Publications
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Simulation of scenario earthquake influenced field by using GIS
The method for estimating the site effect on ground motion specified by Borcherdt (1994a, 1994b) is briefly introduced in the paper. This method and the detail geological data and site classification data in San Francisco bay area of California, the United States, are applied to simulate the influenced field of scenario earthquake by GIS technology, and the software for simulating has been drawn u
Authors
H.-Q. Zuo, L.-L. Xie, R. D. Borcherdt
Development of a technically consistent, qualified lithostratigraphic data base for the Yucca Mountain Project
Studies of Yucca Mountain, Nevada, as a potential geologic nuclear-waste repository began in the late 1970s and continued to 1988 when the U. S. Nuclear Regulatory Commission determined that the quality assurance (QA) programs in place were not adequate and demanded restructuring to a new QA program. The new QA program was accepted in 1989, but many activities did not resume until new procedures w
Authors
David C. Buesch, R.W. Spengler, M.S. Witkowski, S.M. Keller
Deformation following the 1994 Northridge Earthquake (M=6.7), Southern California
Following the 1994 Mw=6.7 Northridge earthquake, a 65‐km‐long, north‐south array of 11 geodetic monuments was established across the rupture. The array was surveyed with GPS ten times in the 4.25 yr after the earthquake. Although there is evidence for modest nonlinear postseismic relaxation in the first few weeks after the Northridge earthquake, the deformation in the subsequent four years can be
Authors
James C. Savage, Jerry L. Svarc, W. H. Prescott, Kenneth W. Hudnut
Deformation across the rupture zone of the 1964 Alaska earthquake, 1993–1997
A linear array of 15 geodetic monuments was installed in 1993 across the rupture zone of the 1964 Alaska earthquake (Mw = 9.2). The array extends from Middleton Island (at the edge of the continental shelf and 80 km from the Alaska‐Aleutian trench) to north of Palmer, Alaska (380 km from the trench), in the approximate direction of Pacific‐North American plate convergence (N15.5°W). The array was
Authors
James C. Savage, Jerry L. Svarc, W. H. Prescott, W.K. Gross
Weakness of the lower continental crust: A condition for delamination, uplift, and escape
We discuss three interconnected processes that occur during continental compression and extension: delamination of the lower crust and sub-crustal lithosphere, escape tectonics (i.e., lateral crustal flow), and crustal uplift. We combine calculations of lithospheric viscosity–depth curves with geologic observations and seismic images of the deep crust to infer the mechanisms controlling these proc
Authors
R. Meissner, Walter D. Mooney
Migration of fluids beneath Yellowstone caldera inferred from satellite radar interferometry
Satellite interferometric synthetic aperture radar is uniquely suited to monitoring year-to-year deformation of the entire Yellowstone caldera (about 3000 square kilometers). Sequential interferograms indicate that subsidence within the caldera migrated from one resurgent dome to the other between August 1992 and August 1995. Between August 1995 and September 1996, the caldera region near the nort
Authors
Charles W. Wicks, Wayne R. Thatcher, Daniel Dzurisin
Suppression of large earthquakes by stress shadows: A comparison of Coulomb and rate-and-state failure
Stress shadows generated by California's two most recent great earthquakes (1857 Fort Tejon and 1906 San Francisco) substantially modified 19th and 20th century earthquake history in the Los Angeles basin and in the San Francisco Bay area. Simple Coulomb failure calculations, which assume that earthquakes can be modeled as static dislocations in an elastic half-space, have done quite well at appro
Authors
Ruth A. Harris, Robert W. Simpson
Compilation of 29 sonic and density logs from 23 oil test wells in western Washington State
Three-dimensional velocity models for Puget Sound provide a means for better understanding the lateral variations in strong ground motions recorded during local earthquakes in Puget Lowland. We have compiled 29 sonic and density logs from 23 oil test wells to help us determine the geometry and physical properties of the Cenozoic basins in western Washington. The maximum depths sampled by the test
Authors
Thomas M. Brocher, April L. Ruebel
A vision for the future of strong-motion recording
No abstract available.
Authors
Roger D. Borcherdt
The coseismic slip distributions of the 1940 and 1979 Imperial Valley, California, earthquakes and their implications
Geodetic arrays observed by the U.S. Coast and Geodetic Survey span the Imperial fault in southern California. For the 1940 M 7.1 Imperial Valley earthquake, a 1934–1941 triangulation network has sufficient resolution to allow inversion for the coseismic slip distribution on fault segments 5 to 25 km long extending from the surface to a depth of 9 km. The estimated right-lateral slip is 0.8 to 1.7
Authors
Nancy E. King, Wayne R. Thatcher
Seismic profiling constraints on the evolution of the central Brooks Range, Arctic Alaska
No abstract available.
Authors
E. S. Wissinger, A. R. Levander, J. S. Oldow, Gary S. Fuis, W. J. Lutter