摘要
绘制了重力的时序变化曲线和空间等值线,从动态的角度分析了1998年张北6.2级地震和1999年大同5.6级地震前后的流动重力异常的演化及特征。结果显示,地震的孕育过程与重力场变化有关,地震发生在重力下降的异常时段,震中位于重力变化高梯度区。
The Temporal sequence curves and spatial isolines of gravity variation are drawn, and the dynamic variation and its characteristics of gravity anomalies before Zhangbei 6.2 and Datong 5.6 earthquales in 1999 are analyzed. The results show, the process of seismogeny is relative to the variation of gravity field; earthquakes usually occur in the descending period of gravity; the epicenters are usually located at high grads region.
出处
《华北地震科学》
2007年第4期55-58,共4页
North China Earthquake Sciences
关键词
张北地震
大同地震
流动重力
异常特征
Zhangbei earthquake
Datong earthquake
mobile gravity
characteristic of anomalies
