A hypothesis for delayed dynamic earthquake triggering
Geophysical Research Letters
By: T. Parsons
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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.
| 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 |
| Google Analytic Metrics | Metrics page |