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...
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)....
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...
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...
Overview of the Southern San Andreas Fault Model
Ray J. Weldon II, Glenn P. Biasi, Chris J. Wills, Timothy E. Dawson
2008, Open-File Report 2007-1437-E
This appendix summarizes the data and methodology used to generate the source model for the southern San Andreas fault. It is organized into three sections, 1) a section by section review of the geological data in the format of past Working Groups, 2) an overview of the rupture model, and...
Recurrence interval and event age data for Type A faults
Timothy E. Dawson, Ray J. Weldon II, Glenn P. Biasi
2008, Open-File Report 2007-1437-B
This appendix summarizes available recurrence interval, event age, and timing of most recent event data for Type A faults considered in the Earthquake Rate Model 2 (ERM 2) and used in the ERM 2 Appendix C analysis as well as Appendix N (time-dependent probabilities). These data have been compiled into...
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...
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...
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...
Sidescan-sonar imagery and surficial geologic interpretations of the sea floor in central Rhode Island Sound
K. Y. McMullen, L. J. Poppe, J. F. Denny, T.A. Haupt, J.M. Crocker
2008, Open-File Report 2007-1366
The U.S. Geological Survey (USGS) has been working with the National Oceanic and Atmospheric Administration (NOAA) to interpret the surficial geology of areas along the northeastern coast of the United States. During 2004, the NOAA Ship RUDE conducted Hydrographic Survey H11321 in Rhode Island Sound. This sidescan-sonar and bathymetry survey...
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...
Development of final a-fault rupture models for WGCEP/ NSHMP Earthquake Rate Model 2
Edward H. Field, Ray J. Weldon II, Thomas Parsons, Chris J. Wills, Timothy E. Dawson, Ross S. Stein, Mark D. Petersen
2008, Open-File Report 2007-1437-G
This appendix discusses how we compute the magnitude and rate of earthquake ruptures for the seven Type-A faults (Elsinore, Garlock, San Jacinto, S. San Andreas, N. San Andreas, Hayward-Rodgers Creek, and Calaveras) in the WGCEP/NSHMP Earthquake Rate Model 2 (referred to as ERM 2. hereafter). By definition, Type-A faults are...
Modified Mercalli Intensity Maps for the 1868 Hayward Earthquake Plotted in ShakeMap Format
John Boatwright, Howard Bundock
2008, Open-File Report 2008-1121
To construct the Modified Mercalli Intensity (MMI) ShakeMap for the 1868 Hayward earthquake, we started with two sets of damage descriptions and felt reports. The first set of 100 sites was compiled by A.A. Bullock in the Lawson (1908) report on the 1906 San Francisco earthquake. The second set of...
The Uniform California Earthquake Rupture Forecast, version 2 (UCERF 2)
2007 Working Group on California Earthquake Probabilities
2008, Open-File Report 2007-1437
California?s 35 million people live among some of the most active earthquake faults in the United States. Public safety demands credible assessments of the earthquake hazard to maintain appropriate building codes for safe construction and earthquake insurance for loss protection. Seismic hazard analysis begins with an earthquake rupture forecast?a model...
Publications of the Volcano Hazards Program 2006
Manuel Nathenson
2008, Open-File Report 2008-1006
The Volcano Hazards Program of the U.S. Geological Survey (USGS) is part of the Geologic Hazards Assessments subactivity as funded by Congressional appropriation. Investigations are carried out in the Geology and Hydrology Disciplines of the USGS and with cooperators at the Alaska Division of Geological and Geophysical Surveys, University of...
Modeling Soil Moisture in the Mojave Desert
David M. Miller, Debra Hughson, Kevin M. Schmidt
2008, Open-File Report 2008-1100
The Mojave Desert is an arid region of southeastern California and parts of Nevada, Arizona, and Utah; the desert occupies more than 25,000 square miles (fig. 1). Ranging from below sea level to over 5,000 feet (1,524 m) in elevation, the Mojave Desert is considered a ?high desert.? On the...
Major and EDXRF Trace Element Chemical Analyses of Volcanic Rocks from Lassen Volcanic National Park and Vicinity, California
Michael A. Clynne, L.J.P. Muffler, D. F. Siems, J.E. Taggart Jr., Peggy Bruggman
2008, Open-File Report 2008-1091
This open-file report presents WDXRF major-element chemical data for late Pliocene to Holocene volcanic rocks collected from Lassen Volcanic National Park and vicinity, California. Data for Rb, Sr, Ba, Y, Zr, Nb, Ni, Cr, Zn and Cu obtained by EDXRF are included for many samples. Data are presented in an...
Geochemical data for samples collected in 2007 near the concealed pebble porphyry Cu-Au-Mo deposit, southwest Alaska
David L. Fey, Matthew Granitto, Stuart A. Giles, Steven M. Smith, Robert G. Eppinger, Karen D. Kelley
2008, Open-File Report 2008-1132
In the summer of 2007, the U.S. Geological Survey (USGS) began an exploration geochemical research study over the Pebble porphyry copper-gold-molydenum (Cu-Au-Mo) deposit in southwest Alaska. The Pebble deposit is extremely large and is almost entirely concealed by tundra, glacial deposits, and post-Cretaceous volcanic and volcaniclastic rocks. The deposit is...
Preliminary Toxicological Analysis of the Effect of Coal Slurry Impoundment Water on Human Liver Cells
Joseph E. Bunnell
2008, Open-File Report 2008-1143
Coal is usually 'washed' with water and a variety of chemicals to reduce its content of sulfur and mineral matter. The 'washings' or 'coal slurry' derived from this process is a viscous black liquid containing fine particles of coal, mineral matter, and other dissolved and particulate substances. Coal slurry may...
Traveltime data for the Truckee River between Tahoe City, California, and Vista, Nevada, 2006 and 2007
E. James Crompton
2008, Open-File Report 2008-1084
Traveltime measurements were made during 2006 and 2007 along the Truckee River between Tahoe City, Calif., and Vista, Nev. Fluorescent rhodamine WT dye was injected at various locations along the river during streamflows ranging from 143 to 2,660 cubic feet per second. The resulting data, presented in tabular and graphic...
Methods and sources of data used to develop selected water-quality indicators for streams and ground water for EPA's 2007 Report on the Environment: Science report
Nancy T. Baker, John T. Wilson, Michael J. Moran
2008, Open-File Report 2008-1096
The U.S. Geological Survey (USGS) was one of numerous governmental agencies, private organizations, and the academic community that provided data and interpretations for the U.S. Environmental Protection Agency’s (USEPA) 2007 Report on the Environment: Science Report. This report documents the sources of data and methods used to develop selected water–quality indicators...
Potentiometric Surface of the Upper Floridan Aquifer, West-Central Florida, May 2007
A.G. Ortiz
2008, Open-File Report 2007-1380
The Floridan aquifer system consists of the Upper and Lower Floridan aquifers separated by the middle confining unit. The middle confining unit and the Lower Floridan aquifer in west-central Florida generally contain highly mineralized water. The water-bearing units containing fresh water are herein referred to as the Upper Floridan aquifer....
Potentiometric Surface of the Upper Floridan Aquifer, West-Central Florida, September 2007
A.G. Ortiz
2008, Open-File Report 2008-1105
The Floridan aquifer system consists of the Upper and Lower Floridan aquifers separated by the middle confining unit. The middle confining unit and the Lower Floridan aquifer in west-central Florida generally contain highly mineralized water. The water-bearing units containing fresh water are herein referred to as the Upper Floridan aquifer....
