张北M_S6.2地震前重力异常及异常机制探讨

The gravity anomaly before the Zhangbei earthquake with M_S6.2 and analysis of its mechanism

根据晋北和辽西地区地质构造背景及力学机制 ,分析了 1 998年张北 MS6.2地震前后出现在震中外围地区的重力异常变化 ,对沿深部断裂附近出现的重力异常进行了分析讨论 。

The gravity anomaly in the far field earthquake region before the 1998 Zhangbei M S =6.2 earthquake is analyzed based on the background of geologic structure and dynamic mechanism in northern Shanxi province and western Liaoning province. It is discussed that the gravity anomaly occurred along the deep seated fault might be regarded as the seismic precursor field.