| 张北6.2级地震及大同5.6级地震前的流动重力异常 |
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| 引用本文： | 苏树朋.张北6.2级地震及大同5.6级地震前的流动重力异常[J].华北地震科学,2007,25(4):55-58. |
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| 作者姓名： | 苏树朋 |
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| 作者单位： | 河北省地震局保定地震中心台,河北,保定,071000 |
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| 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。
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| 关 键 词： | 张北地震 大同地震 流动重力 异常特征 |
| 文章编号： | 1003-1375（2007）03-0055-04 |
| 收稿时间： | 2007-04-30 |
| 修稿时间： | 2007年4月30日 |
The gravity anomaly before Zhangbei M6.2 and Datong M5.6 earthquakes |
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| SU Shu-peng.The gravity anomaly before Zhangbei M6.2 and Datong M5.6 earthquakes[J].North China Earthquake Sciences,2007,25(4):55-58. |
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| Authors: | SU Shu-peng |
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| Abstract: | 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. |
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| Keywords: | Zhangbei earthquake Datong earthquake mobile gravity characteristic of anomalies |
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