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Source inversion of the 1988 Upland, California, earthquake: determination of a fault plane for a small event

Bulletin of the Seismological Society of America

By:
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Abstract

We examined short-period P waves to investigate if waveform data could be used to determine which of two nodal planes was the actual fault plane for a small (ML 4,6) earthquake near Upland, California. The southwest trending fault plane consistently gave better fitting solutions than the southeast-trending plane. We determined a moment of 4.2 ?? 1022 dyne-cm. The rupture velocity, and thus the source area could not be well resolved, but if we assume a reasonable rupture velocity of 0.87 times the shear wave velocity, we obtain a source area of 0.97 km2 and a stress drop of 38 bars. -from Authors

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Source inversion of the 1988 Upland, California, earthquake: determination of a fault plane for a small event
Series title:
Bulletin of the Seismological Society of America
Volume
80
Issue:
3
Year Published:
1990
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Bulletin of the Seismological Society of America
First page:
507
Last page:
518