摘要
利用文献 [1 ]给出的用井水位资料反演含水层应力变化的方法和井水位动态观测资料 ,反演了大同 阳高地震前后大区域应力场的动态变化特征 .结果表明 ;应力场的零值线穿过震中区 .地震前 ,震中区周围应力场发生转向 ,由正应力区变为负应力区 ,同时正应力的量值逐渐增大 .
Dynamic change of regional stress field before and after the Datong Yanggao earthquake is inverted by using data of well water level.In the inversion,the method inverting stress change in water bearing system in reference [1] is used.The results show that the zero value line of stress field crosses epicentral regions of the Datong M S6.1 and M S5.8 earthquakes.The stress field of periphery of the epicentral region transformed from positive stress into negative stress,and the value of the positive stress increased gradually before the earthquakes.After the earthquakes,the stress field is slow in change.
出处
《西北地震学报》
CSCD
北大核心
2001年第1期66-68,共3页
Northwestern Seismological Journal
关键词
地震前兆
井水水位
大同-阳高地震
应力场
含水层
Well water level
Earthquake precursor
Datong Yanggao earthquake
Stress field
