Session III:
Physically-based simulation of earthquike generation and the earthquake cycle

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



Simulation of the effects of fault creep on the stress field of its neighbor faults
Yong-Xian Zhang, Xiang-Chu Yin


Abstract

In the 2D model including three faults, the variation of stress field is simulated by 2D finite element method when one of the faults creeps with time, and the relation between fault creep and damaged area is discussed under the Coulomb's Failure Criterion. The results show that the extreme high stress regions always stand on the ends of the faults and migrate with fault creep. The variation of stress near the ends of creeping fault is larger than that in other fault ends. If the region with high stress variation is taken for the place where more "earthquake precursors" occur, the ends of creep fault are the places. The results also show that damaged regions are near the ends of the faults, and the damaged region near the creeping fault grows up with fault creeping. In other words, the seismic level near the ends of the creeping fault is higher than that near the ends of other faults.

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