HR: 09:15h
AN: S51F-05    [Abstracts]
TI: Initiation propagation and termination of elastodynamic ruptures associated with segmentation of faults and shaking hazard
AU: * Shaw, B E
EM: shaw@ldeo.columbia.edu
AF: Lamont Doherty Earth Observatory, Columbia University, Palisades, NY 10964 United States
AB: Using a model of a complex fault system, we examine the initiation, propagation, and termination of ruptures, and their relationship to fault geometry and shaking hazard. We find concentrations of epicenters near fault stepovers and ends; concentrations of terminations near fault ends; and persistent propagation directivity effects. Taking advantage of long sequences of dynamic events, we directly measure shaking hazards, such as peak ground acceleration exceedence probabilities, without need for additional assumptions. We find some significant aspects of the shaking hazard can be anticipated by measures of the epicenters.
DE: 7209 Earthquake dynamics (1242)
DE: 7212 Earthquake ground motions and engineering seismology
DE: 7230 Seismicity and tectonics (1207, 1217, 1240, 1242)
DE: 8010 Fractures and faults
DE: 8118 Dynamics and mechanics of faulting (8004)
SC: Seismology [S]
MN: Fall Meeting 2005