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收集了1970～2006年37年的小震初动符号建立了震源机制解数据库,研究了山西断陷带小震综合机制解时空演化特征.结果表明:山西断陷带小震综合机制解以走滑正断层为主,断陷带两端以拉张作用为主,中部地区以剪切作用为主,忻定盆地、太原盆地的区域应力场与华北区域应力场差异较大.利用沿山西断裂带布设的GPS监测网1996～2007年12期复测资料,分析了山西断裂带水平运动与地震活动的关系.结果表明:山西断裂带现主要受NWW-SEE向压应力场、NNE-SSW向张应力场的控制.1998～1999年有一次较为明显的应力扰动,空间上表现为北强南弱,接着发生了1999年11月1日大同—阳高5.6级地震.
A series of focal mechanism solution databases were collected for the first 37 years of small earthquakes from 1970 to 2006. The temporal and spatial evolution of the integrated mechanism solution of small earthquakes in Shanxi rift zone was studied.The results show that Slip faults and faulting faults are the main faults in the fault zone, while the middle part is mainly shear. The regional stress field in Xinding basin and Taiyuan basin is quite different from the stress field in North China. The results show that the Shanxi fault zone is mainly affected by compressive stress field and NNE-SSW direction of NWW-SEE Zhang stress field of control.From 1998 to 1999 there was a more obvious stress disturbance, the spatial performance of the north and south weakness, followed by the November 1, 1999 Datong-Yanggao M 5.6 earthquake.