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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse more than 82,000 reports authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
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Pesticide occurrence in shallow groundwater in three regions of agricultural land use: Baldwin County, the Wiregrass region, and the Tennessee River valley region of Alabama, 2009–20 Pesticide occurrence in shallow groundwater in three regions of agricultural land use: Baldwin County, the Wiregrass region, and the Tennessee River valley region of Alabama, 2009–20
As part of a cooperative investigation between the U.S. Geological Survey and the Alabama Department of Agriculture and Industries, a network of 22 groundwater wells were sampled from 2014 through 2020 for about 230 pesticide and pesticide degradate compounds. Wells were located in three regions of intensive agricultural land use in Alabama: Baldwin County, the Wiregrass region, and the...
Authors
Amy C. Gill
Introduction to recommended capabilities and instrumentation for volcano monitoring in the United States Introduction to recommended capabilities and instrumentation for volcano monitoring in the United States
Authors
Ashton F. Flinders, Jacob B. Lowenstern, Michelle L. Coombs, Michael P. Poland
Seismic techniques and suggested instrumentation to monitor volcanoes Seismic techniques and suggested instrumentation to monitor volcanoes
Authors
Weston A. Thelen, John J. Lyons, Aaron G. Wech, Seth C. Moran, Matthew M. Haney, Ashton F. Flinders
Special topic—Rapid-response instrumentation Special topic—Rapid-response instrumentation
Introduction
Authors
Ashton F. Flinders
Special topic—Unoccupied aircraft systems Special topic—Unoccupied aircraft systems
Introduction
Authors
Angela K. Diefenbach
Special topic—Boreholes Special topic—Boreholes
Authors
Shaul Hurwitz, Jacob B. Lowenstern
Special topic—Eruption plumes and clouds Special topic—Eruption plumes and clouds
chapter G, this volume; Orr and others, 2024), (3) weather radar, (4) volcanic lightning detection, and (5) ground-based ash sensors and sampling. Explosive eruptions can be detected by a variety of geophysical monitoring, including infrasound (see chapter C, this volume; Lyons and others, 2024) and seismicity (see chapter B, this volume; Thelen and others, 2024). However, those methods...
Authors
David J. Schneider, Alexa R. Van Eaton
Monitoring marine eruptions Monitoring marine eruptions
Authors
Gabrielle Tepp
Monitoring lahars Monitoring lahars
Authors
Weston A. Thelen, John J. Lyons, Alexandra M. Iezzi, Seth C. Moran
Tracking surface changes caused by volcanic activity Tracking surface changes caused by volcanic activity
chapter L, this volume; Diefenbach, 2024).
Authors
Tim R. Orr, Hannah R. Dietterich, Michael P. Poland
Streams, springs, and volcanic lakes for volcano monitoring Streams, springs, and volcanic lakes for volcano monitoring
chapter K, this volume, on boreholes; Hurwitz and Lowenstern, 2024). Although inferred to be common, relatively few volcano-hydrology anomalies are well documented, and many are essentially anecdotal (Newhall and others, 2001), reflecting the fact that high-resolution time series remain rare. Extreme examples include the 2008 eruption of Nevado del Huila, Colombia, where relatively minor
Authors
Steven E. Ingebritsen, Shaul Hurwitz
Volcanic gas monitoring Volcanic gas monitoring
Authors
Jennifer L. Lewicki, Christoph Kern, Peter J. Kelly, Patricia A. Nadeau, Tamar Elias, Laura E. Clor