Publications
Filter Total Items: 1859
Station corrections for the Katmai Region Seismic Network
Most procedures for routinely locating earthquake hypocenters within a local network are constrained to using laterally homogeneous velocity models to represent the Earth's crustal velocity structure. As a result, earthquake location errors may arise due to actual lateral variations in the Earth's velocity structure. Station corrections can be used to compensate for heterogeneous velocity structur
Authors
Cheryl K. Searcy
Consequences of viscous drag beneath a transform fault
A transform fault is modeled as a vertical cut through an elastic layer (schizosphere) of thickness overlying a viscous substrate (plastosphere). We consider a steady transform motion accommodated in the schizosphere wholly by slip on the fault and in the plastosphere, insofar as possible, by viscous flow. For the case where the viscosity in the plastosphere is strain rate dependent but independen
Authors
James C. Savage, A. H. Lachenbruch
Glossary of interest to earthquake and engineering seismologists
No abstract available.
Authors
K. Aki, William H. K. Lee
Data report for the main line of the PSINE seismic survey across the San Andreas Fault and SAFOD Site near Parkfield, California
In October and November 1998, the U.S. Geological Survey, Virginia Polytechnic
Institute, Stanford University, and Geometrics Corporation jointly acquired a highresolution
seismic reflection/refraction profile across the San Andreas Fault Zone (SAFZ)
and the proposed San-Andreas-Fault-Observatory-at-Depth (SAFOD) drill site located
near Parkfield, California (Fig. 1a). We refer to this seismic sur
Authors
R. D. Catchings, M. R. Goldman, M. J. Rymer, G. Gandhok, G. S. Fuis
Empirical modified Mercalli intensity site corrections for towns in eastern North America
Modified Mercalli intensity (MMI) assignments for earthquakes in eastern North America (ENA) were used by Bakun et al. (2003) and Bakun and Hopper (in press) to develop models for estimating the location and moment magnitude M of earthquakes in ENA from MMI observations. The MMI empirical site corrections developed and used by Bakun et al. (2003) and Bakun and Hopper (in press) are listed in this
Authors
W. H. Bakun, M. G. Hopper
Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2002
The Alaska Volcano Observatory (AVO), a cooperative program of the U.S. Geological Survey, the Geophysical Institute of the University of Alaska Fairbanks, and the Alaska Division of Geological and Geophysical Surveys, has maintained seismic monitoring networks at historically active volcanoes in Alaska since 1988 (Power and others, 1993; Jolly and others, 1996; Jolly and others, 2001; Dixon and o
Authors
James P. Dixon, Scott D. Stihler, John A. Power, Guy Tytgat, Seth C. Moran, John Sánchez, Steve Estes, Stephen R. McNutt, John Paskievitch
Geologic map and digital database of the Redlands 7.5' quadrangle, San Bernardino and Riverside Counties, California
This geologic database of the Redlands 7.5' quadrangle was prepared by the Southern California Areal Mapping Project (SCAMP), a regional geologic-mapping project sponsored jointly by the U.S. Geological Survey and the California Geological Survey. The database was developed as a contribution to the National Cooperative Geologic Mapping Program's National Geologic Map Database, and is intended to p
Authors
Jonathan C. Matti, Douglas M. Morton, Brett F. Cox, Katherine J. Kendrick, Pamela M. Cossette, Bradley Jones, Stephen A. Kennedy
By
Natural Hazards Mission Area, Energy and Minerals Mission Area, Earthquake Hazards Program, Energy Resources Program, Mineral Resources Program, National Laboratories Program, Science and Decisions Center, Groundwater and Streamflow Information Program, Earthquake Science Center, Geology, Minerals, Energy, and Geophysics Science Center
The Sidebar Computer Program, a seismic-shaking intensity meter: users' manual and software description
The SideBar computer program provides a visual display of seismic shaking intensity as recorded at one specific seismograph. This software allows a user to tap into the seismic data recorded on that specific seismograph and to display the overall level of shaking at the single location where that seismograph resides (usually the same place the user is). From this shaking level, SideBar also estima
Authors
John R. Evans
Additional information for “TREMOR: A Wireless, MEMS Accelerograph for Dense Arrays” (Evans et al., 2003)
The length of Evans et al. (2003) necessitated transfer of several less germane sections to this alternate forum to meet that venues needs. These sections include a description of the development of Figure 1, the plot of spatial variability so critical to the argument for dense arrays of strong-motion instruments; the description of the rapid, integer, computational method for PGV used in the TRE
Authors
John R. Evans, Robert H. Hamstra, Paul Spudich, Christoph Kundig, Patrick Camina, John A. Rogers
A compendium of P- and S-wave velocities from surface-to-borehole logging; summary and reanalysis of previously published data and analysis of unpublished data
For over 28 years, the U.S. Geological Survey (USGS) has been acquiring seismic velocity and geologic data at a number of locations in California, many of which were chosen because strong ground motions from earthquakes were recorded at the sites. The method for all measurements involves picking first arrivals of P- and S-waves from a surface source recorded at various depths in a borehole (as opp
Authors
David M. Boore
Wide-angle seismic recording from the 2002 Georgia Basin Geohazards Initiative, northwestern Washington and British Columbia
This report describes the acquisition and processing of shallow-crustal wide-angle seismicreflection and refraction data obtained during a collaborative study in the Georgia Strait, western Washington and southwestern British Columbia. The study, the 2002 Georgia Strait Geohazards Initiative, was conducted in May 2002 by the Pacific Geoscience Centre, the U.S. Geological Survey, and the University
Authors
Thomas M. Brocher, Thomas L. Pratt, George D. Spence, Michael Riedel, Roy D. Hyndman
The plan to coordinate NEHRP post-earthquake investigations
This is the plan to coordinate domestic and foreign post-earthquake investigations supported by the National Earthquake Hazards Reduction Program (NEHRP). The plan addresses coordination of both the NEHRP agencies—Federal Emergency Management Agency (FEMA), National Institute of Standards and Technology (NIST), National Science Foundation (NSF), and U. S. Geological Survey (USGS)—and their partner
Authors
Thomas L. Holzer, Roger D. Borcherdt, Craig D. Comartin, Robert D. Hanson, Charles R. Scawthorn, Kathleen Tierney, T. Leslie Youd