Publications
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Analysis of seismograms from a downhole array in sediments near San Francisco Bay Analysis of seismograms from a downhole array in sediments near San Francisco Bay
A four-level downhole array of three-component instruments was established on the southwest shore of San Francisco Bay to monitor the effect of the sediments on low-amplitude seismic ground motion. The deepest instrument is at a depth of 186 meters, two meters below the top of the Franciscan bedrock. Earthquake data from regional distances (29 km ≤ Δ ≤ 485 km) over a wide range of...
Authors
William B. Joyner, Richard E. Warrick, Adolph A. Oliver
Prediction of maximum earthquake intensities for the San Francisco Bay region Prediction of maximum earthquake intensities for the San Francisco Bay region
No abstract available.
Authors
Roger D. Borcherdt
Crustal movement investigations Crustal movement investigations
Studies of horizontal crustal movement using conventional geodetic methods have been considerably expanded in the quadrennium 1971–1974. The basic fault monitor Geodimeter network now covers most of the major faults in California as well as the zone of faulting that extends into Nevada. Isolated Geodimeter networks in seismic areas of Montana, New Mexico, Utah, and Washington are also...
Authors
James C. Savage
Mechanics of beach cusp formation Mechanics of beach cusp formation
No abstract available.
Authors
Asbury Hilliard Sallenger
A model for earthquakes near Palisades Reservoir, southeast Idaho A model for earthquakes near Palisades Reservoir, southeast Idaho
The Palisades Reservoir seems to be triggering earthquakes: epicenters are concentrated near the reservoir, and quakes are concentrated in spring, when the reservoir level is highest or is rising most rapidly, and in fall, when the level is lowest. Both spring and fall quakes appear to be triggered by minor local stresses superposed on regional tectonic stresses; faulting is postulated...
Authors
David Schleicher
The orthoenstatite to clinoenstatite transformation by shearing and reversion by annealing: Mechanism and potential applications The orthoenstatite to clinoenstatite transformation by shearing and reversion by annealing: Mechanism and potential applications
Clinoenstatite (CE) was produced by deforming single-crystal specimens of ortho-enstatite (OE) in several different sorta of experiments. Examination with light and trans-mission electron microscopes shows that the transformation is coherent and involves a macroscopic shear on (100) [001] through an angle of 12.8±1.3 °, in good agreement with the theoretically expected value of 13.3 °...
Authors
R. S. Coe, Stephen H. Kirby
Preliminary photointerpretation maps of landslide and other surficial deposits of 56 7 1/2-minute quadrangles in the southeastern San Francisco Bay region, Alameda, Contra Costa, and Santa Clara counties, California Preliminary photointerpretation maps of landslide and other surficial deposits of 56 7 1/2-minute quadrangles in the southeastern San Francisco Bay region, Alameda, Contra Costa, and Santa Clara counties, California
No abstract available.
Authors
Tor Helge Nilsen, J. A. Bartow, V. A. Frizzell, J.D. Sims
Notes on some experiments on the application of subtractive compensation to USGS seismic magnetic tape recording and playback systems Notes on some experiments on the application of subtractive compensation to USGS seismic magnetic tape recording and playback systems
The purpose of these experiments is to lay the groundwork for the implementation of subtractive compensation of the USGS seismic network tape playbacks utilizing the Develco model 6203 discriminators at a x1 playback speed. Although the Develco discriminators were designed for this application and a matching Develco compensation discriminator was purchased, effective use of this system...
Authors
Jerry P. Eaton
Reconnaissance landslide map of parts of Marin and Sonoma counties, California Reconnaissance landslide map of parts of Marin and Sonoma counties, California
No abstract available.
Authors
Carl M. Wentworth, Virgil A. Frizzell
By
Geology, Energy, and Minerals Mission Area, Natural Hazards Mission Area, Energy Resources Program, Landslide Hazards Program, Mineral Resources Program, National Laboratories Program, Science and Decisions Center, Geologic Hazards Science Center, Geology, Minerals, Energy, and Geophysics Science Center
Seismic profiles of the offshore Gulf of Alaska Tertiary Province, R/V Thompson, Sept.-Oct. 1974 Seismic profiles of the offshore Gulf of Alaska Tertiary Province, R/V Thompson, Sept.-Oct. 1974
No abstract available.
Authors
Roland E. von Huene, B. F. Molnia, T.R. Bruns, P.R. Carlson
The 1959 Hebgen Lake, Montana, earthquake: Two geological points of view The 1959 Hebgen Lake, Montana, earthquake: Two geological points of view
No abstract available.
Authors
Irving J. Witkind
Apollo 12 voice transcript pertaining to the geology of the landing site Apollo 12 voice transcript pertaining to the geology of the landing site
This document is an edited record of the conversations between the Apollo 12 astronauts and mission control pertaining to the geology of the landing site. It contains all discussions and observations documenting the lunar landscape, its geologic characteristics, the rocks and soils collected, and the lunar surface photographic record along with supplementary remarks essential to the...
Authors
N. G. Bailey, G. E. Ulrich