Publications
Filter Total Items: 2585
Deformation across the Salton Trough, California, 1973-1977
A trilateration network extending across the San Andreas, San Jacinto, and Elsinore faults in the vicinity of the Salton Sea, California, has been surveyed to very high precision several times in the 5‐year interval 1973–1977. The average strain across the entire network is essentially a uniaxial north‐south contraction at the rate of about 0.3 μstrain/a. There is no substantial strain perpendicul
Authors
James C. Savage, W. H. Prescott, Michael Lisowski, N. King
Strain accumulation rates in the western United States between 1970 and 1978
The rate of dilatation and the rate and direction of shear have been determined from trilateration data for 23 Geodolite networks in the western United States. Sixteen nets are located along the San Andreas fault system between Point Reyes, California, and the United States‐Mexico border. Other locations are across the Garlock fault in California; across Puget Sound near Seattle, Washington; near
Authors
W. H. Prescott, James C. Savage, W. T. Kinoshita
Geodimeter measurements of strain during the Southern California Uplift
A review of geodimeter measurements made along the ‘big‐bend’ section of the San Andreas fault in southern California indicates no significant increment in strain during the period of major uplift (late 1959 to mid‐1963). Specifically, no evidence of an increment in compressional strain normal to the San Andreas fault at the time of the uplift was found. Geodolite measurements at four networks alo
Authors
James C. Savage, W. H. Prescott
Results of a reconnaissance microearthquake survey of Bucaramanga, Colombia
Six University of Wisconsin portable, continuously‐recording seismographs were operated for 3½ days in late 1976 in the Eastern Cordillera of Colombia in a 200‐km‐diameter array around Bucaramanga, where there are also three permanent stations of the Instituto Geofísico de Los Andes Colombianos. Twenty‐seven microearthquakes were recorded. Most can be well located. Only one event, located along th
Authors
W.D. Pennington, Walter D. Mooney, René van Hissenhoven, H. Meyer, J.E. Ramirez, Robert P. Meyer
Preliminary summary of the U.S. Geological Survey strong-motion records from the October 15, 1979 Imperial Valley earthquake
This report summarizes the data from near-in strong-motion accelerograph stations operated by the U.S. Geological Survey in the Imperial Valley of California at the time of the October 15, 1979 Imperial Valley earthquake. The purpose of this report is to alert others as to the nature of the strong-motion data that is available from this event. In order to provide the information in a timely manner
Authors
R. L. Porcella, R.B. Matthiesen
Compilation of strong-motion records from the August 6, 1979 Coyote Lake earthquake
This report represents a joint effort by the OSMS, CDMG and the U.S. Geological Survey (USGS). The report summarizes all strong-motion accelerograph records recovered from the August 6, 1979 Coyote Lake earthquake. The majority of accelerograms were recorded at stations operated by the OSMS-CDMG and USGS; the latter organization operates a network of instruments that belong to various federal agen
Authors
R. L. Porcella, R.B. Matthiesen, R.D. McJunkin, J.T. Ragsdale
Leveling data; Eglington fault scarp, Las Vegas Valley, Nevada
No abstract available.
Authors
Thomas L. Holzer
A single-degree-of-freedom model for non-linear soil amplification
For proper understanding of soil behavior during earthquakes and assessment of a realistic surface motion, studies of the large-strain dynamic response of non-linear hysteretic soil systems are indispensable. Most of the presently available studies are based on the assumption that the response of a soil deposit is mainly due to the upward propagation of horizontally polarized shear waves from the
Authors
Mustafa Ozder Erdik
Interim report on the St. Elias, Alaska earthquake of 28 February 1979
On 28 February 1979 an earthquake with surface wave magnitude (Ms) of 7.7 (W. Person, personal communication, 1979) occurred beneath the Chugach and St. Elias mountains of southern Alaska (fig. 1). This is a region of complex tectonics resulting from northwestward convergence between the Pacific and North American plates. To the east, the northwest-trending Fairweather fault accommodates the movem
Authors
John C. Lahr, George Plafker, C.D. Stephens, K. A. Foglean, M. E. Blackford
Progress on ground motion predictions for the San Francisco Bay region, California
No abstract available.
Authors
Roger D. Borcherdt, J. F. Gibbs, T. E. Fumal
Progress on seismic zonation in the San Francisco Bay region: Introduction and summary
No abstract available.
Authors
Earl E. Brabb, Roger D. Borcherdt