Statistics – Computation
Scientific paper
Aug 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3615303w&link_type=abstract
Geophysical Research Letters, Volume 36, Issue 15, CiteID L15303
Statistics
Computation
1
Seismology: Earthquake Dynamics (1242), Seismology: Subduction Zones (1207, 1219, 1240), Seismology: Computational Seismology, Oceanography: Physical: Tsunamis And Storm Surges, Tectonophysics: Subduction Zone Processes (1031, 3060, 3613, 8413)
Scientific paper
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 the 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 than in the homogeneous case. The results have implications for the dynamics of megathrust earthquakes, and also suggest that dynamic earthquake modeling may be a useful tool in tsunami research.
Geist Eric L.
Oglesby David D.
Wendt James
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