Examination on Consecutive Rupturing of Two Close Faults by Dynamic Simulation

Abstract eng:
It is necessary to judge whether the active faults located closely to each other will rupture together or independently for predicting the magnitude and the probability of the next earthquake. In this paper, we carried out some basic examinations on the consecutive rupturing of the two adjacent active faults by the dynamic rupture simulation based on the slip-weakening model. Our results showed that the following conditions were needed for the second fault to rupture completely after the first left-lateral fault ruptured: 1) lower strength excess normalized by dynamic stress drop, 2) narrower depth and smaller negative stress drop of the inactive area between the two faults, and 3) right step of the second fault rather than left step.

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