2009年新疆柯坪块体3次5级地震前异常分析

Analysed on the anomaly before three M_S 5 earthquakes occurred in Keping Block,Xinjiang in 2009

研究2009年柯坪块体3次5级地震前的地震活动和前兆观测结果表明:3次5级地震前,柯坪块体存在5级地震平静的长期异常,4级地震多次平静、增强交替活动的中期异常,小震集中活动的短期异常;地震发生的短临阶段,震中附近的阿合奇地震台地倾斜、乌什地震台水管倾斜仪及地磁、地电和巴楚地应力存在不同程度的短临异常。参考汶川地震,有关专家对地震预报和震前异常的新思考和新认识,结合3次5级地震的类型和错断方式,分析震前小震活动和前兆异常,并对震前地震活动和前兆异常进行了综合分析和探讨。

We study earthquake activities and precursory observation before three Ms 5 earthquakes occurred in Keping Block, Xinjiang in 2009. The study has shown that before three Ms 5 earthquakes occurred, Keping Block, there exist calm long-term anomaly of Ms 5 earth- quakes, enganced alternate active middle-term anomalies and concentrative active small earthquakes of short-term anomaly. At impend, different impending anomalies occurred in the ground tilt water pipe in Aheqi, the geomagnetic and geo-electricity in Wushi and soil- stress in Bachu. Referring the new reasons and the new opinion, put forward by the relation- al experts after the Wenchuan earthquake, to earthquake prediction and precursory anomaly, and combining earthquake types and fault modes of three earthquakes with Ms 5, the small earthquakes activities and precursory anomaly before earthquakes are analyzed and discussed in this paper.