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Browse more than 160,000 publications authored by our scientists over the past 100+ year history of the USGS. Publications available are: USGS-authored journal articles, series reports, book chapters, other government publications, and more.
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Deformed submarine terraces in Puget Sound, Pacific Northwest, indicate only one M >~7.5 earthquake on the Seattle fault zone in the past 11,000 yr Deformed submarine terraces in Puget Sound, Pacific Northwest, indicate only one M >~7.5 earthquake on the Seattle fault zone in the past 11,000 yr
Submerged marine terraces in Puget Sound, deformed across the Seattle fault zone (SFZ), indicate that only one earthquake as large as M~7.5 has occurred in at least the past 11 kyr. Previous paleoseismic studies document a M~7.5 earthquake between 923–4 CE, which uplifted coastal marine terraces by as much as 8 m. We demonstrate that this earthquake was the only such event since ~11 ka...
Authors
Elizabeth J. Davis, Juliet G. Crider, Ralph A. Haugerud, Emily Roland, Ginevra Moore
Demographic responses to experimental manipulation of an enclosed population of invasive brown treesnakes (Boiga irregularis) Demographic responses to experimental manipulation of an enclosed population of invasive brown treesnakes (Boiga irregularis)
Understanding how invasive species populations respond to perturbations can give insight into effective management. However, opportunities to test theoretical population responses are rare, as experimental perturbations often run counter to management goals (e.g., suppression). On the island of Guam, a 5-ha outdoor enclosure (with no immigration or emigration) constructed in 2003 serves...
Authors
Amanda Marie Kissel, Robert Reed, Björn Lardner, Gordon H. Rodda, Julie A. Savidge, Amy A. Yackel Adams
Demonstration, validation, and application of hyperspectral microscopy for the collection of cyanobacterial spectral signatures Demonstration, validation, and application of hyperspectral microscopy for the collection of cyanobacterial spectral signatures
Cyanobacterial and other algal blooms are an environmental concern in waterbodies worldwide. While these blooms are a nuisance for recreational activities, they can also be harmful to human and wildlife health when the algae produce and release toxins. Algal community composition can be monitored and analyzed by acquiring hyperspectral images that provide information on various...
Authors
Natalie C. Hall, Adam C. Mumford, Aaron M. Goldfain, David W. Allen, E. Terrence Slonecker, Alisa Shtabnoy, Carl J. Legleiter, Sarah A. Spaulding
Density dependence and habitat selection affect overwintering abundance of monarch butterflies at regional and site scales in California Density dependence and habitat selection affect overwintering abundance of monarch butterflies at regional and site scales in California
The monarch butterfly (Danaus plexippus) is a species of iconic cultural interest. Thanks to annual overwintering monarch counts at hundreds of locations in coastal California, we are able to track fluctuations with high temporal and spatial resolution. Between 1997 and 2024, monarch populations at overwintering sites in the western United States experienced severe dips, at times (2018...
Authors
Peter Christian Ibsen, Zachary H. Ancona, Emma Pelton, Stephanie Little, James E. Diffendorfer
Depositional interplay between the Ancestral Rocky Mountains and Ouachita–Marathon–Sonora orogenies: Insights from provenance records in the late Paleozoic Marfa Basin, West Texas, U.S.A. Depositional interplay between the Ancestral Rocky Mountains and Ouachita–Marathon–Sonora orogenies: Insights from provenance records in the late Paleozoic Marfa Basin, West Texas, U.S.A.
The Marfa Basin in West Texas is a late Palaeozoic synorogenic depocenter associated with regional deformation linked to the Ancestral Rocky Mountains (ARM) and Ouachita–Marathon–Sonora (OMS) orogenies in southwestern Laurentia. Basin strata range in age from Middle Pennsylvanian to the middle Permian and include the Cieneguita, Alta, Pinto Canyon, Rose Mine and Mina Grande Formations...
Authors
Sandra Juárez-Zúñiga, Daniel F. Stockli, Benjamin G. Johnson, Timothy F. Lawton
Depth-resolved carbon dioxide and methane concentrations in 522 lakes, ponds, and reservoirs worldwide Depth-resolved carbon dioxide and methane concentrations in 522 lakes, ponds, and reservoirs worldwide
Lakes, ponds, and reservoirs (hereafter: “lakes”) are important sources of the greenhouse gases carbon dioxide (CO2) and methane (CH4). Emissions of CO2 and CH4 from lakes are regulated in part by in-lake processes, including the production and storage of gases in the lower parts of the water column (bottom waters). However, while substantial efforts have been made to improve estimates...
Authors
Joseph S. Rabaey, Abigail S. Lewis, Katrin Attermeyer, Patrick Aurich, Sheel Bansal, Maciej Bartosiewicz, Brittni L. Bertolet, Ingeborg Bussmann, Sarah B. Cadieux, Elisa Calamita, Camilla Capelli, Cayelan C. Carey, Carmen Cillero, Francois Clayer, Sofia L. D'Ambrosio, Thomas A. Davidson, Bridget R. Deemer, Blaize A. Denfeld, Werner Eckert, Chiara Esposito, Phillip Ford, Adrianna Gorsky, Natalie A. Griffiths, Hans-Peter F. Grossart, David P. Hamilton, Meredith A. Holgerson, Brian J. Huser, Tomoya Iwata, Joachim Jansen, Stuart E. Jones, Sari Juutinen, Pirkko Kortelainen, Matthias Koschorreck, Theis Kragh, Alo Laas, Tuula Larmola, Saskia Läubli, Isabelle Laurion, Moritz F. Lehmann, Liu Liu, Pertti J. Martikainen, Anna Matoušů, Stephen A. McCord, Jorge J. Montes-Pérez, Daniele Nizzoli, César Ordóñez, Mike Peacock, Rachel M. Pilla, Vilmantas Prėskienis, Junbing Pu, Tenna Riis, Taija Saarela, Arianto B. Santoso, Carsten Schubert, Armando Sepulveda-Jauregui, Bradford S. Sherman, Jonas S. Sø, Katherine J. Stenehjem, Kristin E.D. Strock, Kenji Tsuchiya, Katrin Wendt-Potthoff, Gesa A. Weyhenmeyer, Petr Znachor, Jakob Zopfi
Describing the seasonal abundance and growth rates of larval fishes across productivity gradients in Lake Huron in 2017 Describing the seasonal abundance and growth rates of larval fishes across productivity gradients in Lake Huron in 2017
Several of the Laurentian Great Lakes, including Lake Huron, have undergone oligotrophication in the past decades and prey fish biomass has concomitantly declined. One potential mechanism to explain declines in prey fish is slower growth and lower survival at the larval stage. To determine whether reduced productivity affects the growth of larval fish, we sampled larval fishes and their
Authors
David B. Bunnell, Lauren A. Eaton, Patricia M. Dieter, Paris D. Collingsworth, Joel C. Hoffman, Mark D. Rowe, Wendylee Stott, Amanda Susanne Ackiss, Edward S. Rutherford
Design and function of the Autonomous Benthic Imaging and Surveying System (ABISS) for remote sensing of lake and seabed environments Design and function of the Autonomous Benthic Imaging and Surveying System (ABISS) for remote sensing of lake and seabed environments
Lake and seabed environments are home to fisheries and other biota that are important to ecosystems and economies, yet these environments and the species that use them are difficult to accurately assess and monitor. Traditional benthic survey techniques, like bottom trawling used by the U.S. Geological Survey, are limited by substrate constraints, poor spatial resolution and precision...
Authors
Alden T. Tilley, Peter C. Esselman, Christopher Roussi, Ben Hart, Aaron Lyons, Anthony J. Arnold, Jeremy Childress, Charley Weller
Design and functionality analysis of the high-stress permeameter (HSP), a device developed for measuring mechanical and hydraulic properties of gas hydrate-bearing pressure core Design and functionality analysis of the high-stress permeameter (HSP), a device developed for measuring mechanical and hydraulic properties of gas hydrate-bearing pressure core
To characterize sediment compressibility and permeability in the presence of gas hydrate, a naturally occurring combination of water and methane that requires elevated pressure and reduced temperature to remain stable, a high-stress permeameter (HSP) device was developed. The HSP was designed to accept gas hydrate-bearing pressure core specimens in their plastic liner at pressures of 10...
Authors
William F. Waite, Adrian Garcia
Designing biosurveillance using target analysis for a cryptic invasive species, the brown treesnake (Boiga irregularis) Designing biosurveillance using target analysis for a cryptic invasive species, the brown treesnake (Boiga irregularis)
Biosurveillance is especially important for invasive species that are difficult to control or remove once established. Target analysis, or the strategic evaluation of factors that affect or improve detection of organisms, is one approach to improve biosurveillance over time. Due to their ecologically and economically devastating effects, brown treesnakes (Boiga irregularis), an invasive...
Authors
Melia G. Nafus, Marijoy C Viernes, W. Trey Dunn, Jennifer A. Fike, Sara J. Oyler-McCance, Joseph Cruz
Detecting bumble bees in the wild using environmental DNA: Development and validation of a qPCR assay for the endangered Franklin’s bumble bee (Bombus franklini) Detecting bumble bees in the wild using environmental DNA: Development and validation of a qPCR assay for the endangered Franklin’s bumble bee (Bombus franklini)
Environmental DNA (eDNA) sampling is a noninvasive alternative to conventional methods of surveying insects that may be particularly useful for detecting pollinators. We developed a quantitative polymerase chain reaction (qPCR) assay to detect the DNA of Franklin’s bumble bee (Bombus franklini) from flower samples and conducted an initial test of the assay using samples collected within...
Authors
Michaela Ray Grossklaus, David S. Pilliod, Stephen Frank Spear, Matthew B B. Laramie, Akhil Kholwadwala, Amanda Jean Boone, Yer Lor, Marissa Kaminski, Jeffrey G. Everett
Detecting earthquakes in noisy real-time GNSS data with deep learning for improved PGD magnitude estimation Detecting earthquakes in noisy real-time GNSS data with deep learning for improved PGD magnitude estimation
To disseminate accurate and useful warnings, earthquake early warning (EEW) systems must quickly determine the size and location of an earthquake to estimate expected shaking. Traditional seismic‐based algorithms tend to underestimate the true magnitudes of large earthquakes, a phenomenon known as magnitude saturation. This limitation motivated the recent inclusion of Global Navigation...
Authors
Sydney N. Dybing, Diego Melgar, Amanda M. Thomas, Dara Elyse Goldberg, David Mencin, Brendan W. Crowell