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Filter Total Items: 171137

Outgassing through magmatic fractures enables effusive eruption of silicic magma

Several mechanisms have been proposed to allow highly viscous silicic magma to outgas efficiently enough to erupt effusively. There is increasing evidence that challenges the classic foam-collapse model in which gas escapes through permeable bubble networks, and instead suggests that magmatic fracturing and/or accompanying localized fragmentation and welding within the conduit play an important ro
Authors
Joshua Allen Crozier, Samantha Tramontano, Pablo Forte, Sarah Oliva, Helge M. Gonnermann, Einat Lev, Michael Manga, Madison Myers, Erika Rader, Philipp Ruprecht, Hugh Tuffen, Rebecca Paisley, Bruce F. Houghton, Tom Shea, Ian Schipper, Jonathan Castro

Beyond the teleseism: Introducing regional seismic and geodetic data into routine USGS finite‐fault modeling

The U.S. Geological Survey (USGS) National Earthquake Information Center (NEIC) routinely produces finite‐fault models following significant earthquakes. These models are spatiotemporal estimates of coseismic slip critical to constraining downstream response products such as ShakeMap ground motion estimates, Prompt Assessment of Global Earthquake for Response loss estimates, and ground failure ass
Authors
Dara Elyse Goldberg, Pablo Koch, Diego Melgar, Sebastian Riquelme, William L. Yeck

Reimagine fire science for the anthropocene

Fire is an integral component of ecosystems globally and a tool that humans have harnessed for millennia. Altered fire regimes are a fundamental cause and consequence of global change, impacting people and the biophysical systems on which they depend. As part of the newly emerging Anthropocene, marked by human-caused climate change and radical changes to ecosystems, fire danger is increasing, and
Authors
Jacquelyn K. Shuman, Jennifer K. Balch, Rebecca T. Barnes, Philip E. Higuera, Christopher I. Roos, Dylan W. Schwilk, E. Natasha Stavros, Tirtha Banerjee, Megan Bela, Jacob Bendix, Sandro Bertolino, Solomon Bililign, Kevin D. Bladon, Paulo Brando, Robert E. Breidenthal, Brian Buma, Donna Calhoun, Leila M. V. Carvalho, Megan Cattau, Kaelin M Cawley, Sudeep Chandra, Melissa L. Chipman, Jeanette Cobian, Erin Conlisk, Jonathan Coop, Alison Cullen, Kimberley T Davis, Archana Dayalu, Megan Dolman, Lisa M. Ellsworth, Scott Franklin, Chris Guiterman, Matthew Hamilton, Erin J. Hanan, Winslow D. Hansen, Stijn Hantson, Brian J Harvey, Andrés Holz, Matt Hurteau, Nayani T Ilangakoon, Megan Jennings, Charles Jones, Anna Klimaszewski-Patterson, Leda N. Kobziar, John Kominoski, Branko Kosovic, Meg A. Krawchuk, Paul Laris, Jackson Leonard, S. Marcela Loria- Salazar, Melissa Lucash, Hussam Mahmoud, Ellis Margolis, Toby Maxwell, Jessica McCarty, David B McWethy, Rachel Meyer, Jessica R. Miesel, W. Keith Moser, R. Chelsea Nagy, Dev Niyogi, Hannah M. Palmer, Adam Pellegrini, Benjamin Poulter, Kevin Robertson, Adrian Rocha, Mojtaba Sadegh, Fernando De Sales, Fernanda Santos, Facundo Scordo, Joseph O. Sexton, A Surjalal Sharma, Alistair M. S. Smith, Amber Soja, Christopher Still, Tyson Swetnam, Alexandra D. Syphard, Morgan W. Tingey, Ali Tohidi, Anna Trugman, Merritt Turetsky, J. Morgan Varner, Yuhang Wang, Thea Whitman, Stephanie Yelenik, Xu Zhang

Groundwater resources of the Harney Basin, southeastern Oregon

In response to increasing groundwater demand and declining groundwater levels in the Harney Basin of southeastern Oregon, the U.S. Geological Survey and the Oregon Water Resources Department conducted a cooperative groundwater-availability study during 2016–22. This Fact Sheet summarizes the results of this study. Full details of the study are provided in Gingerich and others (2022a, 2022b), Garci
Authors
Stephen B. Gingerich, C. Amanda Garcia, Henry M. Johnson

Morbidity and mortality of Hawaiin geese (Branta sandvicensis) and Laysan albatross (Phoebastria immutabilis) associated with reticuloendotheliosis virus

Only one virus, Avipox, has been documented previously in wild birds in Hawaii. Using immunohistochemistry and PCR, we found that two native threatened Hawaiian Geese (Branta sandvicensis), one with multicentric histiocytoma and the other with toxoplasmosis, and one Laysan Albatross (Phoebastria immutabilis) with avian pox were infected with reticuloendotheliosis virus (REV). The virus was isolate
Authors
Thierry M. Work, Renee Breeden, Julie Dagenais, Robert Rameyer, Holly Sellers, Hon S. Ip, James W. Casey

Evaluating hydrologic region assignment techniques for ungaged basins in Alaska, USA

Building continental-scale hydrologic models in data-sparse regions requires an understanding of spatial variation in hydrologic processes. Extending these models to ungaged locations requires techniques to group ungaged locations with gaged ones to make process importance and model parameter transfer decisions to ungaged locations. This analysis (1) tested the utility of fundamental streamflow st
Authors
Theodore B. Barnhart, William H. Farmer, John C. Hammond, Graham A. Sexstone, Janet H. Curran, Joshua C. Koch, Jessica M. Driscoll

Evidence gaps and diversity among potential win–win solutions for conservation and human infectious disease control

As sustainable development practitioners have worked to “ensure healthy lives and promote well-being for all” and “conserve life on land and below water”, what progress has been made with win–win interventions that reduce human infectious disease burdens while advancing conservation goals? Using a systematic literature review, we identified 46 proposed solutions, which we then investigated individ
Authors
Skylar R. Hopkins, Kevin D. Lafferty, Chelsea L. Wood, Sarah H Olson, Julia C Buck, Giulio A. De Leo, Kathryn Fiorella, Johanna Fornberg, Andres Garchitorena, Isabel J. Jones, Armand Kuris, Laura H Kwong, Christopher LeBoa, Ariel Elizabeth Leon, Andrea Lund, Andrew J MacDonald, Daniel Metz, Nicole Nova, Alison J. Peel, Justin V. Remais, Tara E. Stewart Merrill, Maya Wilson, Matthew Bonds, Andrew Dobson, David Lopez-Carr, Meghan Howard, Lisa Mandle, Susanne H. Sokolow

Longitudinal water-temperature profiles in Mill Creek, Mason County, Washington

In streams supporting Pacific salmon (Oncorhynchus spp.) within the southern Puget Lowland, high water temperatures during late summer are a primary water-quality concern. The metabolic rates of fish and other ectothermic (in other words, cold-blooded) species are regulated by water temperature; salmon and other cold-water fish have specific thermal tolerances outside of which they are susceptible
Authors
Andrew S. Gendaszek, Richard W. Sheibley, Erica Marbet, Joe Puhn, Catherine Seguin

Element concentrations and grain size of sediment from the Similkameen River above Enloe Dam (Enloe Reservoir) near Oroville, Washington, 2019

In 2019, the U.S. Geological Survey conducted a reconnaissance survey of concentrations of 41 trace elements present in bed sediment in the reservoir on the Similkameen River upstream from Enloe Dam, near Oroville, Washington. The Similkameen River drains a watershed containing highly mineralized geologic deposits with current (2019) and historical mining activity. Results of this survey indicated

Authors
Stephen E. Cox, Christopher A. Curran, Andrew R. Spanjer, Chad C. Opatz, Renee K. Takesue, J. Lynn Bell

Documenting the multiple facets of a subsiding landscape from coastal cities and wetlands to the continental shelf

Land subsidence is a settling, sinking, or collapse of the land surface. In the southeastern United States, subsidence is frequently observed as sinkhole collapse in karst environments, wetland degradation and loss in coastal and other low-lying areas, and inundation of coastal urban communities. Human activities such as fluid extraction, mining, and overburden alteration can cause or exacerbate s
Authors
James G. Flocks, Eileen McGraw, John Barras, Julie Bernier, Mike Bradley, Devin L. Galloway, James Landmeyer, W. Scott McBride, Christopher Smith, Kathryn Smith, Christopher Swarzenski, Lauren Toth

Management of diseases in free-ranging wildlife populations

Diseases are increasingly threatening the conservation of wildlife species. Spillover of pathogens into humans and domestic animals may negatively impact public health and the economy, requiring increased proactive management actions. The North American Wildlife Management Model provides the philosophical basis for managing wildlife and underpins all management options. Diseases in wildlife pop
Authors
Mark L. Drew, Jonathan M. Sleeman

Future directions to manage wildlife health in a changing climate

In September 2019 The Economist wrote an obituary to Okjökull, a glacier in western Iceland that was declared “dead” in 2014, a victim of climate change. Although a few wildlife species have already incurred such a fate (e.g., the Bramble Cay melomys [Melomys rubicola]) (Fulton 2017), many more are on the path to climate-driven extinction (Andermann et al. 2020; Ceballos et al. 2015; He et al. 201
Authors
Erik K. Hofmeister, Emily Cornelius Ruhs, Lucas Fortini, M. Camille Hopkins, Lee C. Jones, Kevin D. Lafferty, Jonathan M. Sleeman, Olivia E. LeDee