Paleomagnetic study of late Miocene through Pleistocene igneous rocks from the southwestern USA: Results from the historic collections of the U.S. Geological Survey Menlo Park laboratory
Edward A. Mankinen
2008, Geochemistry, Geophysics, Geosystems (9) 1-27
Seventy sites from the southwestern United States provide paleomagnetic results that meet certain minimum criteria and can be considered for the Time‐Averaged Field Initiative (TAFI). The virtual geomagnetic poles for these 70 units are circularly distributed, and their mean is nearly coincident with the rotational axis. When other published data...
Water-Quality and Fish-Community Data for the Niobrara National Scenic River, Nebraska, 2003-05
Benjamin Dietsch
2008, Fact Sheet 2007-3098
In 1991, a 76-mile reach of the Niobrara River in north-central Nebraska was designated as a National Scenic River (NSR). This reach of the river hosts a unique ecosystem that provides habitat for a diverse fish and wildlife population that include several threatened and endangered species. The Niobrara NSR also...
Hemlock ecosystem monitoring in southern West Virginia
Petra Bohall Wood, John H. Perez, John M. Wood
2008, Conference Paper, Fourth symposium on hemlock woolly adelgid in the eastern United States
We initiated a long-term hemlock ecosystem monitoring study in 1998 on the New River Gorge National River (NERI) and Gauley River National Recreation Area (GARI), in Nicholas, Fayette, and Raleigh counties, West Virginia, to quantify ecosystem response to invasion by the hemlock woolly adelgid (HWA). Hemlock vigor and degree of...
Radiative forcing over the conterminous United States due to contemporary land cover land use albedo change
Christopher Barnes, David P. Roy
2008, Geophysical Research Letters (35)
Recently available satellite land cover land use (LCLU) and albedo data are used to study the impact of LCLU change from 1973 to 2000 on surface albedo and radiative forcing for 36 ecoregions covering 43% of the conterminous United States (CONUS). Moderate Resolution Imaging Spectroradiometer (MODIS) snow-free broadband albedo values...
Finding concealed active faults: Extending the southern Whidbey Island fault across the Puget Lowland, Washington
Brian L. Sherrod, Richard J. Blakely, Craig S. Weaver, Harvey M. Kelsey, Elizabeth Barnett, Lee Liberty, Karen L. Meagher, Kristin Pape
2008, Journal of Geophysical Research B: Solid Earth (113) -
The southern Whidbey Island fault zone (SWIF), as previously mapped using borehole data, potential field anomalies, and marine seismic reflection surveys, consists of three subparallel, northwest trending strands extending ∼100 km from near Vancouver Island to the northern Puget Lowland. East of Puget Sound, the SWIF makes landfall between the...
Dissolved-solids transport in surface water of the Muddy Creek Basin, Utah
Steven J. Gerner
2008, Scientific Investigations Report 2008-5001
Muddy Creek is located in the southeastern part of central Utah and is a tributary of the Dirty Devil River, which, in turn, is a tributary of the Colorado River. Dissolved solids transported from the Muddy Creek Basin may be stored in the lower Dirty Devil River Basin, but are...
Water Availability--The Connection Between Water Use and Quality
Robert M. Hirsch, Pixie A. Hamilton, Timothy L. Miller, Donna N. Myers
2008, Fact Sheet 2008-3015
Water availability has become a high priority in the United States, in large part because competition for water is becoming more intense across the Nation. Population growth in many areas competes with demands for water to support irrigation and power production. Cities, farms, and power plants compete for water needed...
Pesticides in air and rainwater in the midcontinental United States, 1995: Methods and data
Michael S. Majewski, William T. Foreman, Richard H. Coupe, Donald A. Goolsby, Frank W. Wiebe
2008, Open-File Report 2007-1369
Weekly composite high-volume air and wet-only deposition samples were collected from April through September 1995 at paired urban and agricultural areas in Mississippi, Iowa, and Minnesota, and at a background site in Michigan's Upper Peninsula. This report describes the methods used to collect, analyze, and quality assure the samples, and...
Cascadia Subduction Zone
Arthur D. Frankel, Mark D. Petersen
2008, Open-File Report 2007-1437-L
The geometry and recurrence times of large earthquakes associated with the Cascadia Subduction Zone (CSZ) were discussed and debated at a March 28-29, 2006 Pacific Northwest workshop for the USGS National Seismic Hazard Maps. The CSZ is modeled from Cape Mendocino in California to Vancouver Island in British Columbia. We include...
Paleoseismic Investigations of the Walnut Site on the San Jacinto Fault
T. E. Fumal, K.J. Kendrick
2008, Open-File Report 2007-1437-O
The Walnut paleoseismic site is located along the northern San Jacinto fault about 3 km southeast of the San Bernardino, California city center (Figures 1, 2). More than 340 meters of trenches were excavated across the fault zone at this site as part of an Alquist-Priolo fault study (Figure 3)....
Compilation of surface creep on California faults and comparison of WGCEP 2007 deformation model to Pacific-North American plate Mmtion
Beth A. Wisely, David A. Schmidt, Ray J. Weldon II
2008, Open-File Report 2007-1437-P
This Appendix contains 3 sections that 1) documents published observations of surface creep on California faults, 2) constructs line integrals across the WG-07 deformation model to compare to the Pacific - North America plate motion, and 3) constructs strain tensors of volumes across the WG-07 deformation model to compare to...
Temporal Differences in the Hydrologic Regime of the Lower Platte River, Nebraska, 1895-2006
Daniel Ginting, Ronald B. Zelt, Joshua I. Linard
2008, Scientific Investigations Report 2007-5267
In cooperation with the Lower Platte South Natural Resources District for a collaborative study of the cumulative effects of water and channel management practices on stream and riparian ecology, the U.S. Geological Survey (USGS) compiled, analyzed, and summarized hydrologic information from long-term gaging stations on the lower Platte River to...
A-priori rupture models for Northern California Type-A faults
Chris J. Wills, Ray J. Weldon II, Edward H. Field
2008, Open-File Report 2007-1437-K
This appendix describes how a-priori rupture models were developed for the northern California Type-A faults. As described in the main body of this report, and in Appendix G, “a-priori” models represent an initial estimate of the rate of single and multi-segment surface ruptures on each fault. Whether or not a...
Flood-plain study of the Upper Iowa River in the vicinity of Decorah, Iowa
Daniel E. Christiansen, David A. Eash
2008, Scientific Investigations Map 3005
The city of Decorah, Iowa, has experienced severe flooding from the Upper Iowa River resulting in property damage to homes and businesses. Streamflow data from two U.S. Geological Survey (USGS) streamflow-gaging stations, the Upper Iowa River at Decorah, Iowa (station number 05387500), located upstream from the College Drive bridge; and...
Conditional, time-dependent probabilities for segmented Type-A faults in the WGCEP UCERF 2
Edward H. Field, Vipin Gupta
2008, Open-File Report 2007-1437-N
This appendix presents elastic-rebound-theory (ERT) motivated time-dependent probabilities, conditioned on the date of last earthquake, for the segmented type-A fault models of the 2007 Working Group on California Earthquake Probabilities (WGCEP). These probabilities are included as one option in the WGCEP?s Uniform California Earthquake Rupture Forecast 2 (UCERF 2), with...
Empirical estimation of regional time variation in seismicity rates
Karen R. Felzer
2008, Open-File Report 2007-1437-M
No abstract available. ...
A geomechanical approach for the genesis of sediment undulations on the Adriatic shelf
Nabil Sultan, Antonio Cattaneo, Roger Urgeles, Homa Lee, Jacques Locat, Fabio Trincardi, Serge Berne, Miquel Canals, Sara Lafuerza
2008, Geochemistry, Geophysics, Geosystems (9)
This study is among the first to examine the genesis of the seafloor and subsurface undulations on the Adriatic continental shelf by integrating stratigraphic information and in situ and laboratory geotechnical measurements. Interpretation of sediment behavior is based on a 32-m-long borehole crossing (1) a possible shear plane and (2)...
Pacific Ocean and Cenozoic evolution of climate
Mitchell Lyle, John A. Barron, Timothy J. Bralower, Matthew Huber, Annette Olivarez Lyle, A. C. Ravelo, David K. Rea, Paul A. Wilson
2008, Reviews of Geophysics (46)
The Pacific Ocean has played a major role in climate evolution throughout the Cenozoic (65–0 Ma). It is a fundamental component of global heat transport and circulation, the dominant locus of primary productivity, and, consequently, the largest reservoir for carbon exchange between the oceans and the atmosphere. A satisfactory understanding...
Calculating California seismicity rates
Karen R. Felzer
2008, Open-File Report 2007-1437-I
Empirically the rate of earthquakes = magnitude M is well fit by the Gutenberg-Richter relationship, logN=a-bM (1) where N is the number of earthquakes = M over a given time period, a is the number of M = 0 earthquakes over the same period, and b is a parameter that...
Monte Carlo method for determining earthquake recurrence parameters from short paleoseismic catalogs: Example calculations for California
Tom Parsons
2008, Open-File Report 2007-1437-C
Paleoearthquake observations often lack enough events at a given site to directly define a probability density function (PDF) for earthquake recurrence. Sites with fewer than 10-15 intervals do not provide enough information to reliably determine the shape of the PDF using standard maximum-likelihood techniques [e.g., Ellsworth et al., 1999]. In...
Summary of geologic data and development of A Priori Rupture Models for the Elsinore, San Jacinto, and Garlock faults
Timothy E. Dawson, Tom K. Rockwell, Ray J. Weldon II, Chris J. Wills
2008, Open-File Report 2007-1437-F
This appendix to the WGCEP Earthquake Rate Model 2 summarizes geologic data and documents the development of the rupture models for the Elsinore, San Jacinto, and Garlock faults. For the summary of available geologic data, the documentation is organized by fault and fault segment and includes a summary of slip...
California fault parameters for the National Seismic Hazard Maps and Working Group on California Earthquake Probabilities 2007
Chris J. Wills, Ray J. Weldon II, W. A. Bryant
2008, Open-File Report 2007-1437-A
This report describes development of fault parameters for the 2007 update of the National Seismic Hazard Maps and the Working Group on California Earthquake Probabilities (WGCEP, 2007). These reference parameters are contained within a database intended to be a source of values for use by scientists interested in producing either...
Earthquake Rate Model 2 of the 2007 working group for California earthquake probabilities, magnitude-area relationships
Ross S. Stein
2008, Open-File Report 2007-1437-D
The Working Group for California Earthquake Probabilities must transform fault lengths and their slip rates into earthquake moment-magnitudes. First, the down-dip coseismic fault dimension, W, must be inferred. We have chosen the Nazareth and Hauksson (2004) method, which uses the depth above which 99% of the background seismicity occurs to...
Spatial seismicity rates and maximum magnitudes for background earthquakes
Mark D. Petersen, Charles S. Mueller, Arthur D. Frankel, Yuehua Zeng
2008, Open-File Report 2007-1437-J
The background seismicity model is included to account for M 5.0 - 6.5 earthquakes on faults and for random M 5.0 ? 7.0 earthquakes that do not occur on faults included in the model (as in earlier models of Frankel et al., 1996, 2002 and Petersen et al., 1996). We...
WGCEP historical California earthquake catalog
Karen R. Felzer, Tianqing Cao
2008, Open-File Report 2007-1437-H
This appendix provides an earthquake catalog for California and the surrounding area. Our goal is to provide a listing for all known M > 5.5 earthquakes that occurred from 1850-1932 and all known M > 4.0 earthquakes that occurred from 1932-2006 within the region of 31.0 to 43.0 degrees North...
