Publications
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Seismic hazard in Hawaii: High rate of large earthquakes and probabilistics ground-motion maps Seismic hazard in Hawaii: High rate of large earthquakes and probabilistics ground-motion maps
The seismic hazard and earthquake occurrence rates in Hawaii are locally as high as that near the most hazardous faults elsewhere in the United States. We have generated maps of peak ground acceleration (PGA) and spectral acceleration (SA) (at 0.2, 0.3 and 1.0 sec, 5% critical damping) at 2% and 10% exceedance probabilities in 50 years. The highest hazard is on the south side of Hawaii...
Authors
F. W. Klein, A.D. Frankel, C.S. Mueller, R. L. Wesson, P. G. Okubo
Influence of surface-normal ground acceleration on the initiation of the Jih-Feng-Erh-Shan landslide during the 1999 Chi-Chi, Taiwan, earthquake Influence of surface-normal ground acceleration on the initiation of the Jih-Feng-Erh-Shan landslide during the 1999 Chi-Chi, Taiwan, earthquake
The 1999 Chi-Chi, Taiwan, earthquake triggered numerous landslides throughout a large area in the Central Range, to the east, southeast, and south of the fault rupture. Among them are two large rock avalanches, at Tsaoling and at Jih-Feng-Erh-Shan. At Jih-Feng-Erh-Shan, the entire thickness (30-50 m) of the Miocene Changhukeng Shale over an area of 1 km2 slid down its bedding plane for a...
Authors
C.-C. Huang, Y.-H. Lee, Huaibao P. Liu, D. K. Keefer, R.W. Jibson
Abstracts of the Annual planetary geologic mappers meeting; June 22-24, 2000, Flagstaff, Arizona Abstracts of the Annual planetary geologic mappers meeting; June 22-24, 2000, Flagstaff, Arizona
No abstract available.
Authors
Kenneth L. Tanaka, Derrick D. Hirsch
Landslides induced by Hurricane Mitch in El Salvador -- an inventory and descriptions of selected features Landslides induced by Hurricane Mitch in El Salvador -- an inventory and descriptions of selected features
No abstract available.
Authors
Anthony J. Crone, Rex L. Baum, David J. Lidke, Damon Sather, Lee-Ann Bradley, Arthur C. Tarr
Mountain Meadows Dacite: Oligocene intrusive complex that welds together the Los Angeles Basin, northwestern Peninsular Ranges, and central Transverse Ranges, California Mountain Meadows Dacite: Oligocene intrusive complex that welds together the Los Angeles Basin, northwestern Peninsular Ranges, and central Transverse Ranges, California
Dikes and irregular intrusive bodies of distinctive Oligocene biotite dacite and serially related hornblende latite and felsite occur widely in the central and eastern San Gabriel Mountains, southern California, and are related to the Telegraph Peak granodiorite pluton. Identical dacite is locally present beneath Middle Miocene Topanga Group Glendora Volcanics at the northeastern edge of...
Authors
Thane H. McCulloh, Larry A. Beyer, Ronald W. Morin
A preliminary finite-element analysis of a shallow landslide in the Alki area of Seattle, Washington A preliminary finite-element analysis of a shallow landslide in the Alki area of Seattle, Washington
No abstract available.
Authors
S. Debray, W. Z. Savage
Density and velocity relationships for digital sonic and density logs from coastal Washington and laboratory measurements of Olympic Peninsula mafic rocks and greywackes Density and velocity relationships for digital sonic and density logs from coastal Washington and laboratory measurements of Olympic Peninsula mafic rocks and greywackes
Three-dimensional velocity models for the basins along the coast of Washington and in Puget Lowland provide a means for better understanding the lateral variations in strong ground motions recorded there. We have compiled 16 sonic and 18 density logs from 22 oil test wells to help us determine the geometry and physical properties of the Cenozoic basins along coastal Washington. The depth...
Authors
Thomas M. Brocher, Nikolas I. Christensen
hypoDD-A Program to Compute Double-Difference Hypocenter Locations hypoDD-A Program to Compute Double-Difference Hypocenter Locations
HypoDD is a Fortran computer program package for relocating earthquakes with the double-difference algorithm of Waldhauser and Ellsworth (2000). This document provides a brief introduction into how to run and use the programs ph2dt and hypoDD to compute double-difference (DD) hypocenter locations. It gives a short overview of the DD technique, discusses the data preprocessing using ph2dt...
Authors
Felix Waldhauser
Preliminary geological assessment of the Northern edge of Ultimi Lobe, Mars South Polar layered deposits Preliminary geological assessment of the Northern edge of Ultimi Lobe, Mars South Polar layered deposits
We have examined the local base of the south polar layered deposits (SPLD) exposed in the bounding scarp near 72°–74°S, 215°–230°W where there is a clear unconformable contact with older units. Sections of layering up to a kilometer thick were examined along the bounding scarp, permitting an estimate of the thinnest individual layers yet reported in the SPLD. Rhythmic layering is also...
Authors
B. Murray, M. Koutnik, S. Byrne, Laurence A. Soderblom, Kenneth E. Herkenhoff, K. L. Tanaka
Respuesta a los desprendimientos de tierra ocasionados por las lluvias torrenciales del Huracan Mitch en siete areas de estudio de Nicaragua [Landslide response to Hurricane Mitch rainfall in seven study areas in Nicaragua] Respuesta a los desprendimientos de tierra ocasionados por las lluvias torrenciales del Huracan Mitch en siete areas de estudio de Nicaragua [Landslide response to Hurricane Mitch rainfall in seven study areas in Nicaragua]
No abstract available.
Authors
Susan H. Cannon, Kathleen M. Haller, Ingrid Ekstrom, Eugene S. Schweig, Graziella Devoli, David W. Moore, Sharon A. Rafferty, Arthur C. Tarr
Borehole, surface geologic, and geotechnical data for the Aspen Grove landslide, Sanpete County, Utah Borehole, surface geologic, and geotechnical data for the Aspen Grove landslide, Sanpete County, Utah
No abstract available.
Authors
Rex L. Baum, Robert W. Fleming
Report for borehole explosion data acquired in the 1999 Los Angeles Region Seismic Experiment (LARSE II), Southern California: Part I, description of the survey Report for borehole explosion data acquired in the 1999 Los Angeles Region Seismic Experiment (LARSE II), Southern California: Part I, description of the survey
The Los Angeles Region Seismic Experiment (LARSE) is a joint project of the U.S. Geological Survey (USGS) and the Southern California Earthquake Center (SCEC). The purpose of this project is to produce seismic images of the subsurface of the Los Angeles region down to the depths at which earthquakes occur, and deeper, in order to remedy a deficit in our knowledge of the deep structure of...
Authors
Gary S. Fuis, Janice M. Murphy, David A. Okaya, Robert W. Clayton, Paul M. Davis, Kristina Thygesen, Shirley A. Baher, Trond Ryberg, Mark L. Benthien, Gerry Simila, J. Taylor Perron, Alan K. Yong, Luke Reusser, William J. Lutter, Galen Kaip, Michael D. Fort, Isa Asudeh, Russell Sell, John R. Van Schaack, Edward E. Criley, Ronald Kaderabek, Will M. Kohler, Nickolas H. Magnuski