Publications
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Three-dimensional velocity structure of crust and upper mantle in southwestern China and its tectonic implications
Using P and S arrival times from 4625 local and regional earthquakes recorded at 174 seismic stations and associated geophysical investigations, this paper presents a three‐dimensional crustal and upper mantle velocity structure of southwestern China (21°–34°N, 97°–105°E). Southwestern China lies in the transition zone between the uplifted Tibetan plateau to the west and the Yangtze continental pl
Authors
Chun-Yong Wang, W.W. Chan, Walter D. Mooney
Comments on potential geologic and seismic hazards affecting Mare Island, Solano County, California
This report was prepared in response to a written request from the City of Vallejo, California, to the U.S. Geological Survey (USGS). By letter of October 4, 2002, the City requested that the USGS "provide advice to the City’s LNG Health and Safety Committee on its review of a potential liquid natural gas project" on the southern portion of Mare Island. The City specifically requested that the USG
Authors
T.L. Holzer, C. M. Wentworth, W. H. Bakun, J. Boatwright, T.E. Brocher, M. Çelebi, W.L. Ellsworth, J.P.B. Fletcher, E.L. Geist, R. W. Graymer, R. E. Kayen, D. K. Keefer, D. H. Oppenheimer, W.U. Savage, D. P. Schwartz, R. W. Simpson
Earthquake-volcano interactions
No abstract available.
Authors
David P. Hill, Fred Pollitz, Christopher Newhall
Felt reports and intensity assignments for aftershocks and triggered events of the great 1906 California earthquake
The San Andreas fault is the longest fault in California and one of the longest strikeslip faults in the world, yet little is known about the aftershocks following the most recent great event on the San Andreas, the M 7.8 San Francisco earthquake, on 18 April 1906. This open-file report is a compilation of first-hand accounts (felt reports) describing aftershocks and triggered events of the 1906 e
Authors
Aron J. Meltzner, David J. Wald
Catalog of earthquake hypocenters at Alaskan volcanoes: January 1, 2000 through December 31, 2001
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 potentially active volcanoes in Alaska since 1988 (Power and others, 1993; Jolly and others, 1996; Jolly and others, 2001). The primary
Authors
James P. Dixon, Scott D. Stihler, John A. Power, Guy Tytgat, Steve Estes, Seth C. Moran, John Paskievitch, Stephen R. McNutt
Evidence from the AD 2000 Izu islands earthquake swarm that stressing rate governs seismicity
Magma intrusions and eruptions commonly produce abrupt changes in seismicity far from magma conduits1,2,3,4 that cannot be associated with the diffusion of pore fluids or heat5. Such ‘swarm’ seismicity also migrates with time, and often exhibits a ‘dog-bone’-shaped distribution3,4,6,7,8,9. The largest earthquakes in swarms produce aftershocks that obey an Omori-type (exponential) temporal decay10,
Authors
Shingi Toda, Ross S. Stein, Takeshi Sagiya
Report for borehole explosion data acquired in the 1999 Los Angeles Region Seismic Experiment (LARSE II), southern California: Part II, data tables and plots
The Los Angeles Region Seismic Experiment (LARSE), a joint project of the U.S. Geological Survey (USGS) and the Southern California Earthquake Center (SCEC), was conducted to produce seismic images of the subsurface in the Los Angeles region. Primary targets were major fault systems and sedimentary basins; the goal of the project was to address the earthquake hazard posed by these geologic feature
Authors
Janice M. Murphy, Gary S. Fuis, D. A. Okaya, Kristina Thygesen, Shirley A. Baher, Trond Rybert, Galen Kaip, Michael D. Fort, Isa Asudeh, Russell Sell
Data from theodolite measurements of creep rates on San Francisco Bay region faults, California: 1979-2001
My purpose is to make our creep data on San Francisco Bay region active faults available to the scientific research community. My student research assistants and I measured creep (aseismic slip) rates on these faults from 1979 until my retirement from the project in 2001. These data are further described in my final technical report as principal investigator, which summarizes results from 22 Septe
Authors
Jon S. Galehouse
Borehole velocity measurements at five sites that recorded the Cape Mendocino, California earthquake of 25 April, 1992
The U.S. Geological Survey (USGS), as part of an ongoing program to acquire seismic velocity and geologic data at locations that recorded strong-ground motions during earthquakes, has investigated five sites in the Fortuna, California region (Figure 1). We selected drill sites at strong-motion stations that recorded high accelerations (Table 1) from the Cape Mendocino earthquake (M 7.0) of 25 Apri
Authors
James F. Gibbs, John C. Tinsley, David M. Boore
User's guide to HYPOINVERSE-2000, a Fortran program to solve for earthquake locations and magnitudes
Hypoinverse is a computer program that processes files of seismic station data for an earthquake (like p wave arrival times and seismogram amplitudes and durations) into earthquake locations and magnitudes. It is one of a long line of similar USGS programs including HYPOLAYR (Eaton, 1969), HYPO71 (Lee and Lahr, 1972), and HYPOELLIPSE (Lahr, 1980).
If you are new to Hypoinverse, you may want to st
Authors
Fred W. Klein
Crustal structure across the Bering Strait, Alaska: Onshore recordings of a marine seismic survey
No abstract available.
Authors
Lorraine W. Wolf, Robert C. McCaleb, David B. Stone, Thomas M. Brocher, Kazuya Fujita, Simon L. Klemperer
Constraints on the age of formation of seismically reflective middle and lower crust beneath the Bering Shelf: SHRIMP zircon dating of xenoliths from Saint Lawrence Island
No abstract available.
Authors
Elizabeth L. Miller, T. R. Ireland, Simon L. Klemperer, Karl Wirth, Vyacheslav V Akinin, Thomas M. Brocher