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 .地震发生后应力场呈缓慢变化 Using the data of wells [1] for the inversion of aquifer stress and the dynamic observation data of well water level, the dynamic characteristics of the stress field in the large area before and after the Datongyanggao Earthquake are retrieved. The results show that the stress field The zero line passes through the epicenter area, and before the earthquake, the stress field around the epicenter area turns from normal stress area to negative stress area, meanwhile, the normal stress value gradually increases, and the stress field changes slowly after the earthquake