1815年10月23日山西平陆63/4级地震及发震构造初步探讨  

Preliminary Study on Seismogenic Structure of Pinglu M63/4 Earthquake on October 23,1815

作　　者：丁学文[1,2] 高树义[1,2] 马秀芳[1,2] 

机构地区：[1]山西省地震局,山西太原030002 [2]太原大陆裂谷动力学国家野外科学观测研究站,山西太原030025

出　　处：《山西地震》2017年第1期1-6,43,共7页Earthquake Research in Shanxi

摘　　要：1815年10月23日,山西平陆发生63/4级强烈地震,该地震标志华北地震区进入一轮新的活跃期。在地震发生前后的20年间,同一地点或附近又相继发生3次43/4~51/2级地震,这些地震的发生由特殊的深部地震构造背景决定,受华北地区NEE—SWW应力场的控制,产生了NEE向的张性正断裂和NW向的挤压逆断裂,温塘张性正断裂与位村逆断裂交汇区应力闭锁、释放成为该地震发生的构造原因。A strong earthquake of M63/4 occurred in Shanxi,Pinglu on October 23,1815,which marked a new active period in the north China seismic area.In the 20 years before and after the earthquake,3times M43/4-51/2 earthquake occurred at the same location or nearby,which is rare in this period in North China.The occurrence of these earthquake is determined by deep seismic tectonic background.In north China the NEE-SWW stress field results in the NEE tensional normal fault and the NW compressional reverse fault.In the region where Wentang tensional normal fault and Weicun reverse fault meets,the stress locking and releasing are the tectonic cause for the occurrence of this earthquake.

关 键 词：构造背景 发震构造 平陆地震 

分 类 号：P315.2[天文地球—地震学]