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Seismic Slip Distribution along the San Jacinto Fault Zone, Southern California, and Its Implications

Thatcher, Wayne and Hileman, James A. and Hanks, Thomas C. (1975) Seismic Slip Distribution along the San Jacinto Fault Zone, Southern California, and Its Implications. Geological Society of America Bulletin, 86 (8). pp. 1140-1146. ISSN 0016-7606. https://resolver.caltech.edu/CaltechAUTHORS:20190911-095913842

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Abstract

The amount and distribution of seismic slip along 240 km of the San Jacinto fault zone between Cajon Pass and Superstition Mountain has been obtained from determinations of seismic moment and estimates of source dimension for each of the nine moderate earthquakes (6 < M < 7) which have occurred there since 1890. There are two significant gaps in seismic slip, one between Cajon Pass and Riverside, the other from Anza to Coyote Mountain. Each is about 40 km long and both are characterized by complex fault zones and a currently high level of minor seismicity (M < 5). No aseismic fault creep has been identified on either segment. These gaps may mark the sites of the next moderate earthquakes (M = 6 → 7) to occur along the San Jacinto fault zone. The two remaining sections of the fault, Riverside and Anza, and Coyote Mountain to Superstition Mountain, may have been ruptured along their entire lengths, in 1890–1923 and 1942–1968, respectively.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1130/0016-7606(1975)86%3C1140:SSDATS%3E2.0.CO;2DOIArticle
Additional Information:© 1975 Geological Society of America. Manuscript received by the Society July 4, 1974; Revised manuscript received February 18, 1975; Manuscript accepted March 7, 1975. Doc. no. 50814. The staff of the Seismographic Station of the University of California at Berkeley, particularly T. V. McEvilly, are thanked for their assistance in providing access to the seismographic records from the Berkeley station. R. V. Sharp, D. P. Hill, and J. C. Savage provided helpful discussion. M. M. Clark's careful review considerably improved the manuscript.
Group:Seismological Laboratory
Subject Keywords:seismology, earthquake moment, seismic slip, seismic gaps, earthquake prediction
Issue or Number:8
Record Number:CaltechAUTHORS:20190911-095913842
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190911-095913842
Official Citation:WAYNE THATCHER, JAMES A. HILEMAN, THOMAS C. HANKS; Seismic Slip Distribution along the San Jacinto Fault Zone, Southern California, and Its Implications. GSA Bulletin ; 86 (8): 1140–1146. doi: https://doi.org/10.1130/0016-7606(1975)86<1140:SSDATS>2.0.CO;2
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98573
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:11 Sep 2019 17:48
Last Modified:03 Oct 2019 21:42

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