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A hypothesis for delayed dynamic earthquake triggering

Geophysical Research Letters

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DOI: 10.1029/2004GL021811

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Abstract

It's uncertain whether more near-field earthquakes are triggered by static or dynamic stress changes. This ratio matters because static earthquake interactions are increasingly incorporated into probabilistic forecasts. Recent studies were unable to demonstrate all predictions from the static-stress-change hypothesis, particularly seismicity rate reductions. However, current dynamic stress change hypotheses do not explain delayed earthquake triggering and Omori's law. Here I show numerically that if seismic waves can alter some frictional contacts in neighboring fault zones, then dynamic triggering might cause delayed triggering and an Omori-law response. The hypothesis depends on faults following a rate/state friction law, and on seismic waves changing the mean critical slip distance (Dc) at nucleation zones.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
A hypothesis for delayed dynamic earthquake triggering
Series title:
Geophysical Research Letters
DOI:
10.1029/2004GL021811
Volume
32
Issue:
4
Year Published:
2005
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geophysical Research Letters
First page:
1
Last page:
4