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Precise estimation of repeating earthquake moment: Example from parkfield, california

Bulletin of the Seismological Society of America

By:
and
DOI: 10.1785/0120100007

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Abstract

We offer a new method for estimating the relative size of repeating earthquakes using the singular value decomposition (SVD). This method takes advantage of the highly coherent waveforms of repeating earthquakes and arrives at far more precise and accurate descriptions of earthquake size than standard catalog techniques allow. We demonstrate that uncertainty in relative moment estimates is reduced from ??75% for standard coda-duration techniques employed by the network to an uncertainty of ??6.6% when the SVD method is used. This implies that a single-station estimate of moment using the SVD method has far less uncertainty than the whole-network estimates of moment based on coda duration. The SVD method offers a significant improvement in our ability to describe the size of repeating earthquakes and thus an opportunity to better understand how they accommodate slip as a function of time.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Precise estimation of repeating earthquake moment: Example from parkfield, california
Series title:
Bulletin of the Seismological Society of America
DOI:
10.1785/0120100007
Volume
100
Issue:
5 A
Year Published:
2010
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Bulletin of the Seismological Society of America
First page:
1952
Last page:
1961
Number of Pages:
10