Improvements for the Strike/Dip-Slip Displacement Theory
Formula of General Dip Fault
1 State Key Laboratory of Earthquake Dynamics, Institute of Geology，CEA,A1 Huayanli, Beijing 100029，China
2 Key Laboratory of Earthquake Prediction,Institute of Earthquake Science, CEA,63 Fuxing Road, Beijing 100036, China
3 First Crust Monitoring and Application Center, CEA, 7 Naihuo Road,Tianjin 300180, China
4 Department ofCivil and Structural Engineering, Graduate School of Engineering, Kyushu University, Fukuoka, 819-0395 ,Japan
Abstract：Savage’s strike-slip formula was improved in this paper, by retaining the original formula to reflect the characteristics of the strike-slip fault and containing the information on fault dip, which reflects the influence of fault dip to surface displacement. When the fault dip is not vertical, the conclusions are as follows: 1) The center of inter-seismic deformation curve is not at the fault outcropping but at the fault lock and slide boundary which projects to the surface. 2) There is the geometric relationship between fault dip δ and locking depth d：tanδ=d/doffset. 3) The earthquake ruptures along the fault plane, its location is inconsistent with the center of the inter-seismic deformation curve, so the displacement of upper and lower plates is asymmetry when earthquake occurs. Because this process is applicable to dip-slip faults, improved dip-slip fault displacement formula is given in the paper.
ZOU Zhenyu,JIANG Zaisen,WU Yanqiang et al. Improvements for the Strike/Dip-Slip Displacement Theory
Formula of General Dip Fault[J]. jgg, 2015, 35(3): 460-463.
