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The source parameters of the San Fernando earthquake inferred from teleseismic body waves

Wyss, Max and Hanks, Thomas C. (1972) The source parameters of the San Fernando earthquake inferred from teleseismic body waves. Bulletin of the Seismological Society of America, 62 (2). pp. 591-602. ISSN 0037-1106.

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The accuracy of teleseismic estimates of moment, fault area, dislocation and stress drop was tested for the case of a thrust fault: the San Fernando, California, earthquake of February 9, 1971. On the basis of P-wave spectra of 25 stations and S-wave spectra of 9 stations, the respective values were found to be 0.7 · 10^(26) dyne-cm, 570 km^2, 45 cm, and 14 bars. They agree well with the same parameters obtained from field observations. It is concluded that Brune's (1970) seismic source model is valid for the area determination of thrust earthquakes. The energy radiated in the form of S wave is estimated to be 5 · 10^(21) ergs.

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Additional Information:Copyright © 1972, by the Seismological Society of America. Manuscript received July 14, 1971. We thank Mr. Modgling of the Environmental Data Service, NOAA for furnishing the data from the WWSSN speedily, and we wish to thank Miss C. Schreiber for digitizing the records. We also are grateful to J. Savage, K. Jacob, and M. Trifunac for reading the manuscript critically and making many helpful suggestions. This study was supported by USGS Contract No. 14-08-0001-12289, and National Science Foundation Grant NSF GA-29920.
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Caltech Division of Geological and Planetary Sciences2064
Lamont-Doherty Geological Observatory1753
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ID Code:48457
Deposited By: George Porter
Deposited On:13 Aug 2014 13:56
Last Modified:03 Oct 2019 07:04

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