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.
Suggested Citation
Melgar, D., and Hayes, G.P., 2017, Systematic observations of the slip pulse properties of large earthquake ruptures: Geophysical Research Letters, v. 44, no. 19, p. 9691-9698, https://doi.org/10.1002/2017GL074916.
| 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 |
| Publication Date | October 13, 2017 |
| Year Published | 2017 |
| Language | English |
| Publisher | AGU |
| Contributing office(s) | Geologic Hazards Science Center |
| Description | 8 p. |
| First page | 9691 |
| Last page | 9698 |