摘要
绘制了重力测值的时变曲线和空间等值线,从动态的角度分析了1998年1月张北6.2级地震前的流动重力异常的演化及特征。结果显示,地震前的重力场呈下降变化,震中位于异常中心附近的重力变化高梯度区。
The timing sequence curves and spatial isolines of gravity variation and its characteristics of gravity anomalies before Zhangbei show, the earthquakes occur in the descending period of gravity; the variation are drawn, and the dynamic 6.2 in 1998 are analyzed. The resuhs epicenters was located near the center abnormal and locate at high grads region.
出处
《东北地震研究》
2008年第1期14-21,共8页
Seismological Research of Northeast China
关键词
张北ML6.2地震
重复重力
异常特征
Zhangbei ML6.2 earthquake
mobile gravity
characteristic of anomalies
