| 上海定点形变异常特征及机理分析 |
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| 引用本文： | 王小平,尹京苑,倪友忠,陈军.上海定点形变异常特征及机理分析[J].大地测量与地球动力学,2010,30(Z1). |
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| 作者姓名： | 王小平 尹京苑 倪友忠 陈军 |
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| 作者单位： | 上海市地震局,上海,200062 |
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| 摘 要： | 2009年11月上海松江地震序列距佘山形变观测点约18 km,距查山形变台约32 km。地震前这两个定点的形变观测均出现不同程度的异常。结合形变资料和震源机制解分析结果发现,此次异常的应力方向与该区域的背景应力场方向基本一致,因此认为,观测到的形变异常很可能反映的是区域构造应力场的变化情况。
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| 关 键 词： | 松江地区 形变异常 震源机制解 应力场 地震序列 |
STUDY ON CHARACTERISTICS AND MECHANISM OF DEFORMATION ANOMALY AT SHANGHAI FIXED DEFORMATION STATIONS |
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| Wang Xiaoping,Yin Jingyuan,Ni Youzhong,Chen Jun.STUDY ON CHARACTERISTICS AND MECHANISM OF DEFORMATION ANOMALY AT SHANGHAI FIXED DEFORMATION STATIONS[J].Journal of Geodesy and Geodynamics,2010,30(Z1). |
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| Authors: | Wang Xiaoping Yin Jingyuan Ni Youzhong Chen Jun |
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| Institution: | Wang Xiaoping,Yin Jingyuan,Ni Youzhong , Chen Jun (Earthquake Adiministration of Shanghai Municiplity,Shanghai 200062) |
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| Abstract: | The distances between Shanghai Songjiang seismic sequence in Novemeber,2009 and Sheshan deformation station,Chashan deformation station are about 18 km and 32 km respectively.The deformation observations appeared of different anomaly degree at these two stations before the earthquakes.The results combined the deformation data with focal mechanism solution show that the direction of the anomaly is consistent with the direction of background stress field of this area,so we think that the observed deformation ... |
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| Keywords: | Songjiang area deformation anomaly focal mechanism solution stress field seismic sequence |
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