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The spatio-temporal variation of seismicity before the 1971 San Fernando Earthquake, California

Ishida, Mizuho and Kanamori, Hiroo (1977) The spatio-temporal variation of seismicity before the 1971 San Fernando Earthquake, California. Geophysical Research Letters, 4 (8). pp. 345-346. ISSN 0094-8276. http://resolver.caltech.edu/CaltechAUTHORS:20141111-142850276

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Abstract

The spatio-temporal variation of seismicity prior to the 1971 San Fernando, California, earthquake is studied for the area within 35 km of the epicenter. During the period from 1932 to 1961, the seismicity in this area was relatively low and random. A remarkable NE-SW trending alignment of activity occurred during the period from 1961 to 1964, the period corresponding to the inferred onset of the Palmdale uplift. During the period from 1965 to 1968, the seismicity around the epicentral area became extremely low; no event was located within 13 km from the epicenter. During the period from 1969 to the occurrence of the San Fernando earthquake, activity around the epicentral area increased. This activity may be considered to be foreshock activity in a broad sense.


Item Type:Article
Related URLs:
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http://dx.doi.org/10.1029/GL004i008p00345DOIArticle
http://onlinelibrary.wiley.com/doi/10.1029/GL004i008p00345/abstractPublisherArticle
Additional Information:Copyright 1977 by the American Geophysical Union. (Received June 1, 1977; accepted June 20, 1977.) Paper number 7L0561. We thank Robert Geller and Seth Stein for reading the manuscript and making useful comments for improvements. Mizuho Ishida was supported by a fellowship from the Science and Technology Agency of Japan. This research was sponsored by U.S. Geological Survey Contract No. 14-08-0001-15893. Contribution No. 2912, Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California 91125.
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Science and Technology Agency of JapanUNSPECIFIED
USGS14-08-0001-15893
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Caltech Division of Geological and Planetary Sciences2912
Record Number:CaltechAUTHORS:20141111-142850276
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20141111-142850276
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:51598
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:11 Nov 2014 22:40
Last Modified:13 Feb 2019 18:06

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