Systematic observations of the slip pulse properties of large earthquake ruptures
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Abstract
In earthquake dynamics there are two end member models of rupture: propagating cracks and self-healing pulses. These arise due to different properties of faults and have implications for seismic hazard; rupture mode controls near-field strong ground motions. Past studies favor the pulse-like mode of rupture; however, due to a variety of limitations, it has proven difficult to systematically establish their kinematic properties. Here we synthesize observations from a database of >150 rupture models of earthquakes spanning M7–M9 processed in a uniform manner and show the magnitude scaling properties of these slip pulses indicates self-similarity. Further, we find that large and very large events are statistically distinguishable relatively early (at ~15 s) in the rupture process. This suggests that with dense regional geophysical networks strong ground motions from a large rupture can be identified before their onset across the source region.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Systematic observations of the slip pulse properties of large earthquake ruptures |
| Series title | Geophysical Research Letters |
| DOI | 10.1002/2017GL074916 |
| Volume | 44 |
| Issue | 19 |
| Year Published | 2017 |
| Language | English |
| Publisher | AGU |
| Contributing office(s) | Geologic Hazards Science Center |
| Description | 8 p. |
| First page | 9691 |
| Last page | 9698 |
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