Session IV:
Simulation of earthquake repture, wave propagation and standard models for different tectonic settings

2nd ACES (APEC Cooperation for Earthquake Simulation) Workshop in Japan

Hybrid Modeling of Curved Fault Radiation in a 3D Heterogeneous Medium
Kim Olsen, Eiichi Fukuyama, Hideo Aochi, Raul Madariaga


We are in the process of the development of a hybrid method for flexible and e efficient modeling of dynamic rupture propagation and its radiation in a heterogeneous three-dimensional medium. The dynamic rupture propagation is computed using the boundary integral equation (BIE) method. The computation of radiated waves outside the fault is carried out by an efficient fourth-order staggered-grid finite-difference (FD) method. The hybrid method enables dynamic modeling of rupture propagation on curved or multi-segmented faults in laterally and vertically heterogeneous earth models with an accurate free-surface. In addition to the model of dynamic rupture on a single fault, the hybrid method can be used to model the statistics of recurrent ruptures on multiple, arbitrarily-shaped fault systems. Finally, the method may be used to improve the accuracy of kinematic source implementation on extended faults.

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