Hybrid Modeling of Curved Fault Radiation in a 3D Heterogeneous Medium

We are in the process of the development of a hybrid method for flexible and efficient modeling of dynamic rupture propagation and its radiation in a heterogeneous three-dimensional medium. The dynamic rupture propaga-tion is computed using the boundary integral equation (BIE) method. The computation of radiated waves outside the fault is carried out by an effi-cient 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 sin-gle 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