| 山西大同—阳高6．1级地震形变异常的再研究 |
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| 引用本文： | 王秀文.山西大同—阳高6．1级地震形变异常的再研究[J].山西地震,2001(1):1-8. |
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| 作者姓名： | 王秀文 |
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| 作者单位： | 山西省地震局, |
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| 摘 要： | 在对山西大同－阳高1989年6．1地震的震例总结中，共收集了23项形变异常，经过对资料的整理研究，又发现了13项。经过进一步总结形变异常的演化特征及物理机制，表明形变异常在震前具有多样性，震源区出现了闭锁现象。中期趋势异常主要受区域应力场的控制，短临异常反映了震源应力场的变化，异常的空间分布是震源应力场和区域应力场相互作用的结果。
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| 关 键 词： | 地形变异常 地形变前兆 大同－阳高地震 应力场 异常机制 |
| 文章编号： | 1000-6265（2001）01-0001-08 |
| 修稿时间： | 2000年9月20日 |
Restudy on the Ground
Deformation Anomaly Related to the Datong-Yanggao Shanxi , Ms6.1 Earthquake |
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| WANG Xiu-wen.Restudy on the Ground
Deformation Anomaly Related to the Datong-Yanggao Shanxi , Ms6.1 Earthquake[J].Earthquake Research in Shanxi,2001(1):1-8. |
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| Authors: | WANG Xiu-wen |
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| Abstract: | In the previous study about the Datong Yanggao Ms 6.1 earthquake ,23 ground deformation anomalies were worked out.13 new ground deformation anomalies are found by the reanalysis of the data. A new study based on the evolution characteristics and the physical mechanisms of the ground deformation anomaly shows that the anomalies appeared before the earthquake are of multiformity. The locking presents in the source region. The medium term anomalies are mainly controlled by the regional stress field and the short impending anomalies are related to the changes of the stress around the source. The abnormal spatial distribution of the ground deformation is resulted from the interaction between the regional stress field and the stress field around the source. |
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| Keywords: | Ground deformation anomaly Crustal deformation precursor Datong Yanggao earthquX |
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