Publications
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Strain accumulation along the Denali Fault at the Nenana River and Delta River Crossings, Alaska
Surveys of trilateration networks across the Denali fault at the Nenana River in 1982, 1984, and 1988 and at the Delta River in 1975, 1979, 1982, and 1984 indicate a minor (0.10±0.04 μstrain/yr) northeastward uniaxial extension. The component of right‐lateral shear‐strain accumulation across the fault is not significant at the two‐standard‐deviation level. At the Delta River network the strain acc
Authors
James C. Savage, Michael Lisowski
The Loma Prieta earthquake, ground motion, and damage in Oakland, Treasure Island, and San Francisco
The basis of this study is the acceleration, velocity, and displacement wave-forms of the Loma Prieta earthquake (18 October 1989; M = 7.0) at two rock sites in San Francisco, a rock site on Yerba Buena Island, an artificial-fill site on Treasure Island, and three sites in Oakland underlain by thick sections of poorly consolidated Pleistocene sediments. The waveforms at the three rock sites displa
Authors
Thomas C. Hanks, A. Gerald Brady
Methodology for predictive GIS mapping of special study zones for strong ground shaking in the San Francisco Bay region, California
No abstract available.
Authors
Roger D. Borcherdt, Carl M. Wentworth, A. Janssen, T. Fumal, J. Gibbs
Application of GIS technology to seismic zonation of the San Francisco Bay region, California
No abstract available.
Authors
Carl M. Wentworth, Roger D. Borcherdt, T.T. Fitzgibbon, P. K. Showalter
Comparative observation of soil amplification from long-period micro tremor and earthquake recordings for seismic microzonation
No abstract available.
Authors
Hiroyuki Kameda, Mehmet Çelebi, Roger D. Borcherdt, Junpei Akamatsu, M. Fujita
Archean and Proterozoic crustal evolution: Evidence from crustal seismology
Seismic-velocity models for Archean and Proterozoic provinces throughout the world are analyzed. The thickness of the crust in Archean provinces is generally found to be about 35 km (except at collisional boundaries), whereas Proterozoic crust has a significantly greater thickness of about 45 km and has a substantially thicker high-velocity (>7.0 km/s) layer at the base. We consider two models tha
Authors
R. Durrheim, Walter D. Mooney
Basin and range crustal and upper mantle structure, northwest to central Nevada
We present an interpretation of the crustal and uppermost mantle structure of the Basin and Range of northwestern Nevada based on seismic refraction/wide‐angle reflection, near‐vertical reflection, and gravity data. In comparison to most previous estimates, we find that the crust is somewhat thicker (32–36 km versus 22–30 km), and the uppermost mantle velocity is somewhat higher (8.0 km/s versus 7
Authors
Rufus D. Catchings, Walter D. Mooney
Probing the Earth's strength: Can we measure small stress at high pressure?
Simulating the conditions and processes that occur in the Earth's deep interior has been a major goal of experimental geophysics since the 1920s. In particular, pioneers such as P. W. Bridgman, David Griggs, Hugh Heard, Mervyn Paterson, William Brace, and their colleagues sought to establish the basic relations between differential stresses and rock and mineral deformation under pressure-temperatu
Authors
A. Kronenberg, Stephen H. Kirby
Sonobuoy seismic studies at ODP drill sites in Prydz Bay, Antarctica
Five sonobuoy seismic-refraction records were collected along the Leg 119 geophysical transect across the Prydz Bay shelf. Velocity-depth profiles are computed from the sonobuoy data and are used to produce a depth section for the principal acoustic unit boundaries observed in the seismic-reflection data along the transect. Traveltime curves generated by ray-tracing for models constructed from dow
Authors
Guy R. Cochrane, Alan K. Cooper
Seismic stratigraphy and structure of Prydz Bay, Antarctica: Implications from Leg 119 drilling
Prydz Bay is situated on the MacRobertson Land coast of East Antarctica at the seaward end of a 700-km-long transverse rift zone, the Lambert Rift. New and reprocessed seismic reflection data are combined with drilling results from five Leg 119 sites across Prydz Bay to study the regional stratigraphy and structure of the continental shelf and upper slope. Severe seismic multiples hamper interpret
Authors
Alan K. Cooper, Howard Stagg, Eric L. Geist
Quaternary history of some southern and central Rocky Mountain basins
This chapter summarizes the current state of late Cenozoic stratigraphic knowledge in some Rocky Mountain basins (here defined as the structurally low portions of major drainage basins) that have been studied in detail since Scott’s (1965) summary on the nonglacial history of the southern and middle Rocky Mountains. The Quaternary history of few of these basins has been studied as intensively as t
Authors
Marith C. Reheis, Robert C. Palmquist, S.S. Agard, Cheryl Jaworowski, Brainerd Mears, Richard F. Madole, Alan R. Nelson, Gerald Osborn
Channel hydraulics and energy expenditure in channel adjustment; Elk Rock Reach, North Fork Toutle River, Washington
No abstract available.
Authors
Andrew Simon