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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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Filter Total Items: 175531

Capturing the uncertainty of seismicity observations in earthquake rate estimates: Implications for probabilistic seismic hazard analysis and the USGS National Seismic Hazard Model Capturing the uncertainty of seismicity observations in earthquake rate estimates: Implications for probabilistic seismic hazard analysis and the USGS National Seismic Hazard Model

The rate of earthquakes in a region is a fundamental input to Probabilistic Seismic Hazard Analysis. We present a Monte Carlo method for computing that rate from seismicity catalogs while including a range of data and analysis uncertainties. This method is applied to regions for which the b value is assumed to be spatially invariant. Each region is broken down into epochs for which each...
Authors
Andrew J. Michael, Andrea L. Llenos
By
Natural Hazards Mission Area, Earthquake Hazards Program, Earthquake Science Center

Neotectonic origins for the Meadow Bank scarp, Wabash Valley seismic zone USA Neotectonic origins for the Meadow Bank scarp, Wabash Valley seismic zone USA

The Meadow Bank scarp (MBS) in southeastern Illinois is a linear geomorphic expression, ∼10 km long and ∼8 m high above a relatively flat landscape. It parallels an underlying northeast‐oriented Late‐Precambrian–Early‐Cambrian structural fabric, called the Wabash Valley fault zone, and is within an area of modern, historic, and paleo seismicity, called the Wabash Valley seismic zone. In...
Authors
Edward W Woolery, William J. Stephenson, Kevin Woller, Alena L. Leeds, Noah Silas Lindberg, Jackson K. Odum, Cooper Cearley, Ron Counts
By
Geologic Hazards Science Center

Evaluating hydrologic data products for scientific and management applications related to potential future streamflow conditions in the Upper Mississippi and Illinois Rivers Evaluating hydrologic data products for scientific and management applications related to potential future streamflow conditions in the Upper Mississippi and Illinois Rivers

The hydrology of the Upper Mississippi and Illinois Rivers is a fundamental driver of ecosystem patterns and processes across a large portion of the United States. Quantitative hydrologic data for the main stems of these rivers underlie numerous scientific investigations, statistical models, and decision-making processes for local, State, and Federal agencies involved in the Upper...
Authors
Molly Van Appledorn, Lucie Sawyer, John T. Delaney, Chanel Mueller, Leigh Youngblood, Jane Harrell, Brian Breaker, Chris Frans
By
Ecosystems Mission Area, Upper Midwest Environmental Sciences Center

Natural source zone depletion of crude oil in the subsurface: Processes controlling mass losses of individual compounds Natural source zone depletion of crude oil in the subsurface: Processes controlling mass losses of individual compounds

At many petroleum hydrocarbon spill sites, residual spilled product forms a long-term source of groundwater contamination. The phrase source zone natural depletion is used to refer to the mass loss rates. Overall mass lost under environmental conditions was analyzed using conservative biomarker concentrations for a 1979 oil spill in northern Minnesota, USA. After 40–41 years, an average...
Authors
Barbara Bekins, William Herkelrath
By
Water Resources Mission Area

Effect of passive integrated transponder tag size on survival, tag loss, and growth of Santa Ana Sucker Effect of passive integrated transponder tag size on survival, tag loss, and growth of Santa Ana Sucker

Objective The Santa Ana Sucker Pantosteus santaanae is endemic to southern California and is listed as threatened under the U.S. Endangered Species Act. Seasonal limitations on conventional sampling and inconsistencies in survey methodologies have led to an incomplete understanding of population dynamics. Alternative sampling methods have the potential to fill important knowledge gaps in...
Authors
Jordan Mae-Jean Buxton, Marissa L. Wulff, Brock Huntsman, Kai Palenscar, Brett Mills, Kerwin Russell, Alicia Ruan, Tevin Bui
By
California Water Science Center

A comparative evaluation of bait types taken by brown treesnakes or other nontarget species, including ants A comparative evaluation of bait types taken by brown treesnakes or other nontarget species, including ants

Evaluating invasive species removal can help improve efficacy or application of control tools. Toxic baiting is a primary method used to suppress many invasive species, including the brown treesnake (Boiga irregularis) in Guam. Based on limited alternative approaches to assess tool efficacy in snake removal, bait take is often used as a proxy for snake removal, despite evidence that...
Authors
Melia G. Nafus, Amanda A Reyes, Bae S. Daria, Christiana-Jo Concepcion Quinata, Ross Miller
By
Ecosystems Mission Area, Pacific Island Ecosystems Research Center
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