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Fault Interactions and Large Complex Earthquakes in the Los Angeles Area

Science

By:
, , and
DOI: 10.1126/science.1090747

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Abstract

Faults in complex tectonic environments interact in various ways, including triggered rupture of one fault by another, that may increase seismic hazard in the surrounding region. We model static and dynamic fault interactions between the strike-slip and thrust fault systems in southern California. We find that rupture of the Sierra Madre-Cucamonga thrust fault system is unlikely to trigger rupture of the San Andreas or San Jacinto strike-slip faults. However, a large northern San Jacinto fault earthquake could trigger a cascading rupture of the Sierra Madre-Cucamonga system, potentially causing a moment magnitude 7.5 to 7.8 earthquake on the edge of the Los Angeles metropolitan region.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Fault Interactions and Large Complex Earthquakes in the Los Angeles Area
Series title:
Science
DOI:
10.1126/science.1090747
Volume
302
Issue:
5652
Year Published:
2003
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Science
First page:
1946
Last page:
1949