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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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Maintaining frog monitoring and population on the Las Cienegas National Conservation Area Maintaining frog monitoring and population on the Las Cienegas National Conservation Area

This report summarizes and analyzes the data collected on the Chiricahua Leopard Frog (CLF) populations on the Las Ciénegas National Conservation Area (LCNCA) in southeast Arizona, U.S.A., during the reporting period covered under this funding agreement from September 2020 through October 2024 and place this analysis in historical context of the previous monitoring efforts. The major...
Authors
Javan Mathias Bauder, Chris L. Prewitt, David Hall
By
Cooperative Research Units

Introduction to the special section on improving measurements of earthquake source parameters Introduction to the special section on improving measurements of earthquake source parameters

Earthquake source parameters such as magnitude, seismic moment, source dimension, stress drop, and radiated energy are fundamental to understanding earthquake physics, and are also key ingredients in earthquake ground‐motion modeling, rupture simulation, and statistical seismology. However, the uncertainties in these parameters estimated from the radiated seismic wavefield are large due...
Authors
Annemarie S. Baltay Sundstrom, Rachel E. Abercrombie, Adrien Oth, Takahiko Uchide
By
Natural Hazards Mission Area, Earthquake Hazards Program, Earthquake Science Center

Gillnet sampling methods for monitoring status and trends of Clear Lake Hitch in Clear Lake, Lake County, California Gillnet sampling methods for monitoring status and trends of Clear Lake Hitch in Clear Lake, Lake County, California

The Clear Lake Hitch (Lavinia exilicauda chi) is a minnow endemic to Clear Lake, Lake County, California. This species is listed as a threatened species under the California Endangered Species Act and has been petitioned for listing under the United States Endangered Species Act. In 2017, the U.S. Geological Survey, in cooperation with the U.S. Fish and Wildlife Service, initiated a...
Authors
Frederick Feyrer, Matthew J. Young, Brock Huntsman, Veronica Violette, Justin K. Clause, Jordan Buxton, Danielle Palm, Marissa L. Wulff, Jeff Gronemyer, Luis Santana
By
California Water Science Center

Utility of a swath laser rangefinder for characterizing mass movement flow depth and landslide initiation Utility of a swath laser rangefinder for characterizing mass movement flow depth and landslide initiation

Mass movements such as debris flows and landslides are some of the deadliest and most destructive natural hazards occurring mostly in alpine and volcanic settings. With ever-growing populations located downslope from known debris flow channels, early warning systems can help prevent loss of life. Geophysical and technological advances have improved monitoring and detection capabilities...
Authors
Maciej K. Obryk, Emily Christina Bedinger, Alexandra M. Iezzi, Emily H Bryant, Kate E. Allstadt, David L. George, Benjamin B. Mirus
By
Natural Hazards Mission Area, Volcano Hazards Program, Geologic Hazards Science Center, Volcano Science Center

An early Holocene wet period in the southwestern United States An early Holocene wet period in the southwestern United States

Multiple generations of spring-fed streams traversed ∼800 km2 of the Las Vegas Valley in southern Nevada between ca. 10.9 ka and 8.5 ka, depositing an extensive tufa network. The scale of this network and diversity of tufa morphologies is novel in North America and offers an opportunity to obtain quantitative paleoclimate data for the region during the early Holocene. We determined...
Authors
Kathleen B. Springer, Adam M. Hudson, Jeffrey S. Pigati, Katharine W. Huntington, Andrew J. Schauer
By
Ecosystems Land Change Science Program, Geosciences and Environmental Change Science Center

Spatially explicit capture-mark-recapture to evaluate demographic status of the Louisiana black bear Spatially explicit capture-mark-recapture to evaluate demographic status of the Louisiana black bear

Louisiana black bears (Ursus americanus luteolus) occur in semi-isolated fragments of bottomland hardwood forest in the lower Mississippi Alluvial Valley and were listed as threatened under the United States Endangered Species Act in 1992. A population viability analysis based on radio-telemetry and capture-mark-recapture (CMR) data collected from 2002 to 2012 revealed that the...
Authors
Joseph D. Clark, Heidi L. Adams, Ben Augustine, John R. Berry, Dustin Champagne, Maria Davidson, John Hanks, Jared S. Laufenberg, Sean M. Murphy
By
Ecosystems Mission Area, Northern Rocky Mountain Science Center
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