文安5.1级地震前的重力场变化  

Variation of gravity field before Wenan M5.1 earthquake

作　　者：苏树朋[1] 张纳莉[1] 李非[2] 史彦华[1] 王顺昌[1] 

机构地区：[1]河北省地震局保定中心台河北,保定071000 [2]河北省地震局后土桥地震台,河北昌黎066611

出　　处：《华北地震科学》2008年第2期45-48,共4页North China Earthquake Sciences

摘　　要：绘制了重力测值的时序变化曲线和空间等值线,从动态的角度分析了2006年7月文安5.1级地震前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,震中位于重力变化高梯度区的"0"等值线附近。The timing sequence curves and spatial isolines of gravity are drawn, and the dynamic variation and its characteristics of gravity anomalies before Wenan MS. learthquake that occurred on Jul. 4, 2006 are analyzed. The results show that the process of seismogeny is relevcmt to the variation of gravity field; the epicenter usually locates near 0 isoline of high grads region.

关 键 词：文安地震 流动重力 异常特征 

分 类 号：P135.72[天文地球—天体力学]