Reports
Science Quality and Integrity
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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Distribution and transmission of the highly pathogenic parasite Ichthyophonus in marine fishes of Alaska Distribution and transmission of the highly pathogenic parasite Ichthyophonus in marine fishes of Alaska
A combination of field surveys, molecular typing, and laboratory experiments were used to improve our understanding of the distribution and transmission mechanisms of fish parasites in the genus Ichthyophonus. Ichthyophonus spp. infections were detected from the Bering Sea to the coast of Oregon in 10 of 13 host species surveyed. Sequences of rDNA extracted from these isolates indicate...
Authors
Jacob L. Gregg, Courtney A. Grady, Rachel L. Thompson, Maureen K. Purcell, Carolyn S. Friedman, Paul K. Hershberger
Documentation for the 2014 update of the United States national seismic hazard maps Documentation for the 2014 update of the United States national seismic hazard maps
The national seismic hazard maps for the conterminous United States have been updated to account for new methods, models, and data that have been obtained since the 2008 maps were released (Petersen and others, 2008). The input models are improved from those implemented in 2008 by using new ground motion models that have incorporated about twice as many earthquake strong ground shaking...
Authors
Mark D. Petersen, Morgan P. Moschetti, Peter M. Powers, Charles S. Mueller, Kathleen M. Haller, Arthur D. Frankel, Yuehua Zeng, Sanaz Rezaeian, Stephen C. Harmsen, Oliver S. Boyd, Edward H. Field, Rui Chen, Kenneth S. Rukstales, Nico Luco, Russell L. Wheeler, Robert A. Williams, Anna H. Olsen
Documentation for the U.S. Geological Survey Public-Supply Database (PSDB): A database of permitted public-supply wells, surface-water intakes, and systems in the United States Documentation for the U.S. Geological Survey Public-Supply Database (PSDB): A database of permitted public-supply wells, surface-water intakes, and systems in the United States
The U.S. Geological Survey (USGS) has developed a database containing information about wells, surface-water intakes, and distribution systems that are part of public water systems across the United States, its territories, and possessions. Programs of the USGS such as the National Water Census, the National Water Use Information Program, and the National Water-Quality Assessment Program...
Authors
Curtis V. Price, Molly A. Maupin
Documentation of a groundwater flow model (SJRRPGW) for the San Joaquin River Restoration Program study area, California Documentation of a groundwater flow model (SJRRPGW) for the San Joaquin River Restoration Program study area, California
To better understand the potential effects of restoration flows on existing drainage problems, anticipated as a result of the San Joaquin River Restoration Program (SJRRP), the U.S. Geological Survey (USGS), in cooperation with the U.S. Bureau of Reclamation (Reclamation), developed a groundwater flow model (SJRRPGW) of the SJRRP study area that is within 5 miles of the San Joaquin River...
Authors
Jonathan A. Traum, Steven P. Phillips, George L. Bennett, Celia Zamora, Loren F. Metzger
DOI remote sensing activities 2014 DOI remote sensing activities 2014
No abstract available.
Authors
Gregory I. Snyder
DOI/GTN-P climate and active-layer data acquired in the National Petroleum Reserve-Alaska and the Arctic National Wildlife Refuge DOI/GTN-P climate and active-layer data acquired in the National Petroleum Reserve-Alaska and the Arctic National Wildlife Refuge
This report provides data collected by the climate monitoring array of the U.S. Department of the Interior on Federal lands in Arctic Alaska over the period August 1998 to July 2013; this array is part of the Global Terrestrial Network for Permafrost, (DOI/GTN-P). In addition to presenting data, this report also describes monitoring, data collection, and quality-control methods. This...
Authors
Frank E. Urban, Gary D. Clow
DOI/GTN-P climate and active-layer data acquired in the National Petroleum Reserve: Alaska and the Arctic National Wildlife Refuge, 1998-2011 DOI/GTN-P climate and active-layer data acquired in the National Petroleum Reserve: Alaska and the Arctic National Wildlife Refuge, 1998-2011
This report provides data collected by the climate monitoring array of the U.S. Department of the Interior on Federal lands in Arctic Alaska over the period August 1998 to July 2011; this array is part of the Global Terrestrial Network for Permafrost, (DOI/GTN-P). In addition to presenting data, this report also describes monitoring, data collection, and quality-control methodology. This...
Authors
Frank E. Urban, Gary D. Clow
Double-crested Cormorant studies at Little Galloo Island, Lake Ontario in 2013: Diet composition, fish consumption and the efficacy of management activities in reducing fish predation Double-crested Cormorant studies at Little Galloo Island, Lake Ontario in 2013: Diet composition, fish consumption and the efficacy of management activities in reducing fish predation
For almost two decades Little Galloo Island (LGI) has supported a large colony of Double-crested Cormorants (Phalacrocorax auritus) in the eastern basin of Lake Ontario. Cormorant nest counts on the island since the early 1990's have averaged 4,297 per year. However, less than 2,000 pairs have nested on the island in three of the past five years. The highest count was reached in 1996...
Authors
James H. Johnson, Russ D. McCullough, Irene Mazzocchi
Downscaled climate projections for the Southeast United States: evaluation and use for ecological applications Downscaled climate projections for the Southeast United States: evaluation and use for ecological applications
Climate change is likely to have many effects on natural ecosystems in the Southeast U.S. The National Climate Assessment Southeast Technical Report (SETR) indicates that natural ecosystems in the Southeast are likely to be affected by warming temperatures, ocean acidification, sea-level rise, and changes in rainfall and evapotranspiration. To better assess these how climate changes...
Authors
Adrienne Wootten, Kara Smith, Ryan Boyles, Adam Terando, Lydia Stefanova, Vasru Misra, Tom Smith, David L. Blodgett, Fredrick Semazzi
Drilling and geophysical logs of the tophole at an oil-and-gas well site, Central Venango County, Pennsylvania Drilling and geophysical logs of the tophole at an oil-and-gas well site, Central Venango County, Pennsylvania
In a study conducted by the U.S. Geological Survey, in cooperation with the Pennsylvania Department of Conservation and Natural Resources, Bureau of Topographic and Geologic Survey, drilling and geophysical logs were used to characterize the geohydrologic framework and the freshwater and saline-water zones penetrated by the tophole at an oil-and-gas well site in central Venango County
Authors
John H. Williams, Philip H. Bird, Randall W. Conger, J. Alton Anderson
Dynamics and ecological consequences of the 2013−2014 koa moth outbreak at Hakalau Forest National Wildlife Refuge. Dynamics and ecological consequences of the 2013−2014 koa moth outbreak at Hakalau Forest National Wildlife Refuge.
A massive outbreak of the koa moth (Geometridea: Scotorythra paludicola) defoliated more than a third of the koa (Acacia koa) forest on Hawai‘i Island during 2013−2014. This was the largest koa moth outbreak ever recorded and the first on the island since 1953. The outbreak spread to sites distributed widely around the island between 800−2,000 m elevation and in wet rainforest to dry...
Authors
Paul C. Banko, Robert W. Peck, Stephanie G. Yelenik, Eben H. Paxton, Frank J. Bonaccorso, Kristina Montoya-Aiona, David Foote
EAARL-B coastal topography: eastern New Jersey, Hurricane Sandy, 2012: first surface EAARL-B coastal topography: eastern New Jersey, Hurricane Sandy, 2012: first surface
These remotely sensed, geographically referenced elevation measurements of lidar-derived first-surface (FS) topography datasets were produced by the U.S. Geological Survey (USGS), St. Petersburg Coastal and Marine Science Center, St. Petersburg, Florida. This project provides highly detailed and accurate datasets for a portion of the New Jersey coastline beachface, acquired pre-Hurricane...
Authors
C. Wayne Wright, Xan Fredericks, Rodolfo J. Troche, Emily S. Klipp, Christine J. Kranenburg, David B. Nagle