周边地区强震对新疆境内中强地震活动的影响分析

Influences of Surrounding Strong Earthquakes on Moderate to Strong Earthquake Activities within Xinjiang

该文基于1950年以来新疆周边强震与境内中强地震活动的统计分析结果,解算了1976—2007年新疆周边强震活跃、境内相对平静时段,周边3组强震产生的库仑应力变化,并结合其后3年新疆地区中强地震活动特征,分析探讨了周边强震活动对境内地震活动的影响作用。结果表明,新疆周边这3组强震活动对新疆境内具有一定程度的减震作用。

Based on the statistical results of the relations between strong earthquake surrounding Xinjiang and moderate-strong earthquake within Xinjiang from 1950 , this paper calculates Coulomb failure stress changes of three groups of strong earthquakes surround- ing Xinjiang during the active phase outside Xinjiang and the quiet phase inside Xinjiang from 1976 to 2007. Combining Xinjiang moderate-strong earthquake activity 3 years after these strong earthquakes, we analyze and discuss the influence of strong earthquakes sur- rounding Xinjiang on seismic activities within Xinjiang. The results show that the three groups of strong earthquake activities surrounding Xinjiang mitigate to a certain extent the seismic hazard in Xinjiang.