2007年宁洱6.4级地震发震构造分析

Seismogenic Structure of the 2007 Ning'er,Yunnan,M_S6.4 Earthquake

在论述发震构造背景的基础上,利用GIS综合分析了宁洱震区的构造、烈度等震线、地震序列、地表形变带、强震动、震源机制、重要宏观异常等发震构造标志。结果表明,NW向普洱断裂是宁洱6.4级地震的主要发震构造,部分余震可能与NE向孟连—墨江断裂活动有关。

A Ms6.4 earthquake shook the Ning＇er region of Yunnan on June 3, 2007. Combining with the structural setting in the Ning＇er seismic area, we used GIS to synthetically analyze the structure marks of the earthquake preparation, including the structure in the seismic area, isoseismals, earthquake sequence, ground deformation zone, strong ground motion, focal mechanism solution and important macroanomalies. The result indicates that the NW-direction Pu＇er （Ning＇er） fault is the main seismogenic structure of the Ning＇er earthquake, while some aftershocks are probably caused by the activity of the NE-direction Menglian-Mojiang fault.