This Appendix contains 3 sections that 1) documents published observations of surface creep on California faults, 2) constructs line integrals across the WG-07 deformation model to compare to the Pacific - North America plate motion, and 3) constructs strain tensors of volumes across the WG-07 deformation model to compare to the Pacific - North America plate motion. Observation of creep on faults is a critical part of our earthquake rupture model because if a fault is observed to creep the moment released as earthquakes is reduced from what would be inferred directly from the fault's slip rate. There is considerable debate about how representative creep measured at the surface during a short time period is of the whole fault surface through the entire seismic cycle (e.g. Hudnut and Clark, 1989). Observationally, it is clear that the amount of creep varies spatially and temporally on a fault. However, from a practical point of view a single creep rate is associated with a fault section and the reduction in seismic moment generated by the fault is accommodated in seismic hazard models by reducing the surface area that generates earthquakes or by reducing the slip rate that is converted into seismic energy. WG-07 decided to follow the practice of past Working Groups and the National Seismic Hazard Map and used creep rate (where it was judged to be interseismic, see Table P1) to reduce the area of the fault surface that generates seismic events. In addition to following past practice, this decision allowed the Working Group to use a reduction of slip rate as a separate factor to accommodate aftershocks, post seismic slip, possible aseismic permanent deformation along fault zones and other processes that are inferred to affect the entire surface area of a fault, and thus are better modeled as a reduction in slip rate. C-zones are also handled by a reduction in slip rate, because they are inferred to include regions of widely distributed shear that is not completely expressed as earthquakes large enough to model. Because the ratio of the rate of creep relative to the total slip rate is often used to infer the average depth of creep, the depth of creep can be calculated and used to reduce the surface area of a fault that generates earthquakes in our model. This reduction of surface area of rupture is described by an aseismicity factor, assigned to each creeping fault in Appendix A. An aseismicity factor of less than 1 is only assigned to faults that are inferred to creep during the entire interseismic period. A single aseismicity factor was chosen for each section of the fault that creeps by expert opinion from the observations documented here. Uncertainties were not determined for the aseismicity factor, and thus it represents an unmodeled (and difficult to model) source of error. This Appendix simply provides the documentation of known creep, the type and precision of its measurement, and attempts to characterize the creep as interseismic, afterslip, transient or triggered. Parts 2 and 3 of this Appendix compare the WG-07 deformation model and the seismic source model it generates to the strain generated by the Pacific - North American plate motion. The concept is that plate motion generates essentially all of the elastic strain in the vicinity of the plate boundary that can be released as earthquakes. Adding up the slip rates on faults and all others sources of deformation (such as C-zones and distributed background seismicity) should approximately yield the plate motion. This addition is usually accomplished by one of four approaches: 1) line integrals that sum deformation along discrete paths through the deforming zone between the two plates, 2) seismic moment tensors that add up seismic moment of a representative set of earthquakes generated by a crustal volume spanning the plate boundary, 3) strain tensors generated by adding up the strain associated with all of the faults in a crustal volume spanning the plate
","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Appendix P in The Uniform California Earthquake Rupture Forecast, Version 2 (UCERF 2)","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071437P","collaboration":"Prepared in cooperation with the California Geological Survey and the Southern California Earthquake Center","usgsCitation":"Wisely, B.A., Schmidt, D.A., and Weldon, R.J., 2008, Compilation of surface creep on California faults and comparison of WGCEP 2007 deformation model to Pacific-North American plate Mmtion (Version 1.0): U.S. Geological Survey Open-File Report 2007-1437, 43 p., https://doi.org/10.3133/ofr20071437P.","productDescription":"43 p.","costCenters":[{"id":234,"text":"Earthquake Hazards Program","active":true,"usgs":true},{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"links":[{"id":190690,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":11151,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2007/1437/p/","linkFileType":{"id":5,"text":"html"}}],"edition":"Version 1.0","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b1ee4b07f02db6aa03f","contributors":{"authors":[{"text":"Wisely, Beth A.","contributorId":41532,"corporation":false,"usgs":true,"family":"Wisely","given":"Beth","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":294420,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Schmidt, David A.","contributorId":51389,"corporation":false,"usgs":true,"family":"Schmidt","given":"David","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":294422,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Weldon, Ray J. II","contributorId":47859,"corporation":false,"usgs":true,"family":"Weldon","given":"Ray","suffix":"II","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":294421,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":81128,"text":"ofr20071437O - 2008 - Paleoseismic Investigations of the Walnut Site on the San Jacinto Fault","interactions":[],"lastModifiedDate":"2019-07-17T16:48:55","indexId":"ofr20071437O","displayToPublicDate":"2008-04-22T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1437","chapter":"O","title":"Paleoseismic Investigations of the Walnut Site on the San Jacinto Fault","docAbstract":"The Walnut paleoseismic site is located along the northern San Jacinto fault about 3 km southeast of the San Bernardino, California city center (Figures 1, 2). More than 340 meters of trenches were excavated across the fault zone at this site as part of an Alquist-Priolo fault study (Figure 3). We photographed and logged the SE wall and most of the NE wall of trench 1, both walls of trenches 2 and 7, the NW walls of trenches 3 and 4 and the SE wall of trench 6. After carefully cleaning the trench walls we put up a 1m by 0.5m string and nail grid. For trenches 1, 2, 6, and 7, we photographed each 1m by 0.5m panel individually and photologged on these unrectified photos. These large-scale photos were later rectified to remove the distortion due to irregularities in the trench walls and slight distortion introduced by the camera lens. Field linework was then transferred to the rectified photomosaics.\r\n\r\nWe also took a set of overview photographs for each trench taken from the top of the trench towards the opposite wall. We spliced together these overview photos to make photomosaics of all of the trenches. Because the photos were taken at a downward angle, there is significant distortion. Some of this distortion has been corrected: an attempt was made to keep horizontal grid lines horizontal and there has been some horizontal scaling to align vertical lines between benches. Although the string and nail grid spacing is 1 meter by 0.5 meter, because of the distortion in the photos and subsequent adjustments, the scale is variable along the benches, from bench to bench and from trench to trench for these overview mosaics.\r\n\r\nThis report serves principally as a repository for the overview photomosaics. Sheet 1 shows the overview mosaics for both walls of trenches 1 and 2 along with some linework including most of the fault traces, a prominent unconformity within the fluvial deposits and the larger bodies of liquefied sand. Sheet 2 shows the overview mosaics for the SE wall of trench 3 and the NW wall of trench 4 along with photomosaics of both walls of trench 7 and the SE wall of trench 6 that were complied from the rectified, large scale photos. No linework has been portrayed on these photomosaics. Sheet 3 shows the overview mosaics of both walls of trench 1 with the locations of detrital charcoal samples that were collected. A later version of this report will contain photomosaics for trenches 1 and 2 compiled from the individual, fully rectified photos covering each 1m by 0.5m area with detailed linework superimposed.\r\n\r\nThe trenches exposed a main, Holocene-active, fault zone about 5-12 m wide which juxtaposes Late Pleistocene (?) fluvial sand and gravel southwest of the fault against organic-rich, Holocene fine sand, silt and clay apparently deposited in a marsh. Most of the faults in the main zone appear to rupture to the ground surface making it impossible to resolve individual prehistoric earthquakes along this zone. However, the main fault zone is associated with a slight upwarp and growth strata associated with this folding has recorded evidence for at least 6 late-Holocene earthquakes. Deformation due to liquefaction is further evidence of large earthquakes at these horizons.\r\n\r\nThe fine-grained Holocene deposits contain abundant detrital charcoal. We have so far dated 36 samples from 20 stratigraphic layers. We used 27 of these dates in an Oxcal chronological model in order to constrain the ages of the six earthquakes. Too few samples have so far been dated from the uppermost horizons so the ages of the two youngest earthquakes recorded at the site are poorly constrained. However, it appears that the youngest sediment at the site was deposited about 2000 years ago and the thick surface soil indicate that the two youngest earthquake recorded at the site may be about this old. The radiocarbon dates provide good constraints on the ages of the four older earthquakes (Table 1). The ages of these four earthquakes suggest an aver","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Appendix O in The Uniform California Earthquake Rupture Forecast, Version 2 (UCERF 2)","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071437O","collaboration":"Prepared in cooperation with the California Geological Survey and the Southern California Earthquake Center","usgsCitation":"Fumal, T.E., and Kendrick, K., 2008, Paleoseismic Investigations of the Walnut Site on the San Jacinto Fault (Version 1.0): U.S. Geological Survey Open-File Report 2007-1437, 3 Plates: 108 x 36 inches or smaller, https://doi.org/10.3133/ofr20071437O.","productDescription":"3 Plates: 108 x 36 inches or smaller","costCenters":[{"id":234,"text":"Earthquake Hazards Program","active":true,"usgs":true},{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"links":[{"id":195113,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":11150,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2007/1437/o/","linkFileType":{"id":5,"text":"html"}}],"edition":"Version 1.0","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ae4e4b07f02db6899ce","contributors":{"authors":[{"text":"Fumal, T. E.","contributorId":25942,"corporation":false,"usgs":true,"family":"Fumal","given":"T.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":294418,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kendrick, K.J. 0000-0002-9839-6861","orcid":"https://orcid.org/0000-0002-9839-6861","contributorId":48595,"corporation":false,"usgs":true,"family":"Kendrick","given":"K.J.","affiliations":[],"preferred":false,"id":294419,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":81125,"text":"ofr20071437L - 2008 - Cascadia Subduction Zone","interactions":[],"lastModifiedDate":"2019-07-17T16:09:24","indexId":"ofr20071437L","displayToPublicDate":"2008-04-22T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1437","chapter":"L","title":"Cascadia Subduction Zone","docAbstract":"The geometry and recurrence times of large earthquakes associated with the Cascadia Subduction Zone (CSZ) were discussed and debated at a March 28-29, 2006 Pacific Northwest workshop for the USGS National Seismic Hazard Maps.\r\n\r\nThe CSZ is modeled from Cape Mendocino in California to Vancouver Island in British Columbia. We include the same geometry and weighting scheme as was used in the 2002 model (Frankel and others, 2002) based on thermal constraints (Fig. 1; Fluck and others, 1997 and a reexamination by Wang et al., 2003, Fig. 11, eastern edge of intermediate shading). This scheme includes four possibilities for the lower (eastern) limit of seismic rupture: the base of elastic zone (weight 0.1), the base of transition zone (weight 0.2), the midpoint of the transition zone (weight 0.2), and a model with a long north-south segment at 123.8? W in the southern and central portions of the CSZ, with a dogleg to the northwest in the northern portion of the zone (weight 0.5). The latter model was derived from the approximate average longitude of the contour of the 30 km depth of the CSZ as modeled by Fluck et al. (1997). A global study of the maximum depth of thrust earthquakes on subduction zones by Tichelaar and Ruff (1993) indicated maximum depths of about 40 km for most of the subduction zones studied, although the Mexican subduction zone had a maximum depth of about 25 km (R. LaForge, pers. comm., 2006). The recent inversion of GPS data by McCaffrey et al. (2007) shows a significant amount of coupling (a coupling factor of 0.2-0.3) as far east as 123.8? West in some portions of the CSZ. Both of these lines of evidence lend support to the model with a north-south segment at 123.8? W.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Appendix L in The Uniform California Earthquake Rupture Forecast, Version 2 (UCERF 2)","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"ENGLISH","publisher":"Geological Survey (U.S.)","doi":"10.3133/ofr20071437L","collaboration":"Prepared in cooperation with the California Geological Survey and the Southern California Earthquake Center","usgsCitation":"Frankel, A.D., and Petersen, M.D., 2008, Cascadia Subduction Zone (Version 1.0): U.S. Geological Survey Open-File Report 2007-1437, 7 p., https://doi.org/10.3133/ofr20071437L.","productDescription":"7 p.","costCenters":[{"id":234,"text":"Earthquake Hazards Program","active":true,"usgs":true},{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true},{"id":300,"text":"Geologic Hazards Science Center","active":true,"usgs":true}],"links":[{"id":195319,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":11147,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2007/1437/l/","linkFileType":{"id":5,"text":"html"}}],"edition":"Version 1.0","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49efe4b07f02db5edc46","contributors":{"authors":[{"text":"Frankel, Arthur D. 0000-0001-9119-6106 afrankel@usgs.gov","orcid":"https://orcid.org/0000-0001-9119-6106","contributorId":1363,"corporation":false,"usgs":true,"family":"Frankel","given":"Arthur","email":"afrankel@usgs.gov","middleInitial":"D.","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":false,"id":294414,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Petersen, Mark D. 0000-0001-8542-3990 mpetersen@usgs.gov","orcid":"https://orcid.org/0000-0001-8542-3990","contributorId":1163,"corporation":false,"usgs":true,"family":"Petersen","given":"Mark","email":"mpetersen@usgs.gov","middleInitial":"D.","affiliations":[{"id":300,"text":"Geologic Hazards Science Center","active":true,"usgs":true},{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":true,"id":294413,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":81121,"text":"ofr20071437I - 2008 - Calculating California seismicity rates","interactions":[],"lastModifiedDate":"2019-07-17T16:50:29","indexId":"ofr20071437I","displayToPublicDate":"2008-04-19T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1437","chapter":"I","title":"Calculating California seismicity rates","docAbstract":"Empirically the rate of earthquakes = magnitude M is well fit by the Gutenberg-Richter relationship, logN=a-bM (1) where N is the number of earthquakes = M over a given time period, a is the number of M = 0 earthquakes over the same period, and b is a parameter that determines the ratio of larger to smaller earthquakes (Ishimoto and Iida 1939; Gutenberg and Richter 1944). Thus to characterize the seismicity rate, N, and risk in a given region we need to solve for the values of a and b. Here we are concerned with solving for the long term average values of these parameters for the state of California. My primary data source is a catalog of 1850-2006 M = 4.0 seismicity compiled with Tianqing Cao (Appendix H). Because earthquakes outside of the state can influence California I consider both earthquakes within the state and within 100 km of the state border (Figure 1).","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Appendix I in The Uniform California Earthquake Rupture Forecast, Version 2 (UCERF 2)","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071437I","collaboration":"Prepared in cooperation with the California Geological Survey and the Southern California Earthquake Center","usgsCitation":"Felzer, K., 2008, Calculating California seismicity rates (Version 1.0): U.S. Geological Survey Open-File Report 2007-1437, iii, 41 p., https://doi.org/10.3133/ofr20071437I.","productDescription":"iii, 41 p.","costCenters":[{"id":234,"text":"Earthquake Hazards Program","active":true,"usgs":true},{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"links":[{"id":194993,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":11142,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2007/1437/i/","linkFileType":{"id":5,"text":"html"}}],"edition":"Version 1.0","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a07e4b07f02db5f974d","contributors":{"authors":[{"text":"Felzer, Karen R.","contributorId":40680,"corporation":false,"usgs":true,"family":"Felzer","given":"Karen R.","affiliations":[],"preferred":false,"id":294401,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":81115,"text":"ofr20071437C - 2008 - Monte Carlo method for determining earthquake recurrence parameters from short paleoseismic catalogs: Example calculations for California","interactions":[],"lastModifiedDate":"2019-07-17T16:54:13","indexId":"ofr20071437C","displayToPublicDate":"2008-04-19T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1437","chapter":"C","title":"Monte Carlo method for determining earthquake recurrence parameters from short paleoseismic catalogs: Example calculations for California","docAbstract":"Paleoearthquake observations often lack enough events at a given site to directly define a probability density function (PDF) for earthquake recurrence. Sites with fewer than 10-15 intervals do not provide enough information to reliably determine the shape of the PDF using standard maximum-likelihood techniques [e.g., Ellsworth et al., 1999]. In this paper I present a method that attempts to fit wide ranges of distribution parameters to short paleoseismic series. From repeated Monte Carlo draws, it becomes possible to quantitatively estimate most likely recurrence PDF parameters, and a ranked distribution of parameters is returned that can be used to assess uncertainties in hazard calculations. In tests on short synthetic earthquake series, the method gives results that cluster around the mean of the input distribution, whereas maximum likelihood methods return the sample means [e.g., NIST/SEMATECH, 2006]. For short series (fewer than 10 intervals), sample means tend to reflect the median of an asymmetric recurrence distribution, possibly leading to an overestimate of the hazard should they be used in probability calculations. Therefore a Monte Carlo approach may be useful for assessing recurrence from limited paleoearthquake records. Further, the degree of functional dependence among parameters like mean recurrence interval and coefficient of variation can be established. The method is described for use with time-independent and time-dependent PDF?s, and results from 19 paleoseismic sequences on strike-slip faults throughout the state of California are given.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Appendix C in The Uniform California Earthquake Rupture Forecast, Version 2 (UCERF 2)","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071437C","collaboration":"Prepared in cooperation with the California Geological Survey and the Southern California Earthquake Center","usgsCitation":"Parsons, T., 2008, Monte Carlo method for determining earthquake recurrence parameters from short paleoseismic catalogs: Example calculations for California (Version 1.0): U.S. Geological Survey Open-File Report 2007-1437, iii, 29 p., https://doi.org/10.3133/ofr20071437C.","productDescription":"iii, 29 p.","costCenters":[{"id":234,"text":"Earthquake Hazards Program","active":true,"usgs":true},{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"links":[{"id":195320,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":11136,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2007/1437/c/","linkFileType":{"id":5,"text":"html"}}],"edition":"Version 1.0","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a61e4b07f02db63578f","contributors":{"authors":[{"text":"Parsons, Tom 0000-0002-0582-4338","orcid":"https://orcid.org/0000-0002-0582-4338","contributorId":22056,"corporation":false,"usgs":true,"family":"Parsons","given":"Tom","affiliations":[{"id":520,"text":"Pacific Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":true,"id":294382,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":81117,"text":"ofr20071437E - 2008 - Overview of the Southern San Andreas Fault Model","interactions":[],"lastModifiedDate":"2019-07-17T16:52:08","indexId":"ofr20071437E","displayToPublicDate":"2008-04-19T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1437","chapter":"E","title":"Overview of the Southern San Andreas Fault Model","docAbstract":"This appendix summarizes the data and methodology used to generate the source model for the southern San Andreas fault. It is organized into three sections, 1) a section by section review of the geological data in the format of past Working Groups, 2) an overview of the rupture model, and 3) a manuscript by Biasi and Weldon (in review Bulletin of the Seismological Society of America) that describes the correlation methodology that was used to help develop the ?geologic insight? model. The goal of the Biasi and Weldon methodology is to quantify the insight that went into developing all A faults; as such it is in concept consistent with all other A faults but applied in a more quantitative way.\r\n\r\nThe most rapidly slipping fault and the only known source of M~8 earthquakes in southern California is the San Andreas fault. As such it plays a special role in the seismic hazard of California, and has received special attention in the current Working Group. The underlying philosophy of the current Working Group is to model the recurrence behavior of large, rapidly slipping faults like the San Andreas from observed data on the size, distribution and timing of past earthquakes with as few assumptions about underlying recurrence behavior as possible. In addition, we wish to carry the uncertainties in the data and the range of reasonable extrapolations from the data to the final model. To accomplish this for the Southern San Andreas fault we have developed an objective method to combine all of the observations of size, timing, and distribution of past earthquakes into a comprehensive set of earthquake scenarios that each represent a possible history of earthquakes for the past ~1400 years. The scenarios are then ranked according to their overall consistency with the data and then the frequencies of all of the ruptures permitted by the current Working Group?s segmentation model are calculated.\r\n\r\nWe also present 30-yr conditional probabilities by segment and compare to previous results. A distinctive aspect of the current model is that the probability is higher at both ends of the fault and that the ends have a much greater fraction of smaller events. There is a significant difference in the likelihood of large (M 7.7-8.0) earthquakes along the fault from north to south, with large 1857-like events common on the northern half of the southern San Andreas fault but relatively few M 7.7-8.0 expected on the southern half.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Appendix E in The Uniform California Earthquake Rupture Forecast, Version 2 (UCERF 2)","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071437E","collaboration":"Prepared in cooperation with the California Geological Survey and the Southern California Earthquake Center","usgsCitation":"Weldon, R.J., Biasi, G.P., Wills, C.J., and Dawson, T.E., 2008, Overview of the Southern San Andreas Fault Model (Version 1.0): U.S. Geological Survey Open-File Report 2007-1437, iii, 85 p., https://doi.org/10.3133/ofr20071437E.","productDescription":"iii, 85 p.","costCenters":[{"id":234,"text":"Earthquake Hazards Program","active":true,"usgs":true},{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"links":[{"id":195760,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":11138,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2007/1437/e/","linkFileType":{"id":5,"text":"html"}}],"edition":"Version 1.0","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ac9e4b07f02db67c543","contributors":{"authors":[{"text":"Weldon, Ray J. II","contributorId":47859,"corporation":false,"usgs":true,"family":"Weldon","given":"Ray","suffix":"II","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":294386,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Biasi, Glenn P.","contributorId":20436,"corporation":false,"usgs":true,"family":"Biasi","given":"Glenn","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":294384,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wills, Chris J.","contributorId":97576,"corporation":false,"usgs":true,"family":"Wills","given":"Chris","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":294387,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Dawson, Timothy E.","contributorId":24429,"corporation":false,"usgs":false,"family":"Dawson","given":"Timothy","email":"","middleInitial":"E.","affiliations":[{"id":7099,"text":"Calif. Geol. Survey","active":true,"usgs":false}],"preferred":false,"id":294385,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":81114,"text":"ofr20071437B - 2008 - Recurrence interval and event age data for Type A faults","interactions":[],"lastModifiedDate":"2019-07-17T16:54:50","indexId":"ofr20071437B","displayToPublicDate":"2008-04-19T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1437","chapter":"B","title":"Recurrence interval and event age data for Type A faults","docAbstract":"This appendix summarizes available recurrence interval, event age, and timing of most recent event data for Type A faults considered in the Earthquake Rate Model 2 (ERM 2) and used in the ERM 2 Appendix C analysis as well as Appendix N (time-dependent probabilities). These data have been compiled into an Excel workbook named Appendix B A-fault event ages_recurrence_V5.0 (herein referred to as the Appendix B workbook). For convenience, the Appendix B workbook is attached to the end of this document as a series of tables. The tables within the Appendix B workbook include site locations, event ages, and recurrence data, and in some cases, the interval of time between earthquakes is also reported. The Appendix B workbook is organized as individual worksheets, with each worksheet named by fault and paleoseismic site. Each worksheet contains the site location in latitude and longitude, as well as information on event ages, and a summary of recurrence data. Because the data has been compiled from different sources with different presentation styles, descriptions of the contents of each worksheet within the Appendix B spreadsheet are summarized.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Appendix B in The Uniform California Earthquake Rupture Forecast, Version 2 (UCERF 2)","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071437B","collaboration":"Prepared in cooperation with the California Geological Survey and the Southern California Earthquake Center","usgsCitation":"Dawson, T.E., Weldon, R.J., and Biasi, G.P., 2008, Recurrence interval and event age data for Type A faults (Version 1.0): U.S. Geological Survey Open-File Report 2007-1437, ii, 38 p., https://doi.org/10.3133/ofr20071437B.","productDescription":"ii, 38 p.","costCenters":[{"id":234,"text":"Earthquake Hazards Program","active":true,"usgs":true},{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"links":[{"id":195360,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":11135,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2007/1437/b/","linkFileType":{"id":5,"text":"html"}}],"edition":"Version 1.0","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a60e4b07f02db6354a5","contributors":{"authors":[{"text":"Dawson, Timothy E.","contributorId":24429,"corporation":false,"usgs":false,"family":"Dawson","given":"Timothy","email":"","middleInitial":"E.","affiliations":[{"id":7099,"text":"Calif. Geol. Survey","active":true,"usgs":false}],"preferred":false,"id":294380,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Weldon, Ray J. II","contributorId":47859,"corporation":false,"usgs":true,"family":"Weldon","given":"Ray","suffix":"II","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":294381,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Biasi, Glenn P.","contributorId":20436,"corporation":false,"usgs":true,"family":"Biasi","given":"Glenn","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":294379,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":81120,"text":"ofr20071437H - 2008 - WGCEP historical California earthquake catalog","interactions":[],"lastModifiedDate":"2019-07-17T16:51:01","indexId":"ofr20071437H","displayToPublicDate":"2008-04-19T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1437","chapter":"H","title":"WGCEP historical California earthquake catalog","docAbstract":"This appendix provides an earthquake catalog for California and the surrounding area. Our goal is to provide a listing for all known M > 5.5 earthquakes that occurred from 1850-1932 and all known M > 4.0 earthquakes that occurred from 1932-2006 within the region of 31.0 to 43.0 degrees North and -126.0 to -114.0 degrees West. Some pre-1932 earthquakes 4 < M < 5.5 are also listed. The completeness of the catalog varies strongly in time and space, in accordance with the locations of population centers and seismic instrumentation. The issue of catalog completeness is covered in depth in Appendix I, where seismicity rates are calculated for the state.\r\n\r\nThe state of California was sparsely populated until the gold rush began attracting waves of migrants in 1848. The regular publication of newspapers did not begin in many locations until 1849 and 1850. Consequently, while the historic occurrence of earthquakes in California has been documented back to the 1700s, the pre-1850 catalog is quite incomplete and most of the earthquakes are poorly constrained. Thus we list the pre-1850 earthquakes in this catalog, but for all seismicity rate calculations performed in Appendix I only the 1850-2006 part of the catalog is used. One known and significant pre-1850 earthquake that is not listed in this catalog is the MW9.0 Cascadia subduction zone earthquake of January 26, 1700 (Satake et al. 2003). This earthquake was primarily off the coast of Oregon and Washington, and we do not list it here because its epicenter may very well have been outside of the California region. Yet the southern tip of this earthquake did extend to Eureka. A repeat of this event could create both a substantial shaking and tsunami hazard in California. Other significant pre-1850 earthquakes, which are listed in the catalog below, include two earthquakes in December of 1812 in Southern California of roughly M 7; at least the first of the pair occurred on the San Andreas Fault (Toppozada et al. 2002), and a June 1838 earthquake that occurred on the San Andreas near San Francisco. Data on the 1838 earthquake is particularily sparse ? we do not even know the day on which it occurred - and magnitude estimates range from M 6.8 (Bakun 1999) to M 7.4 (Toppozada et al. 2002).\r\n\r\nEarthquake listings from 1850-1932 are generally solved for from historical data sources, with magnitudes and locations determined from felt and damage reports rather than from instrumentation. Most earthquake listings from 1932-2006 are based on instrumental recordings, at least in Southern California. The Northern California seismic network did not produce a full instrumental catalog until 1942 and did not begin routine calculation of magnitudes until late in the 1940s (Uhrhammer et al. 1996). Southern California processed some Northern California events, however, particularly with M > 5, before the Northern California network was online. Some earthquakes from 1900-1932, and particularly from 1910-1932 are also based on instrumental readings, but the quality of the instrumental record and the resulting analysis are much less precise than for later listings. A partial exception is for some of the largest earthquakes, such as the San Francisco earthquake of April 18, 1906, for which global teleseismic records (Wald et al. 1993) and geodetic measurements (Thatcher et al. 1906) have been used to help determine magnitudes.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Appendix H in The Uniform California Earthquake Rupture Forecast, Version 2 (UCERF 2)","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071437H","collaboration":"Prepared in cooperation with the California Geological Survey and the Southern California Earthquake Center","usgsCitation":"Felzer, K., and Cao, T., 2008, WGCEP historical California earthquake catalog (Version 1.0): U.S. Geological Survey Open-File Report 2007-1437, ii, 127 p., https://doi.org/10.3133/ofr20071437H.","productDescription":"ii, 127 p.","costCenters":[{"id":234,"text":"Earthquake Hazards Program","active":true,"usgs":true},{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"links":[{"id":195413,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":11141,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2007/1437/h/","linkFileType":{"id":5,"text":"html"}}],"edition":"Version 1.0","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4adae4b07f02db68585d","contributors":{"authors":[{"text":"Felzer, Karen R.","contributorId":40680,"corporation":false,"usgs":true,"family":"Felzer","given":"Karen R.","affiliations":[],"preferred":false,"id":294400,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cao, Tianqing","contributorId":27965,"corporation":false,"usgs":true,"family":"Cao","given":"Tianqing","email":"","affiliations":[],"preferred":false,"id":294399,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":81113,"text":"ofr20071437A - 2008 - California fault parameters for the National Seismic Hazard Maps and Working Group on California Earthquake Probabilities 2007","interactions":[],"lastModifiedDate":"2019-07-17T16:55:20","indexId":"ofr20071437A","displayToPublicDate":"2008-04-19T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1437","chapter":"A","title":"California fault parameters for the National Seismic Hazard Maps and Working Group on California Earthquake Probabilities 2007","docAbstract":"This report describes development of fault parameters for the 2007 update of the National Seismic Hazard Maps and the Working Group on California Earthquake Probabilities (WGCEP, 2007). These reference parameters are contained within a database intended to be a source of values for use by scientists interested in producing either seismic hazard or deformation models to better understand the current seismic hazards in California. These parameters include descriptions of the geometry and rates of movements of faults throughout the state. These values are intended to provide a starting point for development of more sophisticated deformation models which include known rates of movement on faults as well as geodetic measurements of crustal movement and the rates of movements of the tectonic plates. The values will be used in developing the next generation of the time-independent National Seismic Hazard Maps, and the time-dependant seismic hazard calculations being developed for the WGCEP. Due to the multiple uses of this information, development of these parameters has been coordinated between USGS, CGS and SCEC. SCEC provided the database development and editing tools, in consultation with USGS, Golden. This database has been implemented in Oracle and supports electronic access (e.g., for on-the-fly access). A GUI-based application has also been developed to aid in populating the database. Both the continually updated 'living' version of this database, as well as any locked-down official releases (e.g., used in a published model for calculating earthquake probabilities or seismic shaking hazards) are part of the USGS Quaternary Fault and Fold Database http://earthquake.usgs.gov/regional/qfaults/ . CGS has been primarily responsible for updating and editing of the fault parameters, with extensive input from USGS and SCEC scientists.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Appendix A in The Uniform California Earthquake Rupture Forecast, Version 2 (UCERF 2)","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071437A","collaboration":"Prepared in cooperation with the California Geological Survey and the Southern California Earthquake Center","usgsCitation":"Wills, C.J., Weldon, R.J., and Bryant, W., 2008, California fault parameters for the National Seismic Hazard Maps and Working Group on California Earthquake Probabilities 2007 (Version 1.0): U.S. Geological Survey Open-File Report 2007-1437, iii, 48 p., https://doi.org/10.3133/ofr20071437A.","productDescription":"iii, 48 p.","costCenters":[{"id":234,"text":"Earthquake Hazards Program","active":true,"usgs":true},{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"links":[{"id":190694,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":11134,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2007/1437/a/","linkFileType":{"id":5,"text":"html"}}],"edition":"Version 1.0","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49e6e4b07f02db5e7308","contributors":{"authors":[{"text":"Wills, Chris J.","contributorId":97576,"corporation":false,"usgs":true,"family":"Wills","given":"Chris","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":294378,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Weldon, Ray J. II","contributorId":47859,"corporation":false,"usgs":true,"family":"Weldon","given":"Ray","suffix":"II","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":294376,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bryant, W. A.","contributorId":56255,"corporation":false,"usgs":true,"family":"Bryant","given":"W. A.","affiliations":[],"preferred":false,"id":294377,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":81116,"text":"ofr20071437D - 2008 - Earthquake Rate Model 2 of the 2007 working group for California earthquake probabilities, magnitude-area relationships","interactions":[],"lastModifiedDate":"2019-07-17T16:53:42","indexId":"ofr20071437D","displayToPublicDate":"2008-04-19T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1437","chapter":"D","title":"Earthquake Rate Model 2 of the 2007 working group for California earthquake probabilities, magnitude-area relationships","docAbstract":"The Working Group for California Earthquake Probabilities must transform fault lengths and their slip rates into earthquake moment-magnitudes. First, the down-dip coseismic fault dimension, W, must be inferred. We have chosen the Nazareth and Hauksson (2004) method, which uses the depth above which 99% of the background seismicity occurs to assign W. The product of the observed or inferred fault length, L, with the down-dip dimension, W, gives the fault area, A. We must then use a scaling relation to relate A to moment-magnitude, Mw. We assigned equal weight to the Ellsworth B (Working Group on California Earthquake Probabilities, 2003) and Hanks and Bakun (2007) equations. The former uses a single logarithmic relation fitted to the M=6.5 portion of data of Wells and Coppersmith (1994); the latter uses a bilinear relation with a slope change at M=6.65 (A=537 km2) and also was tested against a greatly expanded dataset for large continental transform earthquakes. We also present an alternative power law relation, which fits the newly expanded Hanks and Bakun (2007) data best, and captures the change in slope that Hanks and Bakun attribute to a transition from area- to length-scaling of earthquake slip. We have not opted to use the alternative relation for the current model. The selections and weights were developed by unanimous consensus of the Executive Committee of the Working Group, following an open meeting of scientists, a solicitation of outside opinions from additional scientists, and presentation of our approach to the Scientific Review Panel. The magnitude-area relations and their assigned weights are unchanged from that used in Working Group (2003).","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Appendix D in The Uniform California Earthquake Rupture Forecast, Version 2 (UCERF 2)","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071437D","collaboration":"Prepared in cooperation with the California Geological Survey and the Southern California Earthquake Center","usgsCitation":"Stein, R.S., 2008, Earthquake Rate Model 2 of the 2007 working group for California earthquake probabilities, magnitude-area relationships (Version 1.0): U.S. Geological Survey Open-File Report 2007-1437, iii, 13 p., https://doi.org/10.3133/ofr20071437D.","productDescription":"iii, 13 p.","costCenters":[{"id":234,"text":"Earthquake Hazards Program","active":true,"usgs":true},{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"links":[{"id":195059,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":11137,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2007/1437/d/","linkFileType":{"id":5,"text":"html"}}],"edition":"Version 1.0","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a52e4b07f02db62ac37","contributors":{"authors":[{"text":"Stein, Ross S. 0000-0001-7586-3933 rstein@usgs.gov","orcid":"https://orcid.org/0000-0001-7586-3933","contributorId":2604,"corporation":false,"usgs":true,"family":"Stein","given":"Ross","email":"rstein@usgs.gov","middleInitial":"S.","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":true,"id":294383,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":81118,"text":"ofr20071437F - 2008 - Summary of geologic data and development of A Priori Rupture Models for the Elsinore, San Jacinto, and Garlock faults","interactions":[],"lastModifiedDate":"2019-07-17T16:51:33","indexId":"ofr20071437F","displayToPublicDate":"2008-04-19T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1437","chapter":"F","title":"Summary of geologic data and development of A Priori Rupture Models for the Elsinore, San Jacinto, and Garlock faults","docAbstract":"This appendix to the WGCEP Earthquake Rate Model 2 summarizes geologic data and documents the development of the rupture models for the Elsinore, San Jacinto, and Garlock faults. For the summary of available geologic data, the documentation is organized by fault and fault segment and includes a summary of slip rates, event timing and recurrence, slip-per-event, and historical seismicity for each segment. This information is compiled from the published literature as well as newer studies that have not yet been published. For the unpublished data, we either are familiar, having visited the paleoseismic sites, or participated in the data collection, or we have solicited the principal investigators at each site for their latest results. While these unpublished results are preliminary, we have chosen to include them because the results were considered in development of the rupture models and it is unlikely that the sites will be formally published before the WGCEP Earthquake Rate Model is finalized. The second part of this document describes the construction of the rupture models used in the WGCEP Earthquake Rate Model 2, and the rationale that went into the construction of these models, with a summary of what types of data were considered when the rupture models were created.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Appendix F in The Uniform California Earthquake Rupture Forecast, Version 2 (UCERF 2)","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071437F","collaboration":"Prepared in cooperation with the California Geological Survey and the Southern California Earthquake Center","usgsCitation":"Dawson, T.E., Rockwell, T., Weldon, R.J., and Wills, C.J., 2008, Summary of geologic data and development of A Priori Rupture Models for the Elsinore, San Jacinto, and Garlock faults (Version 1.0): U.S. Geological Survey Open-File Report 2007-1437, iii, 23 p., https://doi.org/10.3133/ofr20071437F.","productDescription":"iii, 23 p.","costCenters":[{"id":234,"text":"Earthquake Hazards Program","active":true,"usgs":true},{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"links":[{"id":190955,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":11139,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2007/1437/f/","linkFileType":{"id":5,"text":"html"}}],"edition":"Version 1.0","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b04e4b07f02db699156","contributors":{"authors":[{"text":"Dawson, Timothy E.","contributorId":24429,"corporation":false,"usgs":false,"family":"Dawson","given":"Timothy","email":"","middleInitial":"E.","affiliations":[{"id":7099,"text":"Calif. Geol. Survey","active":true,"usgs":false}],"preferred":false,"id":294388,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rockwell, Tom K.","contributorId":24448,"corporation":false,"usgs":true,"family":"Rockwell","given":"Tom K.","affiliations":[],"preferred":false,"id":294389,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Weldon, Ray J. II","contributorId":47859,"corporation":false,"usgs":true,"family":"Weldon","given":"Ray","suffix":"II","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":294390,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Wills, Chris J.","contributorId":97576,"corporation":false,"usgs":true,"family":"Wills","given":"Chris","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":294391,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":81112,"text":"ofr20071366 - 2008 - Sidescan-sonar imagery and surficial geologic interpretations of the sea floor in central Rhode Island Sound","interactions":[],"lastModifiedDate":"2026-01-21T17:17:06.498138","indexId":"ofr20071366","displayToPublicDate":"2008-04-19T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1366","title":"Sidescan-sonar imagery and surficial geologic interpretations of the sea floor in central Rhode Island Sound","docAbstract":"The U.S. Geological Survey (USGS) has been working with the National Oceanic and Atmospheric Administration (NOAA) to interpret the surficial geology of areas along the northeastern coast of the United States. During 2004, the NOAA Ship RUDE conducted Hydrographic Survey H11321 in Rhode Island Sound. This sidescan-sonar and bathymetry survey covers an area of 93 km? located 12 km southeast of Brenton Point, RI in water depths of 28-39 m (fig. 1). The purpose of this report is to delineate sea floor features and sedimentary environments of this area in central Rhode Island Sound using sidescan-sonar and bathymetric data from NOAA Survey H11321 and seismic-reflection data from a previous USGS field study (Needell and others, 1983a). This is important for the study of benthic habitats and provides a framework for future research.\r\n\r\nPrior work in this area includes the mapping of surface sediments and surficial geology. McMaster (1960) collected sediment samples from Rhode Island Sound and Narragansett Bay and mapped our study area as having a sandy sea floor. In addition, one sample of sand from the National Ocean Service (NOS) Hydrographic Database came from a location in the northeast part of our study area in 1939 (fig. 2; Poppe and others, 2003). McMaster and others (1968) used seismic-reflection profiles to map the locations of a cuesta of Cretaceous sediments crossing Rhode Island Sound and post-Cretaceous drainage channels. Knebel and others (1982) identified sedimentary environments in Rhode Island Sound using sidescan sonographs. Needell and others (1983b) studied the Quaternary geology and mapped the structure, sedimentary environments, and geologic hazards in Rhode Island Sound using sidescan-sonar and seismic-reflection data.\r\n\r\nSidescan-sonar and bathymetric data from NOAA Survey H11320, which overlaps the far eastern edge of our study area, was interpreted to consist of basins surrounded by a moraine and bathymetric highs composed of till with areas of rocks, sand waves, hummocks, glaciolacustrine erosional outliers, small scarps and elongate hills (fig. 1; McMullen and others, 2007). Some of those features extend into this study area.","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr20071366","usgsCitation":"McMullen, K., Poppe, L., Denny, J.F., Haupt, T., and Crocker, J., 2008, Sidescan-sonar imagery and surficial geologic interpretations of the sea floor in central Rhode Island Sound: U.S. Geological Survey Open-File Report 2007-1366, HTML Document, https://doi.org/10.3133/ofr20071366.","productDescription":"HTML Document","onlineOnly":"N","additionalOnlineFiles":"Y","ipdsId":"IP-005375","costCenters":[{"id":680,"text":"Woods Hole Science Center","active":false,"usgs":true}],"links":[{"id":11133,"rank":2,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2007/1366/","linkFileType":{"id":5,"text":"html"}},{"id":195186,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"}],"country":"United States","state":"Rhode Island","otherGeospatial":"Rhode Island Sound","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -71.1924005621173,\n 41.32000645194046\n ],\n [\n -71.23132449395086,\n 41.36550551149881\n ],\n [\n -71.3574577414124,\n 41.335916241348116\n ],\n [\n -71.31130742560995,\n 41.279659581423374\n ],\n [\n -71.1924005621173,\n 41.32000645194046\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","contact":"","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4adbe4b07f02db685ace","contributors":{"authors":[{"text":"McMullen, K. Y.","contributorId":51857,"corporation":false,"usgs":true,"family":"McMullen","given":"K.","middleInitial":"Y.","affiliations":[],"preferred":false,"id":294374,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Poppe, L. J.","contributorId":72782,"corporation":false,"usgs":true,"family":"Poppe","given":"L.","middleInitial":"J.","affiliations":[],"preferred":false,"id":294375,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Denny, J. 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We include four different classes of earthquake sources in the California background seismicity model: (1) gridded (smoothed) seismicity, (2) regional background zones, (3) special fault zone models, and (4) shear zones (also referred to as C zones). The gridded (smoothed) seismicity model, the regional background zone model, and the special fault zones use a declustered earthquake catalog for calculation of earthquake rates. Earthquake rates in shear zones are estimated from the geodetically determined rate of deformation across an area of high strain rate. We use a truncated exponential (Gutenberg-Richter, 1944) magnitude-frequency distribution to account for earthquakes in the background models.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Appendix J in The Uniform California Earthquake Rupture Forecast, Version 2 (UCERF 2)","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071437J","collaboration":"Prepared in cooperation with the California Geological Survey and the Southern California Earthquake Center","usgsCitation":"Petersen, M.D., Mueller, C.S., Frankel, A.D., and Zeng, Y., 2008, Spatial seismicity rates and maximum magnitudes for background earthquakes (Version 1.0): U.S. Geological Survey Open-File Report 2007-1437, iii, 8 p., https://doi.org/10.3133/ofr20071437J.","productDescription":"iii, 8 p.","costCenters":[{"id":234,"text":"Earthquake Hazards Program","active":true,"usgs":true},{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true},{"id":300,"text":"Geologic Hazards Science Center","active":true,"usgs":true}],"links":[{"id":195187,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":11143,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2007/1437/j/","linkFileType":{"id":5,"text":"html"}}],"edition":"Version 1.0","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49e5e4b07f02db5e70ed","contributors":{"authors":[{"text":"Petersen, Mark D. 0000-0001-8542-3990 mpetersen@usgs.gov","orcid":"https://orcid.org/0000-0001-8542-3990","contributorId":1163,"corporation":false,"usgs":true,"family":"Petersen","given":"Mark","email":"mpetersen@usgs.gov","middleInitial":"D.","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true},{"id":300,"text":"Geologic Hazards Science Center","active":true,"usgs":true}],"preferred":true,"id":294403,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mueller, Charles S. 0000-0002-1868-9710 cmueller@usgs.gov","orcid":"https://orcid.org/0000-0002-1868-9710","contributorId":955,"corporation":false,"usgs":true,"family":"Mueller","given":"Charles","email":"cmueller@usgs.gov","middleInitial":"S.","affiliations":[{"id":300,"text":"Geologic Hazards Science Center","active":true,"usgs":true}],"preferred":false,"id":294402,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Frankel, Arthur D. 0000-0001-9119-6106 afrankel@usgs.gov","orcid":"https://orcid.org/0000-0001-9119-6106","contributorId":1363,"corporation":false,"usgs":true,"family":"Frankel","given":"Arthur","email":"afrankel@usgs.gov","middleInitial":"D.","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":false,"id":294404,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Zeng, Yuehua zeng@usgs.gov","contributorId":1623,"corporation":false,"usgs":true,"family":"Zeng","given":"Yuehua","email":"zeng@usgs.gov","affiliations":[{"id":300,"text":"Geologic Hazards Science Center","active":true,"usgs":true}],"preferred":false,"id":294405,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":81119,"text":"ofr20071437G - 2008 - Development of final a-fault rupture models for WGCEP/ NSHMP Earthquake Rate Model 2","interactions":[],"lastModifiedDate":"2019-07-17T16:12:11","indexId":"ofr20071437G","displayToPublicDate":"2008-04-19T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1437","chapter":"G","title":"Development of final a-fault rupture models for WGCEP/ NSHMP Earthquake Rate Model 2","docAbstract":"This appendix discusses how we compute the magnitude and rate of earthquake ruptures for the seven Type-A faults (Elsinore, Garlock, San Jacinto, S. San Andreas, N. San Andreas, Hayward-Rodgers Creek, and Calaveras) in the WGCEP/NSHMP Earthquake Rate Model 2 (referred to as ERM 2. hereafter). By definition, Type-A faults are those that have relatively abundant paleoseismic information (e.g., mean recurrence-interval estimates). The first section below discusses segmentation-based models, where ruptures are assumed be confined to one or more identifiable segments. The second section discusses an un-segmented-model option, the third section discusses results and implications, and we end with a discussion of possible future improvements. General background information can be found in the main report.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Appendix G in The Uniform California Earthquake Rupture Forecast, Version 2 (UCERF 2)","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071437G","collaboration":"Prepared in cooperation with the California Geological Survey and the Southern California Earthquake Center","usgsCitation":"Field, E.H., Weldon, R.J., Parsons, T., Wills, C.J., Dawson, T.E., Stein, R.S., and Petersen, M.D., 2008, Development of final a-fault rupture models for WGCEP/ NSHMP Earthquake Rate Model 2 (Version 1.0): U.S. Geological Survey Open-File Report 2007-1437, iii, 59 p., https://doi.org/10.3133/ofr20071437G.","productDescription":"iii, 59 p.","costCenters":[{"id":234,"text":"Earthquake Hazards Program","active":true,"usgs":true},{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true},{"id":300,"text":"Geologic Hazards Science Center","active":true,"usgs":true}],"links":[{"id":11140,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2007/1437/g/","linkFileType":{"id":5,"text":"html"}},{"id":195708,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"}],"edition":"Version 1.0","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4aa7e4b07f02db6671c2","contributors":{"authors":[{"text":"Field, Edward H. 0000-0001-8172-7882 field@usgs.gov","orcid":"https://orcid.org/0000-0001-8172-7882","contributorId":52242,"corporation":false,"usgs":true,"family":"Field","given":"Edward","email":"field@usgs.gov","middleInitial":"H.","affiliations":[{"id":300,"text":"Geologic Hazards Science Center","active":true,"usgs":true}],"preferred":true,"id":294397,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Weldon, Ray J. 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The first set of 100 sites was compiled by A.A. Bullock in the Lawson (1908) report on the 1906 San Francisco earthquake. The second set of 45 sites was compiled by Toppozada et al. (1981) from an extensive search of newspaper archives. We supplemented these two sets of reports with new observations from 30 sites using surveys of cemetery damage, reports of damage to historic adobe structures, pioneer narratives, and reports from newspapers that Toppozada et al. (1981) did not retrieve. The Lawson (1908) and Toppozada et al. 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Public safety demands credible assessments of the earthquake hazard to maintain appropriate building codes for safe construction and earthquake insurance for loss protection. Seismic hazard analysis begins with an earthquake rupture forecast?a model of probabilities that earthquakes of specified magnitudes, locations, and faulting types will occur during a specified time interval. This report describes a new earthquake rupture forecast for California developed by the 2007 Working Group on California Earthquake Probabilities (WGCEP 2007).","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071437","collaboration":"Prepared in cooperation with the California Geological Survey and the Southern California Earthquake Center","usgsCitation":"2007 Working Group on California Earthquake Probabilities, 2008, The Uniform California Earthquake Rupture Forecast, version 2 (UCERF 2) (Version 1.0): U.S. Geological Survey Open-File Report 2007-1437, Executive Summary; Report; Excel Workbook; 16 Appendixes, https://doi.org/10.3133/ofr20071437.","productDescription":"Executive Summary; Report; Excel Workbook; 16 Appendixes","onlineOnly":"N","additionalOnlineFiles":"Y","costCenters":[{"id":234,"text":"Earthquake Hazards Program","active":true,"usgs":true},{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true},{"id":300,"text":"Geologic Hazards Science Center","active":true,"usgs":true}],"links":[{"id":11125,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2007/1437/","linkFileType":{"id":5,"text":"html"}},{"id":195691,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"}],"geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -124.25,32 ], [ -124.25,42 ], [ -114,42 ], [ -114,32 ], [ -124.25,32 ] ] ] } } ] }","edition":"Version 1.0","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4abce4b07f02db672e8e","contributors":{"authors":[{"text":"2007 Working Group on California Earthquake Probabilities","contributorId":128263,"corporation":true,"usgs":false,"organization":"2007 Working Group on California Earthquake Probabilities","id":534957,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":81104,"text":"ofr20081006 - 2008 - Publications of the Volcano Hazards Program 2006","interactions":[],"lastModifiedDate":"2019-03-27T10:55:48","indexId":"ofr20081006","displayToPublicDate":"2008-04-16T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2008-1006","title":"Publications of the Volcano Hazards Program 2006","docAbstract":"The Volcano Hazards Program of the U.S. Geological Survey (USGS) is part of the Geologic Hazards Assessments subactivity as funded by Congressional appropriation. Investigations are carried out in the Geology and Hydrology Disciplines of the USGS and with cooperators at the Alaska Division of Geological and Geophysical Surveys, University of Alaska Fairbanks Geophysical Institute, University of Hawaii Hilo, University of Utah, and University of Washington Geophysics Program. This report lists publications from all these institutions.\r\n\r\nThis report contains only published papers and maps; numerous abstracts produced for presentations at scientific meetings have not been included. Publications are included based on date of publication with no attempt to assign them to Fiscal Year.","language":"ENGLISH","publisher":"Geological Survey (U.S.)","doi":"10.3133/ofr20081006","usgsCitation":"Nathenson, M., 2008, Publications of the Volcano Hazards Program 2006 (Version 1.0): U.S. Geological Survey Open-File Report 2008-1006, 12 p., https://doi.org/10.3133/ofr20081006.","productDescription":"12 p.","onlineOnly":"Y","costCenters":[{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true}],"links":[{"id":195432,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":11124,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2008/1006/","linkFileType":{"id":5,"text":"html"}}],"edition":"Version 1.0","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4aa9e4b07f02db667ec0","contributors":{"authors":[{"text":"Nathenson, Manuel 0000-0002-5216-984X mnathnsn@usgs.gov","orcid":"https://orcid.org/0000-0002-5216-984X","contributorId":1358,"corporation":false,"usgs":true,"family":"Nathenson","given":"Manuel","email":"mnathnsn@usgs.gov","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":294355,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":81103,"text":"ofr20081100 - 2008 - Modeling Soil Moisture in the Mojave Desert","interactions":[],"lastModifiedDate":"2012-02-02T00:14:24","indexId":"ofr20081100","displayToPublicDate":"2008-04-16T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2008-1100","title":"Modeling Soil Moisture in the Mojave Desert","docAbstract":"The Mojave Desert is an arid region of southeastern California and parts of Nevada, Arizona, and Utah; the desert occupies more than 25,000 square miles (fig. 1). Ranging from below sea level to over 5,000 feet (1,524 m) in elevation, the Mojave Desert is considered a ?high desert.? On the west and southwest it is bounded by the Sierra Nevada, the San Gabriel, and the San Bernardino Mountains. These imposing mountains intercept moisture traveling inland from the Pacific Ocean, producing arid conditions characterized by extreme fluctuations in daily temperatures, strong seasonal winds, and an average annual precipitation of less than six inches. The Mojave Desert lies farther south and at a lower elevation than the cooler Great Basin Desert and grades southward into the even lower and hotter Sonoran Desert.","language":"ENGLISH","publisher":"Geological Survey (U.S.)","doi":"10.3133/ofr20081100","collaboration":"Prepared in cooperation with the National Park Service","usgsCitation":"Miller, D., Hughson, D., and Schmidt, K.M., 2008, Modeling Soil Moisture in the Mojave Desert (Version 1.0): U.S. Geological Survey Open-File Report 2008-1100, 6 p., https://doi.org/10.3133/ofr20081100.","productDescription":"6 p.","onlineOnly":"Y","costCenters":[{"id":647,"text":"Western Earth Surface Processes","active":false,"usgs":true}],"links":[{"id":195781,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":11123,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2008/1100/","linkFileType":{"id":5,"text":"html"}}],"edition":"Version 1.0","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a28e4b07f02db6112b4","contributors":{"authors":[{"text":"Miller, David M. 0000-0003-3711-0441 dmiller@usgs.gov","orcid":"https://orcid.org/0000-0003-3711-0441","contributorId":1707,"corporation":false,"usgs":true,"family":"Miller","given":"David M.","email":"dmiller@usgs.gov","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":false,"id":294352,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hughson, Debra","contributorId":70506,"corporation":false,"usgs":true,"family":"Hughson","given":"Debra","affiliations":[],"preferred":false,"id":294354,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Schmidt, Kevin M. 0000-0003-2365-8035 kschmidt@usgs.gov","orcid":"https://orcid.org/0000-0003-2365-8035","contributorId":1985,"corporation":false,"usgs":true,"family":"Schmidt","given":"Kevin","email":"kschmidt@usgs.gov","middleInitial":"M.","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":294353,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":81102,"text":"ofr20081091 - 2008 - Major and EDXRF Trace Element Chemical Analyses of Volcanic Rocks from Lassen Volcanic National Park and Vicinity, California","interactions":[],"lastModifiedDate":"2019-03-07T09:32:17","indexId":"ofr20081091","displayToPublicDate":"2008-04-16T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2008-1091","title":"Major and EDXRF Trace Element Chemical Analyses of Volcanic Rocks from Lassen Volcanic National Park and Vicinity, California","docAbstract":"This open-file report presents WDXRF major-element chemical data for late Pliocene to Holocene volcanic rocks collected from Lassen Volcanic National Park and vicinity, California. Data for Rb, Sr, Ba, Y, Zr, Nb, Ni, Cr, Zn and Cu obtained by EDXRF are included for many samples. Data are presented in an EXCEL spreadsheet and are keyed to rock units as displayed on the Geologic Map of Lassen Volcanic National Park and vicinity (Clynne and Muffler, in press). Location of the samples is given in latitude and longitude in degrees and decimal minutes and in decimal degrees.","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr20081091","usgsCitation":"Clynne, M.A., Muffler, L., Siems, D.F., Taggart, J., and Bruggman, P., 2008, Major and EDXRF Trace Element Chemical Analyses of Volcanic Rocks from Lassen Volcanic National Park and Vicinity, California (Version 1.0): U.S. Geological Survey Open-File Report 2008-1091, Text: 10 p.; Table (available as Excel, CSV, TXT, and PDF file), https://doi.org/10.3133/ofr20081091.","productDescription":"Text: 10 p.; Table (available as Excel, CSV, TXT, and PDF file)","onlineOnly":"Y","additionalOnlineFiles":"Y","costCenters":[{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true}],"links":[{"id":195230,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":11122,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2008/1091/","linkFileType":{"id":5,"text":"html"}}],"geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -121.75,40.25 ], [ -121.75,40.75 ], [ -121.11749999999999,40.75 ], [ -121.11749999999999,40.25 ], [ -121.75,40.25 ] ] ] } } ] }","edition":"Version 1.0","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a80e4b07f02db6496fe","contributors":{"authors":[{"text":"Clynne, Michael A. 0000-0002-4220-2968 mclynne@usgs.gov","orcid":"https://orcid.org/0000-0002-4220-2968","contributorId":2032,"corporation":false,"usgs":true,"family":"Clynne","given":"Michael","email":"mclynne@usgs.gov","middleInitial":"A.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":294347,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Muffler, L.J.P.","contributorId":63383,"corporation":false,"usgs":true,"family":"Muffler","given":"L.J.P.","affiliations":[],"preferred":false,"id":294350,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Siems, D. F.","contributorId":101239,"corporation":false,"usgs":true,"family":"Siems","given":"D.","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":294351,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Taggart, J.E. Jr.","contributorId":51301,"corporation":false,"usgs":true,"family":"Taggart","given":"J.E.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":294349,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Bruggman, Peggy","contributorId":9737,"corporation":false,"usgs":true,"family":"Bruggman","given":"Peggy","email":"","affiliations":[],"preferred":false,"id":294348,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":81095,"text":"ofr20081132 - 2008 - Geochemical data for samples collected in 2007 near the concealed pebble porphyry Cu-Au-Mo deposit, southwest Alaska","interactions":[{"subject":{"id":81095,"text":"ofr20081132 - 2008 - Geochemical data for samples collected in 2007 near the concealed pebble porphyry Cu-Au-Mo deposit, southwest Alaska","indexId":"ofr20081132","publicationYear":"2008","noYear":false,"title":"Geochemical data for samples collected in 2007 near the concealed pebble porphyry Cu-Au-Mo deposit, southwest Alaska"},"predicate":"SUPERSEDED_BY","object":{"id":70004631,"text":"ds608 - 2011 - Geophysical, geochemical, and mineralogical data from the Pebble Cu-Au-Mo porphyry deposit area, southwest Alaska: Contributions to assessment techniques for concealed mineral resources","indexId":"ds608","publicationYear":"2011","noYear":false,"title":"Geophysical, geochemical, and mineralogical data from the Pebble Cu-Au-Mo porphyry deposit area, southwest Alaska: Contributions to assessment techniques for concealed mineral resources"},"id":1}],"supersededBy":{"id":70004631,"text":"ds608 - 2011 - Geophysical, geochemical, and mineralogical data from the Pebble Cu-Au-Mo porphyry deposit area, southwest Alaska: Contributions to assessment techniques for concealed mineral resources","indexId":"ds608","publicationYear":"2011","noYear":false,"title":"Geophysical, geochemical, and mineralogical data from the Pebble Cu-Au-Mo porphyry deposit area, southwest Alaska: Contributions to assessment techniques for concealed mineral resources"},"lastModifiedDate":"2019-08-16T06:40:33","indexId":"ofr20081132","displayToPublicDate":"2008-04-15T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2008-1132","title":"Geochemical data for samples collected in 2007 near the concealed pebble porphyry Cu-Au-Mo deposit, southwest Alaska","docAbstract":"In the summer of 2007, the U.S. Geological Survey (USGS) began an exploration geochemical research study over the Pebble porphyry copper-gold-molydenum (Cu-Au-Mo) deposit in southwest Alaska. The Pebble deposit is extremely large and is almost entirely concealed by tundra, glacial deposits, and post-Cretaceous volcanic and volcaniclastic rocks. The deposit is presently being explored by Northern Dynasty Minerals, Ltd., and Anglo-American LLC. The USGS undertakes unbiased, broad-scale mineral resource assessments of government lands to provide Congress and citizens with information on national mineral endowment. Research on known deposits is also done to refine and better constrain methods and deposit models for the mineral resource assessments. The Pebble deposit was chosen for this study because it is concealed by surficial cover rocks, it is relatively undisturbed (except for exploration company drill holes), it is a large mineral system, and it is fairly well constrained at depth by the drill hole geology and geochemistry. The goals of the USGS study are (1) to determine whether the concealed deposit can be detected with surface samples, (2) to better understand the processes of metal migration from the deposit to the surface, and (3) to test and develop methods for assessing mineral resources in similar concealed terrains.\r\n\r\nThis report presents analytical results for geochemical samples collected in 2007 from the Pebble deposit and surrounding environs. The analytical data are presented digitally both as an integrated Microsoft 2003 Access? database and as Microsoft 2003 Excel? files.\r\n\r\nThe Pebble deposit is located in southwestern Alaska on state lands about 30 km (18 mi) northwest of the village of Illiamna and 320 km (200 mi) southwest of Anchorage (fig. 1). Elevations in the Pebble area range from 287 m (940 ft) at Frying Pan Lake just south of the deposit to 1146 m (3760 ft) on Kaskanak Mountain about 5 km (5 mi) to the west. The deposit is in an area of relatively subdued topographic relief with an elevation of around 300 m (1000 ft). This portion of Alaska is part of the subarctic regime mountains division, Yukon intermontane plateaus-tayga-meadow province ecoregion, as defined by Bailey (U.S. Forest Service, 2007).\r\n\r\nBetween June 28th and July 12th, 2007, scientists from the USGS collected soil, water, stream sediment, vegetation, heavy-mineral concentrate, till, and rock samples from the deposit area. This report contains analytical results for soil, water, stream sediment, and vegetation samples. Analyses for the heavy-mineral concentrate, till, and rock samples are still in progress. The sampling was undertaken during relatively dry and stable weather conditions. Only minor scattered rain showers occurred during the sampling period, so surface conditions were largely unaffected by weather. The predominant sample media collected were soils and surface waters. Soil and water (mostly from ponds and springs, some from small creeks) samples were collected along a single 7.8 km-long (4.8 mi) east-west traverse across the Pebble East and Pebble West zones and from more distal background areas around Koktuli and Kaskanak Mountains. Sample sites are shown on figure 2 and plate 1, and locality coordinates are provided in the accompanying Access and Excel files named FieldSite.\r\n\r\nWater samples were analyzed by USGS laboratories with one subset analyzed by Activation Laboratories (Actlabs), as indicated below. Soils and stream sediments were analyzed for their total content by SGS Minerals Services under a contract with the USGS. Soil samples were also leached by selected partial-extraction leaching procedures and then analyzed by several commercial laboratories, as described below. Vegetation samples were analyzed as indicated below.","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20081132","usgsCitation":"Fey, D.L., Granitto, M., Giles, S.A., Smith, S.M., Eppinger, R.G., and Kelley, K., 2008, Geochemical data for samples collected in 2007 near the concealed pebble porphyry Cu-Au-Mo deposit, southwest Alaska: U.S. Geological Survey Open-File Report 2008-1132, v, 153 p., https://doi.org/10.3133/ofr20081132.","productDescription":"v, 153 p.","additionalOnlineFiles":"Y","costCenters":[{"id":595,"text":"U.S. Geological Survey","active":false,"usgs":true}],"links":[{"id":190638,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":10964,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2008/1132/","linkFileType":{"id":5,"text":"html"}}],"country":"United States","state":"Alaska","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -157.5,59 ], [ -157.5,62 ], [ -148,62 ], [ -148,59 ], [ -157.5,59 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b24e4b07f02db6ae9c5","contributors":{"authors":[{"text":"Fey, David L. dfey@usgs.gov","contributorId":713,"corporation":false,"usgs":true,"family":"Fey","given":"David","email":"dfey@usgs.gov","middleInitial":"L.","affiliations":[{"id":35995,"text":"Geology, Geophysics, and Geochemistry Science Center","active":true,"usgs":true}],"preferred":true,"id":294318,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Granitto, Matthew 0000-0003-3445-4863 granitto@usgs.gov","orcid":"https://orcid.org/0000-0003-3445-4863","contributorId":1224,"corporation":false,"usgs":true,"family":"Granitto","given":"Matthew","email":"granitto@usgs.gov","affiliations":[{"id":171,"text":"Central Mineral and Environmental Resources Science Center","active":true,"usgs":true},{"id":387,"text":"Mineral Resources Program","active":true,"usgs":true}],"preferred":true,"id":294320,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Giles, Stuart A. 0000-0002-8696-5078 sgiles@usgs.gov","orcid":"https://orcid.org/0000-0002-8696-5078","contributorId":1233,"corporation":false,"usgs":true,"family":"Giles","given":"Stuart","email":"sgiles@usgs.gov","middleInitial":"A.","affiliations":[{"id":171,"text":"Central Mineral and Environmental Resources Science Center","active":true,"usgs":true},{"id":387,"text":"Mineral Resources Program","active":true,"usgs":true}],"preferred":true,"id":294321,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Smith, Steven M. 0000-0003-3591-5377 smsmith@usgs.gov","orcid":"https://orcid.org/0000-0003-3591-5377","contributorId":1460,"corporation":false,"usgs":true,"family":"Smith","given":"Steven","email":"smsmith@usgs.gov","middleInitial":"M.","affiliations":[{"id":171,"text":"Central Mineral and Environmental Resources Science Center","active":true,"usgs":true},{"id":387,"text":"Mineral Resources Program","active":true,"usgs":true}],"preferred":true,"id":294322,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Eppinger, Robert G. eppinger@usgs.gov","contributorId":849,"corporation":false,"usgs":true,"family":"Eppinger","given":"Robert","email":"eppinger@usgs.gov","middleInitial":"G.","affiliations":[{"id":171,"text":"Central Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":294319,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Kelley, Karen D. 0000-0002-3232-5809","orcid":"https://orcid.org/0000-0002-3232-5809","contributorId":57817,"corporation":false,"usgs":true,"family":"Kelley","given":"Karen D.","affiliations":[],"preferred":false,"id":294323,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":81096,"text":"ofr20081143 - 2008 - Preliminary Toxicological Analysis of the Effect of Coal Slurry Impoundment Water on Human Liver Cells","interactions":[],"lastModifiedDate":"2012-02-02T00:14:16","indexId":"ofr20081143","displayToPublicDate":"2008-04-15T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2008-1143","title":"Preliminary Toxicological Analysis of the Effect of Coal Slurry Impoundment Water on Human Liver Cells","docAbstract":"Coal is usually 'washed' with water and a variety of chemicals to reduce its content of sulfur and mineral matter. The 'washings' or 'coal slurry' derived from this process is a viscous black liquid containing fine particles of coal, mineral matter, and other dissolved and particulate substances. Coal slurry may be stored in impoundments or in abandoned underground mines.\r\n\r\nHuman health and environmental effects potentially resulting from leakage of chemical substances from coal slurry into drinking water supplies or aquatic ecosystems have not been systematically examined. Impoundments are semipermeable, presenting the possibility that inorganic and organic substances, some of which may be toxic, may contaminate ground or surface water. The Agency for Toxic Substances and Disease Registry, part of the Centers for Disease Control and Prevention, has concluded that well water in Mingo County, West Virginia, constitutes a public health hazard.","language":"ENGLISH","publisher":"Geological Survey (U.S.)","doi":"10.3133/ofr20081143","usgsCitation":"Bunnell, J.E., 2008, Preliminary Toxicological Analysis of the Effect of Coal Slurry Impoundment Water on Human Liver Cells (Version 1.1, Revised Oct 2008): U.S. Geological Survey Open-File Report 2008-1143, Report: iii, 7 p., https://doi.org/10.3133/ofr20081143.","productDescription":"Report: iii, 7 p.","onlineOnly":"Y","costCenters":[{"id":595,"text":"U.S. Geological Survey","active":false,"usgs":true}],"links":[{"id":190754,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":10965,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2008/1143/","linkFileType":{"id":5,"text":"html"}}],"edition":"Version 1.1, Revised Oct 2008","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4acce4b07f02db67e448","contributors":{"authors":[{"text":"Bunnell, Joseph E. jbunnell@usgs.gov","contributorId":556,"corporation":false,"usgs":true,"family":"Bunnell","given":"Joseph","email":"jbunnell@usgs.gov","middleInitial":"E.","affiliations":[],"preferred":true,"id":294324,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":81088,"text":"ofr20081084 - 2008 - Traveltime data for the Truckee River between Tahoe City, California, and Vista, Nevada, 2006 and 2007","interactions":[],"lastModifiedDate":"2024-01-12T20:29:05.567445","indexId":"ofr20081084","displayToPublicDate":"2008-04-10T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2008-1084","title":"Traveltime data for the Truckee River between Tahoe City, California, and Vista, Nevada, 2006 and 2007","docAbstract":"Traveltime measurements were made during 2006 and 2007 along the Truckee River between Tahoe City, Calif., and Vista, Nev. Fluorescent rhodamine WT dye was injected at various locations along the river during streamflows ranging from 143 to 2,660 cubic feet per second.
The resulting data, presented in tabular and graphic form, may be useful to water-quality modelers or water-resources managers concerned with predicting the movement of soluble contaminants accidentally spilled into the Truckee River. The data provided in this report also could be used to determine the dispersion-related characteristics (duration and magnitude of pollutant concentrations) that may be expected in the Truckee River.
","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr20081084","collaboration":"Prepared in cooperation with the Truckee Meadows Water Authority","usgsCitation":"Crompton, E.J., 2008, Traveltime data for the Truckee River between Tahoe City, California, and Vista, Nevada, 2006 and 2007: U.S. Geological Survey Open-File Report 2008-1084, iv, 12 p., https://doi.org/10.3133/ofr20081084.","productDescription":"iv, 12 p.","temporalStart":"2006-01-01","temporalEnd":"2007-12-31","costCenters":[{"id":465,"text":"Nevada Water Science Center","active":true,"usgs":true}],"links":[{"id":10957,"rank":2,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2008/1084/","linkFileType":{"id":5,"text":"html"}},{"id":194586,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":424388,"rank":3,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_83509.htm","linkFileType":{"id":5,"text":"html"}}],"country":"United States","state":"California, Nevada","city":"Tahoe City, Vista","otherGeospatial":"Truckee River","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -119.6833,\n 39.5333\n ],\n [\n -120.3,\n 39.5333\n ],\n [\n -120.3,\n 39.15\n ],\n [\n -119.6833,\n 39.15\n ],\n [\n -119.6833,\n 39.5333\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a4ce4b07f02db6269e1","contributors":{"authors":[{"text":"Crompton, E. James","contributorId":78771,"corporation":false,"usgs":true,"family":"Crompton","given":"E.","email":"","middleInitial":"James","affiliations":[],"preferred":false,"id":294291,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":81089,"text":"ofr20081096 - 2008 - Methods and sources of data used to develop selected water-quality indicators for streams and ground water for EPA's 2007 Report on the Environment: Science report","interactions":[],"lastModifiedDate":"2022-06-16T19:46:39.307902","indexId":"ofr20081096","displayToPublicDate":"2008-04-10T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2008-1096","title":"Methods and sources of data used to develop selected water-quality indicators for streams and ground water for EPA's 2007 Report on the Environment: Science report","docAbstract":"The U.S. Geological Survey (USGS) was one of numerous governmental agencies, private organizations, and the academic community that provided data and interpretations for the U.S. Environmental Protection Agency’s (USEPA) 2007 Report on the Environment: Science Report. This report documents the sources of data and methods used to develop selected water–quality indicators for the 2007 edition of the report compiled by USEPA. Stream and ground–water–quality data collected nationally in a consistent manner as part of the USGS’s National Water–Quality Assessment Program (NAWQA) were provided for several water–quality indicators, including Nitrogen and Phosphorus in Streams in Agricultural Watersheds; Pesticides in Streams in Agricultural Watersheds; and Nitrate and Pesticides in Shallow Ground Water in Agricultural Watersheds. In addition, the USGS provided nitrate (nitrate plus nitrite) and phosphorus riverine load estimates calculated from water–quality and streamflow data collected as part of its National Stream Water Quality Accounting Network (NASQAN) and its Federal–State Cooperative Program for the Nitrogen and Phosphorus Discharge from Large Rivers indicator.
","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr20081096","usgsCitation":"Baker, N.T., Wilson, J.T., and Moran, M.J., 2008, Methods and sources of data used to develop selected water-quality indicators for streams and ground water for EPA's 2007 Report on the Environment: Science report: U.S. Geological Survey Open-File Report 2008-1096, Report: vi, 23 p.; Table; 11 Appendices, https://doi.org/10.3133/ofr20081096.","productDescription":"Report: vi, 23 p.; Table; 11 Appendices","onlineOnly":"Y","additionalOnlineFiles":"Y","costCenters":[{"id":451,"text":"National Water Quality Assessment Program","active":true,"usgs":true}],"links":[{"id":195106,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":402298,"rank":2,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_83515.htm","linkFileType":{"id":5,"text":"html"}},{"id":10958,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2008/1096/","linkFileType":{"id":5,"text":"html"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a51e4b07f02db62a074","contributors":{"authors":[{"text":"Baker, Nancy T. 0000-0002-7979-5744 ntbaker@usgs.gov","orcid":"https://orcid.org/0000-0002-7979-5744","contributorId":1955,"corporation":false,"usgs":true,"family":"Baker","given":"Nancy","email":"ntbaker@usgs.gov","middleInitial":"T.","affiliations":[{"id":27231,"text":"Indiana-Kentucky Water Science Center","active":true,"usgs":true},{"id":346,"text":"Indiana Water Science Center","active":true,"usgs":true},{"id":451,"text":"National Water Quality Assessment Program","active":true,"usgs":true},{"id":27111,"text":"National Water Quality Program","active":true,"usgs":true}],"preferred":true,"id":294294,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wilson, John T. 0000-0001-6752-4069 jtwilson@usgs.gov","orcid":"https://orcid.org/0000-0001-6752-4069","contributorId":1954,"corporation":false,"usgs":true,"family":"Wilson","given":"John","email":"jtwilson@usgs.gov","middleInitial":"T.","affiliations":[{"id":35860,"text":"Ohio-Kentucky-Indiana Water Science Center","active":true,"usgs":true},{"id":346,"text":"Indiana Water Science Center","active":true,"usgs":true}],"preferred":false,"id":294293,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Moran, Michael J. mjmoran@usgs.gov","contributorId":1047,"corporation":false,"usgs":true,"family":"Moran","given":"Michael","email":"mjmoran@usgs.gov","middleInitial":"J.","affiliations":[{"id":465,"text":"Nevada Water Science Center","active":true,"usgs":true}],"preferred":true,"id":294292,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":81084,"text":"ofr20071380 - 2008 - Potentiometric Surface of the Upper Floridan Aquifer, West-Central Florida, May 2007","interactions":[],"lastModifiedDate":"2012-02-10T00:11:42","indexId":"ofr20071380","displayToPublicDate":"2008-04-08T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1380","title":"Potentiometric Surface of the Upper Floridan Aquifer, West-Central Florida, May 2007","docAbstract":"The Floridan aquifer system consists of the Upper and Lower Floridan aquifers separated by the middle confining unit. The middle confining unit and the Lower Floridan aquifer in west-central Florida generally contain highly mineralized water. The water-bearing units containing fresh water are herein referred to as the Upper Floridan aquifer. The Upper Floridan aquifer is the principal source of water in the Southwest Florida Water Management District and is used for major public supply, domestic use, irrigation, and brackish water desalination in coastal communities (Southwest Florida Water Management District, 2000).\r\nThis map report shows the potentiometric surface of the Upper Floridan aquifer measured in May 2007. The potentiometric surface is an imaginary surface connecting points of equal altitude to which water will rise in tightly-cased wells that tap a confined aquifer system (Lohman, 1979). This map represents water-level conditions near the end of the dry season, when ground-water levels usually are at an annual low and withdrawals for agricultural use typically are high. The cumulative average rainfall of 41.21 inches for west-central Florida (from June 2006 through May 2007) was 11.63 inches below the historical cumulative average of 52.84 inches (Southwest Florida Water Management District, 2007). Historical cumulative averages are calculated from regional rainfall summary reports (1915 to most recent complete calendar year) and are updated monthly by the Southwest Florida Water Management District. \r\n\r\nThis report, prepared by the U.S. Geological Survey in cooperation with the Southwest Florida Water Management District, is part of a semi-annual series of Upper Floridan aquifer potentiometric-surface map reports for west-central Florida. Potentiometric-surface maps have been prepared for January 1964, May 1969, May 1971, May 1973, May 1974, and for each May and September since 1975. Water-level data are collected in May and September each year to show the approximate annual low and high water-level conditions, respectively. Most of the water-level data for this map were collected by the U.S. Geological Survey during the period May 21-25, 2007. Supplemental water-level data were collected by other agencies and companies. A corresponding potentiometric-surface map was prepared for areas east and north of the Southwest Florida Water Management District boundary by the U.S. Geological Survey office in Orlando, Florida (Kinnaman and Dixon, 2007). Most water-level measurements were made during a 5-day period; therefore, measurements do not represent a 'snapshot' of conditions at a specific time, nor do they necessarily coincide with the seasonal low water-level condition.","language":"ENGLISH","publisher":"Geological Survey (U.S.)","doi":"10.3133/ofr20071380","collaboration":"Prepared in cooperation with Southwest Florida Water Management District","usgsCitation":"Ortiz, A., 2008, Potentiometric Surface of the Upper Floridan Aquifer, West-Central Florida, May 2007: U.S. Geological Survey Open-File Report 2007-1380, 1 Map Sheet: 34 x 34 inches, https://doi.org/10.3133/ofr20071380.","productDescription":"1 Map Sheet: 34 x 34 inches","onlineOnly":"Y","temporalStart":"2007-05-01","temporalEnd":"2007-05-31","costCenters":[{"id":275,"text":"Florida Integrated Science Center","active":false,"usgs":true}],"links":[{"id":190885,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":10952,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2007/1380/","linkFileType":{"id":5,"text":"html"}}],"scale":"500000","projection":"State Plane Florida East","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -84.5,26 ], [ -84.5,30 ], [ -80.75,30 ], [ -80.75,26 ], [ -84.5,26 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b28e4b07f02db6b1722","contributors":{"authors":[{"text":"Ortiz, A.G.","contributorId":53357,"corporation":false,"usgs":true,"family":"Ortiz","given":"A.G.","email":"","affiliations":[],"preferred":false,"id":294284,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":81085,"text":"ofr20081105 - 2008 - Potentiometric Surface of the Upper Floridan Aquifer, West-Central Florida, September 2007","interactions":[],"lastModifiedDate":"2012-02-10T00:11:51","indexId":"ofr20081105","displayToPublicDate":"2008-04-08T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2008-1105","title":"Potentiometric Surface of the Upper Floridan Aquifer, West-Central Florida, September 2007","docAbstract":"The Floridan aquifer system consists of the Upper and Lower Floridan aquifers separated by the middle confining unit. 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The cumulative average rainfall of 39.50 inches for west-central Florida (from October 2006 through September 2007) was 13.42 inches below the historical cumulative average of 52.92 inches (Southwest Florida Water Management District, 2007). Historical cumulative averages are calculated from regional rainfall summary reports (1915 to most recent complete calendar year) and are updated monthly by the Southwest Florida Water Management District. \r\n\r\nThis report, prepared by the U.S. Geological Survey in cooperation with the Southwest Florida Water Management District, is part of a semi-annual series of Upper Floridan aquifer potentiometric-surface map reports for west-central Florida. Potentiometric-surface maps have been prepared for January 1964, May 1969, May 1971, May 1973, May 1974, and for each May and September since 1975. Water-level data are collected in May and September each year to show the approximate annual low and high water-level conditions, respectively. Most of the water-level data for this map were collected by the U.S. Geological Survey during the period September 17-21, 2007. Supplemental water-level data were collected by other agencies and companies. A corresponding potentiometric-surface map was prepared for areas east and north of the Southwest Florida Water Management District boundary by the U.S. Geological Survey office in Orlando, Florida (Kinnaman and Dixon, 2008). 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