河北省张北6.2级地震前的重力异常
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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 are drawn,and the dynamic variation and its characteristics of gravity anomalies before Zhangbei 6.2 in 1998 are analyzed.The results show,the earthquakes occur in the descending period of gravity;the epicenters was located near the center abnormal and locate at high grads region.
引文
[1]中国地震局监测预报司,强地震中短期预报方法及其效能研究[M],地震出版社,2002.
    [2]陆远忠等,地震中短期预报的动态图像方法[M],地震出版社,2001.
    [3]赵晓燕等,重力观测技术[M],地震出版社,1997.

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