Tsunamis and splay fault dynamics
Geophysical Research Letters
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Abstract
The geometry of a fault system can have significant effects on tsunami generation, but most tsunami models to date have not investigated the dynamic processes that determine which path rupture will take in a complex fault system. To gain insight into this problem, we use the 3D finite element method to model the dynamics of a plate boundary/splay fault system. We use the resulting ground deformation as a time-dependent boundary condition for a 2D shallow-water hydrodynamic tsunami calculation. We find that if me stress distribution is homogeneous, rupture remains on the plate boundary thrust. When a barrier is introduced along the strike of the plate boundary thrust, rupture propagates to the splay faults, and produces a significantly larger tsunami man in the homogeneous case. The results have implications for the dynamics of megathrust earthquakes, and also suggest mat dynamic earthquake modeling may be a useful tool in tsunami researcn. Copyright 2009 by the American Geophysical Union.
Suggested Citation
Wendt, J., Oglesby, D., and Geist, E., 2009, Tsunamis and splay fault dynamics: Geophysical Research Letters, v. 36, no. 15, https://doi.org/10.1029/2009GL038295.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Tsunamis and splay fault dynamics |
| Series title | Geophysical Research Letters |
| DOI | 10.1029/2009GL038295 |
| Volume | 36 |
| Issue | 15 |
| Publication Date | August 04, 2009 |
| Year Published | 2009 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Geophysical Research Letters |