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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Two hundred years of magma transport and storage at Kīlauea Volcano, Hawai'i, 1790-2008 Two hundred years of magma transport and storage at Kīlauea Volcano, Hawai'i, 1790-2008
This publication summarizes the evolution of the internal plumbing of Kīlauea Volcano on the Island of Hawaiʻi from the first documented eruption in 1790 to the explosive eruption of March 2008 in Halemaʻumaʻu Crater. For the period before the founding of the Hawaiian Volcano Observatory in 1912, we rely on written observations of eruptive activity, earthquake swarms, and periodic...
Authors
Thomas L. Wright, Fred W. Klein
U-Pb zircon age data for selected sedimentary, metasedimentary, and igneous rocks from northern and central Alaska U-Pb zircon age data for selected sedimentary, metasedimentary, and igneous rocks from northern and central Alaska
This publication contains the complete results of U-Pb zircon age dating studies of sedimentary and metasedimentary units from northern and central Alaska that are discussed and interpreted in other reports by the author. Most of the U-Pb ages are of detrital zircons from sandstones, although U-Pb ages from igneous and sedimentary clasts from conglomerates in some of those same units are...
Authors
Thomas E. Moore
U.S. Geological Survey external quality-assurance project report for the National Atmospheric Deposition Program / National Trends Network and Mercury Deposition Network, 2011-2012 U.S. Geological Survey external quality-assurance project report for the National Atmospheric Deposition Program / National Trends Network and Mercury Deposition Network, 2011-2012
The U.S. Geological Survey operated six distinct programs to provide external quality-assurance monitoring for the National Atmospheric Deposition Program (NADP) / National Trends Network (NTN) and Mercury Deposition Network (MDN) during 2011–2012. The field-audit program assessed the effects of onsite exposure, sample handling, and shipping on the chemistry of NTN samples; a system...
Authors
Gregory A. Wetherbee, RoseAnn Martin
U.S. Geological Survey Karst Interest Group Proceedings, Carlsbad, New Mexico, April 29-May 2, 2014 U.S. Geological Survey Karst Interest Group Proceedings, Carlsbad, New Mexico, April 29-May 2, 2014
Karst aquifer systems are present throughout parts of the United States and some of its territories, and have developed in carbonate rocks (primarily limestone and dolomite) that span an interval of time encompassing more than 550 million years. The depositional environments, diagenetic processes, post-depositional tectonic events, and geochemical weathering processes that form karst...
Authors
Eve L. Kuniansky, Lawrence E. Spangler
U.S. Geological Survey quality-assurance plan for continuous water-quality monitoring in Kansas, 2014 U.S. Geological Survey quality-assurance plan for continuous water-quality monitoring in Kansas, 2014
A quality-assurance plan for use in conducting continuous water-quality monitoring activities has been developed for the Kansas Water Science Center in accordance with guidelines set forth by the U.S. Geological Survey. This quality-assurance plan documents the standards, policies, and procedures used by the U.S. Geological Survey in Kansas for activities related to the collection...
Authors
Trudy J. Bennett, Jennifer L. Graham, Guy M. Foster, Mandy L. Stone, Kyle E. Juracek, Teresa J. Rasmussen, James E. Putnam
U.S. Geological Survey Science for the Wyoming Landscape Conservation Initiative - 2013 Annual Report U.S. Geological Survey Science for the Wyoming Landscape Conservation Initiative - 2013 Annual Report
This is the sixth report produced by the U.S. Geological Survey (USGS) for the Wyoming Landscape Conservation Initiative (WLCI) to detail annual activities conducted by USGS for addressing specific management needs identified by WLCI partners. In FY2013, there were 25 ongoing and new projects conducted by the USGS. These projects fall into 8 major categories: (1) synthesizing and...
Authors
Zachary H. Bowen, Cameron L. Aldridge, Patrick J. Anderson, Timothy J. Assal, Carleton R. Bern, Laura R Biewick, Gregory K. Boughton, Anna D. Chalfoun, Geneva W. Chong, Marie K. Dematatis, Bradley C. Fedy, Steven L. Garman, Steve Germaine, Matthew G. Hethcoat, Collin G. Homer, Christopher Huber, Matthew J. Kauffman, Natalie Latysh, Daniel J. Manier, Cynthia P. Melcher, Kirk A. Miller, Christopher J. Potter, Spencer Schell, Michael J. Sweat, Annika W. Walters, Anna B. Wilson
U.S. Geological Survey Science for the Wyoming Landscape Conservation Initiative: 2012 annual report U.S. Geological Survey Science for the Wyoming Landscape Conservation Initiative: 2012 annual report
Southwest Wyoming contains abundant energy resources, wildlife, habitat, open spaces, and outdoor recreational opportunities. Although energy exploration and development have been taking place in the region since the late 1800s, the pace of development for fossil fuels and renewable energy increased significantly in the early 2000s. This and the associated urban and exurban development...
Authors
Zachary H. Bowen, Cameron L. Aldridge, Patrick J. Anderson, Timothy J. Assal, Carleton R. Bern, Laura Biewick, Gregory K. Boughton, Natasha B. Carr, Anna D. Chalfoun, Geneva W. Chong, Melanie L. Clark, Bradford C. Fedy, Katharine Foster, Steven L. Garman, Steve Germaine, Matthew G. Hethcoat, Collin G. Homer, Matthew J. Kauffman, Douglas Keinath, Natalie Latysh, Daniel J. Manier, Robert R. McDougal, Cynthia P. Melcher, Kirk A. Miller, Jessica Montag, Christopher J. Potter, Spencer Schell, Sarah L. Shafer, David B. Smith, Michael J. Sweat, Anna B. Wilson
UCODE_2014, with new capabilities to define parameters unique to predictions, calculate w eights using simulated values, estimate parameters w ith SVD, evaluate uncertainty with MCMC, and more UCODE_2014, with new capabilities to define parameters unique to predictions, calculate w eights using simulated values, estimate parameters w ith SVD, evaluate uncertainty with MCMC, and more
No abstract available.
Authors
Eileen P. Poeter, Mary C. Hill, Dan Lu, Claire R. Tiedeman, Steffen W. Mehl
Uncertainty and extreme events in future climate and hydrologic projections for the Pacific Northwest: providing a basis for vulnerability and core/corridor assessments Uncertainty and extreme events in future climate and hydrologic projections for the Pacific Northwest: providing a basis for vulnerability and core/corridor assessments
The purpose of this project was to (1) provide an internally-consistent set of downscaled projections across the Western U.S., (2) include information about projection uncertainty, and (3) assess projected changes of hydrologic extremes. These objectives were designed to address decision support needs for climate adaptation and resource management actions. Specifically, understanding of
Authors
Jeremy S. Littell, Guillaume S. Mauger, Eric P. Salathe, Alan F. Hamlet, Se-Yeun Lee, Matt R. Stumbaugh, Marketa Elsner, Robert Norheim, Eric R. Lutz, Nathan J. Mantua
Unified facilities criteria 3-301-01: structural engineering Unified facilities criteria 3-301-01: structural engineering
This Unified Facility Criteria (UFC) provides requirements for structures designed and constructed for the Department of Defense (DoD). These technical requirements are based on the 2012 International Building Code (IBC 2012), as modified by UFC 1-200- 01. This information shall be used by structural engineers to develop design calculations, specifications, plans, and design-build...
Authors
Sean M. McGowan, Sanaz Rezaeian, Nicolas Luco
Updated estimates of long-term average dissolved-solids loading in streams and rivers of the Upper Colorado River Basin Updated estimates of long-term average dissolved-solids loading in streams and rivers of the Upper Colorado River Basin
The Colorado River and its tributaries supply water to more than 35 million people in the United States and 3 million people in Mexico, irrigating over 4.5 million acres of farmland, and annually generating about 12 billion kilowatt hours of hydroelectric power. The Upper Colorado River Basin, part of the Colorado River Basin, encompasses more than 110,000 mi2 and is the source of much...
Authors
Fred D. Tillman, David W. Anning
Updated study reporting levels (SRLs) for trace-element data collected for the California Groundwater Ambient Monitoring and Assessment (GAMA) Priority Basin Project, October 2009-March 2013 Updated study reporting levels (SRLs) for trace-element data collected for the California Groundwater Ambient Monitoring and Assessment (GAMA) Priority Basin Project, October 2009-March 2013
Groundwater samples have been collected in California as part of statewide investigations of groundwater quality conducted by the U.S. Geological Survey for the Groundwater Ambient Monitoring and Assessment (GAMA) Priority Basin Project (PBP). The GAMA-PBP is being conducted in cooperation with the California State Water Resources Control Board to assess and monitor the quality of...
Authors
Tracy A. Davis, Lisa D. Olsen, Miranda S. Fram, Kenneth Belitz