| 唐山7.8级地震前后区域应力场的动态变化特征 |
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| 引用本文： | 张昭栋,刘元生,韩海华,何钧,康瑞清.唐山7.8级地震前后区域应力场的动态变化特征[J].西北地震学报,2001,23(2):169-171,193. |
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| 作者姓名： | 张昭栋 刘元生 韩海华 何钧 康瑞清 |
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| 作者单位： | 山东省地震局, |
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| 摘 要： | 利用文献1]给出的由深井水位变化反演地壳深层应力变化的方法和华北地区井水位变化资料，反演了唐山7.8级地震前后大区域应力场的动态变化过程，分析了应力场的动态调整变化特征，结果表明，唐山地震前2年，在震中区及附近出现应力下降异常区，临震前异常幅度增大并且异常区向外围扩展，震后异常区收缩并逐渐消失。
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| 关 键 词： | 唐山地震 应力场 异常特征 动态演化图像 水位 地下水 |
| 文章编号： | 1000-0844(2001)02-0169-03 |
| 收稿时间： | 2000/1/10 0:00:00 |
DYNAMIC CHANGEOF REGIONAL STRESS FIELD INVERTED BY USING WATER LEVEL DATA BEFORE AND AFTER THE TANGSHAN MS7. 8 EARTHQUAKE |
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| ZHANG Zhao-dong,LIU Yuan-sheng,HAN Hai-hu,HE Jun and KANG Rui-qing.DYNAMIC CHANGEOF REGIONAL STRESS FIELD INVERTED BY USING WATER LEVEL DATA BEFORE AND AFTER THE TANGSHAN MS7. 8 EARTHQUAKE[J].Northwestern Seismological Journal,2001,23(2):169-171,193. |
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| Authors: | ZHANG Zhao-dong LIU Yuan-sheng HAN Hai-hu HE Jun and KANG Rui-qing |
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| Institution: | Seismological Bureau of Shandong Province, Jinan 250014, China,Seismological Bureau of Shandong Province, Jinan 250014, China,Seismological Bureau of Shandong Province, Jinan 250014, China,Seismological Bureau of Shandong Province, Jinan 250014, China and Seismological Bureau of Shandong Province, Jinan 250014, China |
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| Abstract: | Dynamic change process of stress field of north China before and after the Tangshan M S7.8 earthquake is inverted by using the method inverting stress change of deep layer of the crust by reference2] and data of well water level.Dynamic change characteristics of the stress field are analyzed.The results show anomalous region with stress decrease was produced in epicenter region and its vicinity two years before the earthquake.The anomalous region expanded outward and anomalous amplitude increased before impending the earthquake.The anomalous region contracted and disappeared gradually after the earthquake. |
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| Keywords: | Tangshan earthquake Stress field Anomalous character Dynamic evolution image |
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