Deformation by pressure solution and grain boundary sliding in a retrograde shear zone in southern New England, USA
Robert P. Wintsch, Bryan A. Wathen, Ryan J. McAleer, Jesse Walters, Jessica A. Matthews
2024, American Journal of Science (324)
Alleghanian phyllonites in a shear zone in southern New England were formed by the retrogression and hydration of a high-grade Acadian pelitic schist. The retrogression was locally incomplete, resulting in both heterogeneous mineralogy and mineral compositions, and in many arrested reaction textures. These features, documented by backscattered electron and element...
Monitoring animal populations with cameras using open, multistate, N-mixture models
Alexej P.K. Siren, Michael T. Hallworth, Jillian R. Kilborn, Chris A. Bernier, Nicholas L. Fortin, Katherina D. Geider, Riley K. Patry, Rachel M. Cliche, Leighlan S. Prout, Suzanne J. Gifford, Scott Wixsom, Toni Lyn Morelli, Tammy L. Wilson
2024, Ecology and Evolution (14)
Remote cameras have become a mainstream tool for studying wildlife populations. For species whose developmental stages or states are identifiable in photographs, there are opportunities for tracking population changes and estimating demographic rates. Recent developments in hierarchical models allow for the estimation of ecological states and rates over time for...
Assessment of the interconnection between Tampa Bay and the Floridan aquifer system: Historical groundwater data compilation and analysis, 1976–2022
Jeremy D. Decker
2024, Scientific Investigations Report 2024-5073
The U.S. Geological Survey used existing data collected after the last major navigational channel modification in the mid-1980s to investigate groundwater levels and chloride concentrations in wells in the Floridan aquifer system and other aquifers beneath and near Tampa Bay. Tampa Bay is located on the west-central coast of Florida...
Facilitating psychological safety in science and research teams
Megan Siobhan Jones, Amanda E. Cravens, Jill Zarestky, Courtney Ngai, Hannah B. Love
2024, Humanities and Social Sciences Communications (11)
Science is increasingly dependent on large teams working well together. Co-creating knowledge in this way, usually across disciplines and institutions, requires team members to feel comfortable taking interpersonal risks with each other; in other words, to have what is known as “psychological safety”. Although the importance of psychological safety for...
The U.S. Geological Survey National Water Quality Network—Groundwater—2023
Bruce D. Lindsey, James A. Kingsbury
2024, General Information Product 247
The U.S. Geological Survey (USGS) operates a National Water Quality Network (NWQN) to monitor trends in groundwater quality and assess emerging contaminants of concern. It is a “network of networks” with 81 subnetworks being sampled on a decadal time scale. Each year, eight of the subnetworks are sampled. Subnetworks have...
New methodology for assessing underground natural gas storage resources – Example from Michigan Basin, United States
Marc L. Buursink, Ashton M. Wiens, Brian A. Varela, Matthew M. Jones, Philip A. Freeman
2024, Conference Paper
Energy consumption in the United States (U.S.) and across the world is shifting away from traditional fossil fuels like coal and oil, and towards natural gas and renewable sources, including hydrogen. Because gas demand is typically greatest during cold seasons and renewable sources sometimes produce variable supplies, it is important...
A partially nonergodic ground-motion model for Fourier amplitude spectra for the San Francisco Bay area, California, USA
Morgan P. Moschetti, Eric M. Thompson, Ryan Peterson, James Andrew Smith, Brad T. Aagaard
2024, Conference Paper
We develop a partially nonergodic ground-motion model (GMM) for Fourier amplitude spectra for the San Francisco Bay Area, California, USA, using the Bayless and Abrahamson (2019) GMM as a reference ergodic GMM and developing location-dependent adjustments to the predicted median and variance. We compile regional ground-motion data from moment magnitude (𝑀w)...
New developments at the Center for Engineering Strong-Motion Data (CESMD)
Lijam Hagos, Hamid Haddadi, Lisa Sue Schleicher, Jamison Haase Steidl, Eric M. Thompson, Heather Crume, M. Dhar, N. Leue
2024, Conference Paper
The Center for Engineering Strong-Motion Data (CESMD), an internationally utilized joint center of the U.S. Geological Survey (USGS) and the California Geological Survey (CGS), provides a single access point for earthquake strong-motion records and station metadata from the CGS California Strong-Motion Instrumentation Program (CSMIP), the USGS National Strong-Motion Project (NSMP),...
Natural resource management confronts the growing scale and severity of ecosystem responses to drought and wildfire
Seth M. Munson, Anna L. Vaughn, Brian Petersen, John B. Bradford, Michael C. Duniway
2024, Ecology and Society (29)
Intensification of drought and wildfire associated with climate change has triggered widespread ecosystem stress and transformation. Natural resource managers are on the frontline of these changes, yet their perspectives on whether management actions match the scale and align with the severity of ecosystem responses to improve outcomes are not well...
Challenges in developing vertical hazard for seismic analysis of concrete dams
N. Simon Kwong, Sanaz Rezaeian, Andrew James Makdisi, Nico Luco
2024, Conference Paper
The seismic response of concrete dams depends on both the horizontal (H) and vertical (V) components of ground motion (GM), and excluding the V components when conducting response history analyses (RHAs) may underestimate the seismic fragility. Although V components of GM time series could be selected to be consistent with...
Perspectives on equitable co-production workshop report
Kristin Timm, K. Akerlof, Aparna Bamzai-Dodson, G. Bogard, A. Chase, R. Cloyd, J. Garron, M. Gavazzi, E. Heath, M. Labriole, M. Madajewicz, J. L. Sheats, Carol Simpson, Ryan C. Toohey, N. Udu-gama
2024, Report
The co-production of knowledge is increasingly recognized as an approach to conducting research intended to achieve a societal impact. In this study, we used a broad definition of co-production, defining it as “a process that brings together diverse groups to iteratively create new knowledge and practices (1).” However, co-production has...
Development of USGS NSHMs: Do small changes in hazard imply small changes in risk?
N. Simon Kwong, Kishor S. Jaiswal
2024, Conference Paper
One of the flagship products from the U.S. Geological Survey (USGS) is the National Seismic Hazard Model (NSHM). Since 1976, the NSHM has been periodically updated to reflect newly published earthquake science and provide probabilistic estimates of seismic hazard for the United States. During each update cycle, alternative models are...
Geophysical modeling of a possible blind geothermal system near Battle Mountain, NV
Tait E. Earney, Jonathan M.G. Glen, Jared R. Peacock, James Faulds, William D. Schermerhorn, Grant Harold Rea-Downing, Jacob Elliott Anderson, Cary R. Lindsey, Maria Richards
2024, Conference Paper, Using the Earth to save the Earth
The northeastern portion of the Reese River basin in north-central Nevada is the focus of detailed geophysical and geological studies as part of the INGENIOUS project, which aims to identify new, commercially viable hidden geothermal systems in the Great Basin region of the western U.S. This location, herein referred to...
Reconciling bias in moderate magnitude earthquake ground motions predicted by numerical simulations
K. C. Sajan, Chukwuebuka C. Nweke, Jonathon P. Stewart, Robert Graves
2024, Conference Paper
Recent studies found a significant underprediction in ground motion intensity measures for finite-fault simulations of moderate magnitude events in southern California relative to established ground motion models. This study aims to understand the source(s) of this bias by evaluating ground motion residuals. For this, simulations have been performed for a...
The advantages of electric-grade heat storage in long closed-loop wells
Junyuan Zhang, Erick R. Burns, Hongbin Zhan
2024, Conference Paper, Geothermal Rising Conference Transactions
Though long (e.g., tens of kilometers) closed-loop geothermal wells are under consideration for the extraction of subsurface heat, these wells might also serve as an efficient energy storage mechanism for electricity generation. Using a semi-analytic model solution, the potential for electric-grade heat storage as a function of ambient temperature (e.g.,...
Seabird diets in the Gulf of Alaska 1978–2024
Mayumi L. Arimitsu, Brie Drummond, Scott A. Hatch, Heather M. Renner, Nora A. Rojek, Shannon Wheland
2024, Report, Ecosystem status report 2024: Gulf of Alaska, stock assessment and fishery evaluation report
No abstract available....
Predicting hydrothermal reservoir depth from chemical geothermometers using a three-dimensional temperature model in the Great Basin, USA
Jacob DeAngelo, Erick R. Burns, Stanley Paul Mordensky
2024, Conference Paper, Geothermal Rising Conference transactions
Recent work in the Great Basin region of the western United States has made it possible to predict the depth of hydrothermal reservoirs (i.e., the depth at which heat is accumulated prior to ascent via hydrothermal upflow) identified through geochemistry and to contextualize the spatial patterns of these reservoir depths....
Investigating the influence of forest disturbance on grizzly bear habitat ecology and fitness in the Northern Continental Divide Ecosystem
Milan V. Vinks, Sarah Nelson Sells, Cecily M. Costello
2024, Report
No abstract available....
Intertidal ecosystem indicators in the northern Gulf of Alaska
Heather A. Coletti, Sarah Beth Traiger, Daniel Esler, Katrin Iken, Jim Bodkin, Brenda E. Ballachey, Kimberly A. Kloecker, Brenda H. Konar, Mandy Lindeberg, Daniel Monson, Brian H. Robinson, Robert M. Suryan, Ben P. Weitzman
2024, Report, Ecosystem status report 2024: Gulf of Alaska, stock assessment and fishery evaluation report
No abstract available....
A regional synthesis of climate data to inform the 2025 State Wildlife Action Plans in the Northeast U.S.
Michelle Staudinger, Ambarish Karmalkar, Karen Terwilliger, Kevin Burgio, Alice Lubeck, Hanusia Higgins, Tracy Rice, Toni Lyn Morelli, Anthony D’Amato
2024, Report
The State Wildlife Action Plans (SWAPs) are proactive planning documents, known as “comprehensive wildlife conservation strategies,” that assess the health of each state’s wildlife and habitats, identify current management and conservation challenges, and outline needed actions to conserve natural resources over the long term. SWAPs are revised every 10 years,...
Management of tidal wetland restoration and fish in the upper San Francisco Estuary: Where are we now and how do we move forward? A summary of the 2023 Wetland Science Symposium
Rosemary Hartman, Matthew J. Young, Stacy Sherman, David E. Ayers, Elizabeth Brusati, Dylan Chapple, Emma Mendonsa, Edward Hard, Louise Conrad
2024, San Francisco Estuary and Watershed Science (22)
Tidal wetland restoration to benefit at-risk fish species in the Sacramento-San Joaquin Delta and Suisun marsh has gained momentum over the past decade, much of it in response to mitigation requirements for the State Water Project and Central Valley Project. In fall 2023, the Department of Water Resources and the...
Amphibian and reptile conservation in the United States of America
Deanna H. Olson, David S. Pilliod
Susan C. Walls, Katherine O'Donnell, editor(s)
2024, Book chapter
Wildlife stewardship is of utmost importance in the United States, where management for sustainable natural resources is extended to native species including amphibians and reptiles. The U.S. wildlife conservation framework is a nested system of authorities regulating species and habitats, science-based management and policy decisions, and adaptive management as new...
Colorado Delta riparian plant health improvement
Pamela L. Nagler
2024, Conference Paper
The riparian corridor along Mexico’s arid Colorado River Delta is being affected by reduction in river flow and increases in heat, drought, human infrastructure, and disturbances. These disturbances can change riparian land cover by limiting water availability for riparian plant species, increasing fire intensity and frequency, and increasing soil and...
A journey to the center of the USGS National Strong-motion Project processing and beyond
Lisa Sue Schleicher, Jamison Haase Steidl, Eric M. Thompson, Alan K. Yong, Jeff Brody, James Luke Blair, Mike Hearne, Brad T. Aagaard, Susan E. Hough, Han Shao, Garet Huddleston, Keira Heilpern, Kristin Marano, Gabe Ferragut, B. Worden, David J. Wald, Jason De Cristofaro, Adria Ruth McClain, B. Dunham, D. Nget, J. Aragon, J. Gomez, V. Amador, V. Carrasco Rodriquez, E. E. Luna, D. Cembalski, D. Childs, J. Smith, D. Croker, L. Gee
2024, Conference Paper
The United States Geological Survey (USGS) National Strong Motion Project (NSMP) has the primary U.S. government responsibility to acquire, process, and disseminate significant strong-motion earthquake ground motion records measured at surficial free-field stations, structures (buildings, dams, and bridges, and geotechnical arrays to the earthquake engineering community. As a result of...
Salmon data mobilization
Graeme Diack, Tom Bird, Scott A. Akenhead, Jennifer M. Bayer, Deirdre Brophy, Colin Bull, Elvira de Eyto, Nora Hanson, Brett T. Johnson, Matt Jones, Alexis Knight, Marie Nevoux, Tim van der Strap, Alan Walker
2024, North Pacific Anadromous Fish Commission Bulletin 61-76
Despite substantial research and conservation efforts, many salmon populations are in decline. Globally, salmon research is not delivering effective decision support products to help managers apply research insights as informed management actions. Data Mobilization (DM) is a key step towards building the wider evidence base required to deliver accountable, reliable,...
