are exposed on Isle Madame off the southern coast of Cape Breton island. Two steeply to moderately dipping stratigraphic packages are recognized: one involving Horton and lower Windsor groups (Tournasian–Visean); the other involving upper Windsor and Mabou (Visean–Namurian) groups. Also anomalous on isle Madame are three long narrow belts of “basement” rocks, together with voluminous chloritic microbreccia and minor semi-ductile mylonite, which are separated from the conglomerate-dominated successions by faults. The angular relations between the cataclastic rocks and the conglomerate units, combined with the presence of cataclasite clasts in the conglomerate units and evidence of dip-slip faults within the basin, suggest an extensional setting, where listric normal faults outline detachment allochthons. Allochthon geometry requires two stages of extension, the older stage completed in early Windsor Group time and including most of the island, and the more local younger stage completed in Mabou Group time. Domino-style upper-plate faulting in the younger stage locally repeated the older detachment relation of basement and conglomerate to form the observed narrow belts. Re-rotation of older successions in the younger stage also locally overturned the Horton Group. These features developed within a broad zone of Carboniferous dextral transcurrent faulting between already-docked Avalon and Meguma terranes. Sites of transpression and transtension alternated along the Cobequid-Chedabucto fault zone that separated these terranes. The earlier extensional features in isle Madame likely represent the northern headwall and associated clastic debris of a pull-apart or other type of transtensional basin developed along part of this fault zone that had become listric; they were repeated and exposed by being up-ended in the second stage of extension, also on listric faults. The two-stage history on isle Madame exposes the deeper parts of one of the Horton-age extensional basins of the Maritimes, others of which have been described as half-grabens based on their shallower exposures.&nbsp;</span></p>","language":"English","publisher":"Atlantic Geology","doi":"10.4138/2156","usgsCitation":"Force, E.R., and Barr, S., 2006, A Lower Carboniferous two-stage extensional basin along the Avalon-Meguma terrane boundary: Evidence from southeastern Isle Madame, Nova Scotia: Atlantic Geology, v. 42, no. 1, p. 53-68, https://doi.org/10.4138/2156.","productDescription":"16 p.","startPage":"53","endPage":"68","numberOfPages":"16","costCenters":[],"links":[{"id":477581,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.4138/2156","text":"Publisher Index Page"},{"id":239133,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Canada","state":"Nova Scotia","otherGeospatial":"Isle Madame","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -60.86096556191771,\n              45.60210122802951\n            ],\n            [\n              -61.142749831179415,\n              45.60210122802951\n            ],\n            [\n              -61.142749831179415,\n              45.44539295380835\n            ],\n            [\n              -60.86096556191771,\n              45.44539295380835\n            ],\n            [\n              -60.86096556191771,\n              45.60210122802951\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"42","issue":"1","noUsgsAuthors":false,"publicationDate":"2006-04-01","publicationStatus":"PW","scienceBaseUri":"5059e2e7e4b0c8380cd45d0a","contributors":{"authors":[{"text":"Force, Eric R.","contributorId":32916,"corporation":false,"usgs":true,"family":"Force","given":"Eric","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":427039,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Barr, S. M.","contributorId":64398,"corporation":false,"usgs":false,"family":"Barr","given":"S. M.","affiliations":[],"preferred":false,"id":427040,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70030415,"text":"70030415 - 2006 - Factors determining Pochard nest predation along a wetland gradient","interactions":[],"lastModifiedDate":"2019-06-17T15:41:52","indexId":"70030415","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Factors determining Pochard nest predation along a wetland gradient","docAbstract":"<p><span>Waterfowl management on breeding grounds focuses on improving nest success, but few studies have compared waterfowl nest success and factors affecting nest survival along a wetland gradient and simultaneously identified nest predators. We monitored nests (n = 195) of common pochards (</span><i><span class=\"genus-species\">Aythya ferina</span></i><span>) in Trebon Basin Biosphere Reserve, Czech Republic, during 1999–2002. Daily nest survival rates (DSRs, logistic-exposure) declined from island (0.985, 95% confidence interval, 0.978–0.991) to overwater (0.962, 0.950–0.971) and terrestrial (0.844, 0.759–0.904) nests. The most parsimonious model for DSRs included habitat class (DSRs: island &gt; overwater &gt; terrestrial) and nest visibility. Nest survival was improved by reduced nest visibility, increased water depth, and increased distance from the nest to habitat edge in littoral habitats. On islands, nest success increased with advancing date and increased distance to open water. A model of constant nest survival best explained the data for terrestrial nests. There were no observer effects on DSRs in any habitat. In 2003, artificial nests (</span><i>n</i><span>&nbsp;= 180; 120 contained a wax-filled egg) were deployed on study plots. The model that best explained variation in DSRs for artificial nests included only 1 variable: habitat class (DSRs: island ≥ overwater &gt; terrestrial). Mammalian predation of artificial nests (by foxes [</span><i><span class=\"genus-species\">Vulpes vulpes</span></i><span>] and martens [</span><i><span class=\"genus-species\">Martes</span></i><span>&nbsp;spp.]) was more likely in terrestrial habitats than in littoral habitats or on islands. By contrast, corvids and marsh harriers (</span><i><span class=\"genus-species\">Circus aeruginosus</span></i><span>) prevailed among predators of overwater and island nests. Our data indicate that artificial islands and wide strips of littoral vegetation may represent secure breeding habitats for waterfowl because those habitats allow nests to be placed in areas that are not accessible to, or that are avoided by, mammalian predators. Management actions should be aimed at preserving these habitats. This, along with creation of new artificial islands, could help to enhance breeding productivity of pochards and possibly other waterfowl species inhabiting man-made ponds.</span></p>","language":"English","publisher":"BioOne","doi":"10.2193/0022-541X(2006)70[784:FDPNPA]2.0.CO;2","issn":"0022541X","usgsCitation":"Albrecht, T., Horak, D., Kreisinger, J., Weidinger, K., Klvana, P., and Michot, T., 2006, Factors determining Pochard nest predation along a wetland gradient: Journal of Wildlife Management, v. 70, no. 3, p. 784-791, https://doi.org/10.2193/0022-541X(2006)70[784:FDPNPA]2.0.CO;2.","productDescription":"8 p.","startPage":"784","endPage":"791","numberOfPages":"8","costCenters":[],"links":[{"id":239234,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Czech Republic","otherGeospatial":"Trebon Basin Biosphere Reserve","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              14.724340438842772,\n              48.980104320525676\n            ],\n            [\n              14.782533645629881,\n              48.980104320525676\n            ],\n            [\n              14.782533645629881,\n              49.00313898314858\n            ],\n            [\n              14.724340438842772,\n              49.00313898314858\n            ],\n            [\n              14.724340438842772,\n              48.980104320525676\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"70","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0e92e4b0c8380cd53511","contributors":{"authors":[{"text":"Albrecht, T.","contributorId":68533,"corporation":false,"usgs":true,"family":"Albrecht","given":"T.","email":"","affiliations":[],"preferred":false,"id":427061,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Horak, D.","contributorId":50728,"corporation":false,"usgs":true,"family":"Horak","given":"D.","email":"","affiliations":[],"preferred":false,"id":427060,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kreisinger, J.","contributorId":88556,"corporation":false,"usgs":true,"family":"Kreisinger","given":"J.","email":"","affiliations":[],"preferred":false,"id":427062,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Weidinger, K.","contributorId":15825,"corporation":false,"usgs":true,"family":"Weidinger","given":"K.","email":"","affiliations":[],"preferred":false,"id":427057,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Klvana, P.","contributorId":22966,"corporation":false,"usgs":true,"family":"Klvana","given":"P.","email":"","affiliations":[],"preferred":false,"id":427058,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Michot, T.C. 0000-0002-7044-987X","orcid":"https://orcid.org/0000-0002-7044-987X","contributorId":43426,"corporation":false,"usgs":true,"family":"Michot","given":"T.C.","affiliations":[],"preferred":false,"id":427059,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70031149,"text":"70031149 - 2006 - Variability in supply and cross-shelf transport of pink shrimp (<i>Farfantepenaeus duorarum</i>) postlarvae into western Florida Bay","interactions":[],"lastModifiedDate":"2016-03-30T13:48:43","indexId":"70031149","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1663,"text":"Fishery Bulletin","printIssn":"0090-0656","active":true,"publicationSubtype":{"id":10}},"title":"Variability in supply and cross-shelf transport of pink shrimp (<i>Farfantepenaeus duorarum</i>) postlarvae into western Florida Bay","docAbstract":"<p>The variability in the supply of pink shrimp (<i>Farfantepenaeus duorarum</i>) postlarvae and the transport mechanisms of planktonic stages were investigated with field data and simulations of transport. Postlarvae entering the nursery grounds of Florida Bay were collected for three consecutive years at channels that connect the Bay with the Gulf of Mexico, and in channels of the Middle Florida Keys that connect the southeastern margin of the Bay with the Atlantic Ocean. The influx of postlarvae in the Middle Florida Keys was low in magnitude and varied seasonally and among years. In contrast, the greater postlarval influx occurred at the northwestern border of the Bay, where there was a strong seasonal pattern with peaks in influx from July through September each year. Planktonic stages need to travel up to 150 km eastward between spawning grounds (northeast of Dry Tortugas) and nursery grounds (western Florida Bay) in about 30 days, the estimated time of planktonic development for this species. A Lagrangian trajectory model was developed to estimate the drift of planktonic stages across the SW Florida shelf. The model simulated the maximal distance traveled by planktonic stages under various assumptions of behavior. &nbsp;Simulation results indicated that larvae traveling with the instantaneous current and exhibiting a diel behavior travel up to 65 km and 75% of the larvae travel only 30 km. However, the eastward distance traveled increased substantially when a larval response to tides was added to the behavioral variable (distance increased to 200 km and 85% of larvae traveled 150 km). The question is, when during larval development, and where on the shallow SW Florida shelf, does the tidal response become incorporated into the behavior of pink shrimp.</p>","language":"English","publisher":"U.S. Government Printing Office","publisherLocation":"Washington, D.C.","issn":"00900656","usgsCitation":"Criales, M.M., Wang, J.D., Browder, J.A., Robblee, M.B., Jackson, T.L., and Hittle, C.D., 2006, Variability in supply and cross-shelf transport of pink shrimp (<i>Farfantepenaeus duorarum</i>) postlarvae into western Florida Bay: Fishery Bulletin, v. 104, no. 1, p. 60-74.","productDescription":"15 p.","startPage":"60","endPage":"74","numberOfPages":"15","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":238947,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":319626,"rank":1,"type":{"id":15,"text":"Index Page"},"url":"https://fishbull.noaa.gov/1041/1041toc.htm"}],"country":"United States","state":"Florida","otherGeospatial":"Dry Tortugas, Florida Bay","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -79.91455078125,\n              25.94816628853973\n            ],\n            [\n              -79.9200439453125,\n              25.54244147012483\n            ],\n            [\n              -80.2166748046875,\n              25.04081549894912\n            ],\n            [\n              -80.8648681640625,\n              24.56211235799689\n            ],\n            [\n              -81.5789794921875,\n              24.412140070651528\n            ],\n            [\n              -82.6336669921875,\n              24.382124181118236\n            ],\n            [\n              -83.07861328125,\n              24.45215015618098\n            ],\n            [\n              -83.1060791015625,\n              24.696934226366672\n            ],\n            [\n              -82.5787353515625,\n              24.806681353851964\n            ],\n            [\n              -81.3262939453125,\n              24.926294766395593\n            ],\n            [\n              -80.760498046875,\n              25.224820176765036\n            ],\n            [\n              -80.4364013671875,\n              25.606855993715016\n            ],\n            [\n              -80.343017578125,\n              25.849336891707605\n            ],\n            [\n              -80.2056884765625,\n              25.93828707492375\n            ],\n            [\n              -80.04638671875,\n              25.96792222903405\n            ],\n            [\n              -79.91455078125,\n              25.94816628853973\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"104","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bc12fe4b08c986b32a492","contributors":{"authors":[{"text":"Criales, Maria M.","contributorId":69330,"corporation":false,"usgs":false,"family":"Criales","given":"Maria","email":"","middleInitial":"M.","affiliations":[{"id":12565,"text":"Rosenstiel School of Atomospheric Science, University of Miami","active":true,"usgs":false}],"preferred":false,"id":430260,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wang, John D.","contributorId":75224,"corporation":false,"usgs":true,"family":"Wang","given":"John","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":430261,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Browder, Joan A.","contributorId":7439,"corporation":false,"usgs":true,"family":"Browder","given":"Joan","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":430257,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Robblee, Michael B. mike_robblee@usgs.gov","contributorId":3865,"corporation":false,"usgs":true,"family":"Robblee","given":"Michael","email":"mike_robblee@usgs.gov","middleInitial":"B.","affiliations":[],"preferred":true,"id":430258,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Jackson, Thomas L.","contributorId":93667,"corporation":false,"usgs":true,"family":"Jackson","given":"Thomas","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":430262,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Hittle, Clinton D. cdhittle@usgs.gov","contributorId":2436,"corporation":false,"usgs":true,"family":"Hittle","given":"Clinton","email":"cdhittle@usgs.gov","middleInitial":"D.","affiliations":[],"preferred":true,"id":430259,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70029027,"text":"70029027 - 2006 - Statistical modeling of storm-level Kp occurrences","interactions":[],"lastModifiedDate":"2018-10-29T11:41:51","indexId":"70029027","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1807,"text":"Geophysical Research Letters","active":true,"publicationSubtype":{"id":10}},"title":"Statistical modeling of storm-level Kp occurrences","docAbstract":"We consider the statistical modeling of the occurrence in time of large Kp magnetic storms as a Poisson process, testing whether or not relatively rare, large Kp events can be considered to arise from a stochastic, sequential, and memoryless process. For a Poisson process, the wait times between successive events occur statistically with an exponential density function. Fitting an exponential function to the durations between successive large Kp events forms the basis of our analysis. Defining these wait times by calculating the differences between times when Kp exceeds a certain value, such as Kp ??? 5, we find the wait-time distribution is not exponential. Because large storms often have several periods with large Kp values, their occurrence in time is not memoryless; short duration wait times are not independent of each other and are often clumped together in time. If we remove same-storm large Kp occurrences, the resulting wait times are very nearly exponentially distributed and the storm arrival process can be characterized as Poisson. Fittings are performed on wait time data for Kp ??? 5, 6, 7, and 8. The mean wait times between storms exceeding such Kp thresholds are 7.12, 16.55, 42.22, and 121.40 days respectively.","language":"English","publisher":"AGU","doi":"10.1029/2006GL026687","issn":"00948276","usgsCitation":"Remick, K., and Love, J.J., 2006, Statistical modeling of storm-level Kp occurrences: Geophysical Research Letters, v. 33, no. 16, Article L16102; 4 p., https://doi.org/10.1029/2006GL026687.","productDescription":"Article L16102; 4 p.","costCenters":[{"id":300,"text":"Geologic Hazards Science Center","active":true,"usgs":true}],"links":[{"id":477533,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2006gl026687","text":"Publisher Index Page"},{"id":236285,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":209625,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2006GL026687"}],"volume":"33","issue":"16","noUsgsAuthors":false,"publicationDate":"2006-08-22","publicationStatus":"PW","scienceBaseUri":"505b9734e4b08c986b31b946","contributors":{"authors":[{"text":"Remick, K.J.","contributorId":78139,"corporation":false,"usgs":true,"family":"Remick","given":"K.J.","email":"","affiliations":[],"preferred":false,"id":421015,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Love, Jeffrey J. 0000-0002-3324-0348 jlove@usgs.gov","orcid":"https://orcid.org/0000-0002-3324-0348","contributorId":760,"corporation":false,"usgs":true,"family":"Love","given":"Jeffrey","email":"jlove@usgs.gov","middleInitial":"J.","affiliations":[{"id":300,"text":"Geologic Hazards Science Center","active":true,"usgs":true}],"preferred":true,"id":421014,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70030885,"text":"70030885 - 2006 - Estimation of elastic moduli in a compressible Gibson half-space by inverting Rayleigh-wave phase velocity","interactions":[],"lastModifiedDate":"2012-03-12T17:21:03","indexId":"70030885","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3503,"text":"Surveys in Geophysics","active":true,"publicationSubtype":{"id":10}},"title":"Estimation of elastic moduli in a compressible Gibson half-space by inverting Rayleigh-wave phase velocity","docAbstract":"A Gibson half-space model (a non-layered Earth model) has the shear modulus varying linearly with depth in an inhomogeneous elastic half-space. In a half-space of sedimentary granular soil under a geostatic state of initial stress, the density and the Poisson's ratio do not vary considerably with depth. In such an Earth body, the dynamic shear modulus is the parameter that mainly affects the dispersion of propagating waves. We have estimated shear-wave velocities in the compressible Gibson half-space by inverting Rayleigh-wave phase velocities. An analytical dispersion law of Rayleigh-type waves in a compressible Gibson half-space is given in an algebraic form, which makes our inversion process extremely simple and fast. The convergence of the weighted damping solution is guaranteed through selection of the damping factor using the Levenberg-Marquardt method. Calculation efficiency is achieved by reconstructing a weighted damping solution using singular value decomposition techniques. The main advantage of this algorithm is that only three parameters define the compressible Gibson half-space model. Theoretically, to determine the model by the inversion, only three Rayleigh-wave phase velocities at different frequencies are required. This is useful in practice where Rayleigh-wave energy is only developed in a limited frequency range or at certain frequencies as data acquired at manmade structures such as dams and levees. Two real examples are presented and verified by borehole S-wave velocity measurements. The results of these real examples are also compared with the results of the layered-Earth model. ?? Springer 2006.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Surveys in Geophysics","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10712-005-7261-3","issn":"01693298","usgsCitation":"Xia, J., Xu, Y., Miller, R., and Chen, C., 2006, Estimation of elastic moduli in a compressible Gibson half-space by inverting Rayleigh-wave phase velocity: Surveys in Geophysics, v. 27, no. 1, p. 1-17, https://doi.org/10.1007/s10712-005-7261-3.","startPage":"1","endPage":"17","numberOfPages":"17","costCenters":[],"links":[{"id":211664,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10712-005-7261-3"},{"id":238998,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"27","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0b86e4b0c8380cd5276f","contributors":{"authors":[{"text":"Xia, J.","contributorId":63513,"corporation":false,"usgs":true,"family":"Xia","given":"J.","email":"","affiliations":[],"preferred":false,"id":429085,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Xu, Y.","contributorId":47816,"corporation":false,"usgs":true,"family":"Xu","given":"Y.","email":"","affiliations":[],"preferred":false,"id":429084,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Miller, R. D.","contributorId":92693,"corporation":false,"usgs":true,"family":"Miller","given":"R. D.","affiliations":[],"preferred":false,"id":429086,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Chen, C.","contributorId":98490,"corporation":false,"usgs":true,"family":"Chen","given":"C.","email":"","affiliations":[],"preferred":false,"id":429087,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
]}