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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.
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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Analysis for agreement of the Northern Gulf of Mexico topobathymetric digital elevation model with 3-Dimensional Elevation Program 1/3 arc-second digital elevation models Analysis for agreement of the Northern Gulf of Mexico topobathymetric digital elevation model with 3-Dimensional Elevation Program 1/3 arc-second digital elevation models
Topographical differencing and edge-matching analyses were used to evaluate agreement of the Coastal National Elevation Database Applications Project’s Northern Gulf of Mexico topobathymetric digital elevation model (TBDEM) with The National Map 3-Dimensional Elevation Program (3DEP) 1/3 arc-second digital elevation models (DEMs). In addition to topographic map products provided through...
Authors
Cynthia Miller-Corbett
Seismological, geological, and geotechnical engineering aspects of the 2018 MW 6.6 Hokkaido Eastern Iburi earthquake Seismological, geological, and geotechnical engineering aspects of the 2018 MW 6.6 Hokkaido Eastern Iburi earthquake
The 2018 Hokkaido Eastern Iburi MW6.6 earthquake struck the southern coast of the north island of Japan in the early morning (3:08 AM JST) on September 6, 2018. The event had a hypocentral depth of 35 km, centered beneath the port city of Tomakomai. Extremely strong shaking with peak ground acceleration in excess of 0.5 g was felt in the communities directly north of Tomakomai, in the...
Authors
Robert Kayen, Brad Wham, Alex R. Grant, Mikami Atsushi, Donald Anderson, Paolo Zimmaro, Pengfei Wang, Yi Tyan Tsai, Jeff Bachhuber, Chris L M Madugo, Joseph Sun, Christopher S. Hitchcock, Matthew Motto
Spatial integration of biological and social objectives to identify priority landscapes for waterfowl habitat conservation Spatial integration of biological and social objectives to identify priority landscapes for waterfowl habitat conservation
Waterfowl population management and habitat conservation compose one of the oldest and most successful adaptive management frameworks in the world. Since its inception, the North American Waterfowl Management Plan (NAWMP) has emphasized strategically targeted conservation investments in regions that most affect waterfowl population dynamics. By 2012, regional conservation had...
Authors
Anastasia Krainyk, James E. Lyons, Michael G. Brasher, Dale D. Humburg, Greg J. Souilliere, John M. Coluccy, Mark J. Petrie, David W. Howerter, Stuart M. Slattery, Mindy B. Rice, Joe C. Fuller
When volcanoes fall down—Catastrophic collapse and debris avalanches When volcanoes fall down—Catastrophic collapse and debris avalanches
Despite their seeming permanence, volcanoes are prone to catastrophic collapse that can affect vast areas in a matter of minutes. Large collapses begin as gigantic landslides that quickly transform to debris avalanches—chaotically tumbling masses of rock debris that can sweep downslope at extremely high velocities, inundating areas far beyond the volcano. Rapid burial by the debris...
Authors
Lee Siebert, Mark E. Reid, James W. Vallance, Thomas C. Pierson
Monitoring long-term changes in forage fish distribution, abundance and body condition Monitoring long-term changes in forage fish distribution, abundance and body condition
We collected data on forage fish abundance, distribution and body condition in Prince William Sound, Alaska during summers in 2012 through 2016. This included acoustic – trawl surveys, aerial-acoustic surveys, opportunistic sampling where we encountered forage aggregations, and concurrent measurements of forage fish habitat. Acoustic indices of density suggest low abundance of age-0...
Authors
Mayumi L. Arimitsu, John F. Piatt
2018 USA National Phenology Annual Report 2018 USA National Phenology Annual Report
This report provides a very high-level summary of some of the USA-NPN’s accomplishments over the past year. The purpose is to share with USA-NPN funders, partners, and the general public the value of the organization.
Authors
Jake Weltzin, Theresa M. Crimmins
Basin, climatic, and irrigation factors associated with median summer water yields for streams in Southwestern Michigan, 1945-2015 Basin, climatic, and irrigation factors associated with median summer water yields for streams in Southwestern Michigan, 1945-2015
Median summer water yields and resultant flows for streams are used in Michigan to regulate large water withdrawals to help prevent negative effects on characteristic fish populations. Large water withdrawals commonly are associated with irrigation in rural areas. In an earlier statewide report, an index-flow statistic for the period of record, defined as the median flow during the...
Authors
David J. Holtschlag
Geology of the Cornwall Quadrangle, Virginia Geology of the Cornwall Quadrangle, Virginia
No abstract available.
Authors
Matthew J. Heller, Mark W. Carter, G.P. Wilkes, R.L. Coiner
Adult sockeye salmon (Oncorhynchus nerka) behavior and movement from Roza Dam to Cle Elum Dam, Washington, 2018 Adult sockeye salmon (Oncorhynchus nerka) behavior and movement from Roza Dam to Cle Elum Dam, Washington, 2018
An evaluation was conducted to describe adult sockeye salmon (Oncorhynchus nerka) upstream movement patterns from Roza Dam to Cle Elum Dam in the Yakima Basin, Washington. Sockeye salmon adults that arrive at Roza Dam are currently trapped and transported upstream of Cle Elum Dam because upstream fish-passage facilities are not currently in place at the dam. However, these facilities are...
Authors
Tobias J. Kock, Scott D. Evans, Brian K. Ekstrom, Amy C. Hansen
Flood-inundation maps for the Amite and Comite Rivers from State Highway 64 to U.S. Highway 190 at Central, Louisiana Flood-inundation maps for the Amite and Comite Rivers from State Highway 64 to U.S. Highway 190 at Central, Louisiana
Flood-inundation maps for a 14.5-mile reach of the Amite River and a 20.2-mile reach of the Comite River from State Highway 64 to U.S. Highway 190 were created by the U.S. Geological Survey (USGS) in cooperation with the City of Central, Louisiana. These maps, which can be accessed through an interactive mapper at the USGS Flood Inundation Mapping Program website and from a companion...
Authors
John B. Storm
Remote sensing of river flow in Alaska—New technology to improve safety and expand coverage of USGS streamgaging Remote sensing of river flow in Alaska—New technology to improve safety and expand coverage of USGS streamgaging
The U.S. Geological Survey monitors water level (water surface elevation relative to an arbitrary datum) and measures streamflow in Alaska rivers to compute and compile river flow records for use by water resource planners, engineers, and land managers to design infrastructure, manage floodplains, and protect life, property, and aquatic resources. Alaska has over 800,000 miles of rivers...
Authors
Jeff Conaway, John R. Eggleston, Carl J. Legleiter, John W. Jones, Paul J. Kinzel, John W. Fulton
The use of national datasets to produce an average annual water budget for the Mississippi Alluvial Plain, 2000–13 The use of national datasets to produce an average annual water budget for the Mississippi Alluvial Plain, 2000–13
Overview Water is a critically important resource for the Mississippi Alluvial Plain (MAP) region, supporting a multibillion-dollar agricultural industry. There are concerns that continued withdrawals of groundwater for irrigation may decrease future water supplies. The U.S. Geological Survey has a history of conducting research in the MAP region and recently began an effort to integrate...
Authors
Meredith Reitz, Wade H. Kress