Tectonic and magmatic controls on the metallogenesis of porphyry deposits in Alaska
Douglas C. Kreiner, James V. Jones III, Karen D. Kelley, Garth E. Graham
2021, Book chapter, Porphyry deposits of the northwestern Cordillera of North America: A 25-year update
Porphyry Cu and Mo deposits and occurrences are found throughout Alaska; they formed episodically during repeated subduction and arc-continent collisions spanning the Silurian to Quaternary. Porphyry systems occur in continental-margin and island arcs, which are broadly grouped into pre-accretionary or post-accretionary arcs. Pre-Mesozoic occurrences formed in continental or island arcs...
The 2018 update of the US National Seismic Hazard Model: Where, why, and how much probabilistic ground motion maps changed
Mark D. Petersen, Allison M. Shumway, Peter M. Powers, Charles S Mueller, Morgan P. Moschetti, Arthur D. Frankel, Sanaz Rezaeian, Daniel McNamara, Nico Luco, Oliver S. Boyd, Kenneth S. Rukstales, Kishor S. Jaiswal, Eric M. Thompson, Susan M. Hoover, Brandon S. Clayton, Edward H. Field, Yuehua Zeng
2021, Earthquake Spectra (37) 959-987
The 2018 US Geological Survey National Seismic Hazard Model (NSHM) incorporates new data and updated science to improve the underlying earthquake and ground motion forecasts for the conterminous United States. The NSHM considers many new data and component input models: (1) new earthquakes between 2013 and 2017 and updated earthquake...
Why Lyme disease is common in the northern US, but rare in the south: The roles of host choice, host-seeking behavior, and tick density
Howard Ginsberg, Graham J. Hickling, Russell L. Burke, Nicholas H. Ogden, Lorenza Beati, Roger A. LeBrun, Isis M. Arsnoe, Rick Gerhold, Seungeun Han, Kaetlyn Jackson, Lauren Maestas, Teresa Moody, Genevieve Pang, Breann Ross, Eric L. Rulison, Jean I. Tsao
2021, PLoS Biology (19)
Lyme disease is common in the northeastern United States, but rare in the southeast, even though the tick vector is found in both regions. Infection prevalence of Lyme spirochetes in host-seeking ticks, an important component to the risk of Lyme disease, is also high in the northeast and northern...
Groundwater flow conceptualization of the Pahute Mesa–Oasis Valley Groundwater Basin, Nevada—A synthesis of geologic, hydrologic, hydraulic-property, and tritium data
Tracie R. Jackson, Joseph M. Fenelon, Randall L. Paylor
2021, Scientific Investigations Report 2020-5134
This report provides a groundwater-flow conceptualization that integrates geologic, hydrologic, hydraulic-property, and radionuclide data in the Pahute Mesa–Oasis Valley (PMOV) groundwater basin, southern Nevada. Groundwater flow in the PMOV basin is of interest because 82 underground nuclear tests were detonated, most near or below the water table. A potentiometric...
Changing climate drives future streamflow declines and challenges in meeting water demand across the southwestern United States
Olivia L. Miller, Annie L. Putman, Jay R. Alder, Matthew P. Miller, Daniel K. Jones, Daniel R. Wise
2021, Journal of Hydrology X (11)
Society and the environment in the arid southwestern United States depend on reliable water availability, yet current water use outpaces supply. Water demand is projected to grow in the future and climate change is expected to reduce supply. To adapt, water...
Field response and surface rupture characteristics of the 2020 M6.5 Monte Cristo Range earthquake, central Walker Lane, Nevada
Richard D Koehler, Seth Dee, Austin John Elliott, Alexandra Elise Hatem, Alexandra Pickering, Ian Pierce, Gordon G. Seitz
2021, Seismological Research Letters (92) 823-829
The M 6.5 Monte Cristo Range earthquake that occurred in the central Walker Lane on 15 May 2020 was the largest earthquake in Nevada in 66 yr and resulted in a multidisciplinary scientific field response. The earthquake was the...
Paleoseismic trenching reveals late quaternary kinematics of the Leech River Fault: Implications for forearc strain accumulation in Northern Cascadia
Nicolas Harrichhausen, Kristin D. Morell, Christine Regalla, Scott E.K. Bennett, Lucinda J. Leonard, Emerson M. Lynch, Edwin Nissen
2021, Bulletin of the Seismological Society of America (111) 1110-1138
New paleoseismic trenching indicates late Quaternary oblique right‐lateral slip on the Leech River fault, southern Vancouver Island, Canada, and constrains permanent forearc deformation in northern Cascadia. A south‐to‐north reduction in northward Global Navigation Satellite System velocities and seismicity across the Olympic Mountains, Strait of Juan de Fuca (JDF), and the...
Quantifying nuisance ground motion thresholds for induced earthquakes
Ryan Schultz, Vince Quitoriano, David J. Wald, Gregory C. Beroza
2021, Earthquake Spectra (37) 789-802
Hazards from induced earthquakes are a growing concern with a need for effective management. One aspect of that concern is the “nuisance” from unexpected ground motions, which have the potential to cause public alarm and discontent. In this article, we borrow earthquake engineering concepts to quantify the...
Have sustained acidic deposition decreases led to increased calcium availability in recovering watersheds of the Adirondack region of New York, USA?
Gregory B. Lawrence, Jason Siemion, Michael R. Antidormi, Donald B. Bonville, Michael McHale
2021, Soil Systems (5)
Soil calcium depletion has been strongly linked to acidic deposition in eastern North America and recent studies have begun to document the recovery of soils in response to large decreases in acidic deposition. However, increased calcium availability has not yet been seen in the B horizon, where calcium depletion has...
Water-quality trends of urban streams in Independence, Missouri, 2005–18
Miya N. Barr, Stephen J. Kalkhoff
2021, Scientific Investigations Report 2020-5130
The U.S. Geological Survey and the city of Independence, Missouri, Water Pollution Control Department has studied the water quality and ecological condition of urban streams within Independence since 2005. Selected physical properties, nutrients, chloride, fecal indicator bacteria (Escherichia coli and total coliform), total dissolved solids, and suspended-sediment concentration data for...
Migration of injected wastewater with high levels of ammonia in a saline aquifer in south Florida
Nicasio Sepulveda, Melinda A. Lohmann
2021, Groundwater (59) 597-613
Treated wastewater with high levels of ammonia has been injected, since March 1983 into the deep saline units of the Lower Floridan aquifer (LFA) from a treatment plant near the east coast of Miami-Dade County in southeastern Florida. Monitoring wells in the plant recorded ammonia concentrations above ambient levels at...
Development and application of surrogate models, calculated loads, and aquatic export of carbon based on specific conductance, Big Cypress National Preserve, south Florida, 2015–17
Amanda Booth
2021, Open-File Report 2020-1136
Understanding the carbon transport within aquatic environments is crucial to quantifying global and local carbon budgets, yet limited empirical data currently (2021) exist. This report documents methodology and provides data for quantifying the aquatic export of carbon from a cypress swamp within Big Cypress National Preserve and is part of...
Re-examination of population structure in Arctic ringed seals using DArTseq genotyping
Aimee R. Lang, Peter L. Boveng, L. Quakenbush, K. Robertson, M. Lauf, Karyn D. Rode, H. Ziel, B .L. Taylor
2021, Endangered Species Research (44) 11-31
Although Arctic ringed seals Phoca hispida hispida are currently abundant and broadly distributed, their numbers are projected to decline substantially by the year 2100 due to climate warming. While understanding population structure could provide insight into the impact of environmental changes on this subspecies, detecting demographically important levels of exchange can be...
An assessment of the economic potential of lignite and leonardite resources in the Williston Basin, North Dakota
Brian N. Shaffer
2021, Open-File Report 2020-1135
The Bureau of Land Management (BLM) requested assistance from the U.S. Geological Survey (USGS) to conduct an assessment study to identify areas that may have economic potential for the future extraction of lignite and leonardite resources in the Williston Basin in North Dakota. The study will be used by the...
Coseismic fault slip and afterslip associated with the M5.7 March 18, 2020 Magna, Utah, earthquake
Frederick Pollitz, Charles Wicks, Jerry L. Svarc
2021, Seismological Research Letters (92) 741-754
The 2020 Magna, Utah, earthquake produced observable crustal deformation over a ∼ 100 km2 area around the southeast margin of Great Salt Lake, but it did not produce any surface rupture. To obtain a detailed picture of the fault slip, we combine strong motion seismic waveforms with GPS static offsets...
Geochemistry of coastal permafrost and erosion-driven organic matter fluxes to the Beaufort Sea near Drew Point, Alaska
Emily M. Bristol, Craig T. Connolly, Thomas Lorenson, Bruce M. Richmond, Anastasia G. Ilgen, Charles R. Choens, Diana L. Bull, Mikhail Z. Kanevskiy, Go Iwahana, Benjamin M. Jones, James W. McClelland
2021, Frontiers in Earth Science (8)
Accelerating erosion of the Alaska Beaufort Sea coast is increasing inputs of organic matter from land to the Arctic Ocean, and improved estimates of organic matter stocks in eroding coastal permafrost are needed to assess their mobilization rates under contemporary conditions. We collected three permafrost cores (4.5–7.5 m long)...
Trends in groundwater levels in and near the Rosebud Indian Reservation, South Dakota, water years 1956–2017
Kristen J. Valseth, Daniel G. Driscoll
2021, Scientific Investigations Report 2020-5119
The U.S. Geological Survey (USGS), in cooperation with the Rosebud Sioux Tribe, completed a study to characterize water-level fluctuations in observation wells to examine driving factors that affect water levels in and near the Rosebud Indian Reservation, which comprises all of Todd County. The study investigates concerns regarding potential effects...
Kīlauea’s 2008–2018 summit lava lake—Chronology and eruption insights
Matthew R. Patrick, Tim R. Orr, Don Swanson, Bruce F. Houghton, Kelly M. Wooten, Liliana G. Desmither, Carolyn Parcheta, David Fee
Matthew R. Patrick, Tim R. Orr, Don Swanson, Bruce F. Houghton, editor(s)
2021, Professional Paper 1867-A
The first eruption at Kīlauea’s summit in 25 years began on March 19, 2008, and persisted for 10 years. The onset of the eruption marked the first explosive activity at the summit since 1924, forming the new “Overlook crater” (as the 2008 summit eruption crater has been informally named) within...
Spatial behavior of northern flying squirrels in the same social network
Corinne A. Diggins, W. Mark Ford
2021, Ethology (127) 424-432
North American flying squirrels (Glaucomys spp.) are social species that communally den and exhibit home range overlap. However, observations on home range overlap tend to come from live-trapped individuals and it is unknown whether overlap occurs among individuals belonging...
Regional crop water use assessment using Landsat-derived evapotranspiration
Arun Bawa, Gabriel B. Senay, Sandeep Kumar
2021, Hydrologic Processes (35)
Reliable information on water use and availability at basin and field scales are important to ensure the optimized constructive uses of available water resources. This study was conducted with the specific objective to estimate Landsat-based actual evapotranspiration (ETa) using the Operational Simplified Surface Energy Balance (SSEBop) model across the state...
River terrace evidence of tectonic processes in the eastern North American plate interior, South Anna River, Virginia
Frank J. Pazzaglia, Helen F. Malenda, Matthew L. McGavick, Cody Raup, Mark W. Carter, Claudio Berti, Shannon A. Mahan, Michelle S. Nelson, Tammy M. Rittenour, Ron Counts, Jane K Willenbring, Dru Germanoski, Stephen C. Peters, William D. Holt
2021, Journal of Geology (129) 595-624
We show that long-recognized seismicity in the central Virginia seismic zone of the eastern North American intraplate setting arises primarily from tectonic processes predicted by new, fully coupled plate tectonic geodynamic models. The study leverages much new geophysical and geologic data following the 2011 Mineral, Virginia, earthquake that ruptured a...
Correcting the historical record for Kīlauea Volcano's 1832, 1868, and 1877 summit eruptions
Tim R. Orr, Richard W. Hazlett, Liliana G. DeSmither, James P. Kauahikaua, Ben Gaddis
2021, Journal of Volcanology and Geothermal Research (410)
Three fissure eruptions are known to have occurred along the northeastern edge of Kīlauea's summit caldera in the 19th century—in the years 1832, 1868, and 1877. Modern portrayal of these eruptions on maps and in written sources indicates that the 1832...
Shared functional traits explain synchronous changes in long‐term count trends of migratory raptors
Patricia Kaye T. Dumandan, Keith L. Bildstein, Laurie J. Goodrich, Andrii Zaiats, Trevor Caughlin, Todd E. Katzner
2021, Global Ecology and Biogeography (30) 640-650
AimAssessing long‐term shifts in faunal assemblages is important to understand the consequences of ongoing global environmental change. One approach to assess drivers of assemblage changes is to identify the traits associated with synchronous shifts in count trends among species. Our research identified traits influencing trends in 73 years...
Rupture process of the M6.5 Stanley, Idaho, earthquake inferred from seismic waveform and geodetic data
Frederick Pollitz, William C. Hammond, Charles Wicks
2021, Seismological Research Letters (92) 699-709
The 2020 M 6.5 Stanley, Idaho, earthquake produced rupture in the north of the active Sawtooth fault in the northern basin and range at depth, without any observable surface rupture. Global Positioning System (GPS) and Interferometric Synthetic Aperture Radar (InSAR) data yield several millimeters of static offsets out to ∼100 km from the...
Variation in black bass angler characteristics by stream size and accessibility in Oklahoma’s Ozark Highland streams
B. Chapagain, James M. Long, Andrew T. Taylor, O. Joshi
2021, North American Journal of Fisheries Management (41) 585-599
Fishing in streams and rivers is a popular outdoor recreation activity in eastern Oklahoma, where most anglers target black bass (Micropterus) species. Since the early 1990s, when the last assessment of black bass fishing in the region was conducted, broadscale factors such as harvesting behavior, state fishery regulations, and bass...
