1989年和1991年大同—阳高两次地震震源断层的三维特征  

Three-dimensional Characteristic of Focus Faults of the Two Earthquakes at Datong Yanggao in 1989 and 1991

作　　者：朱艾斓[1] 刁桂苓[1] 张四昌[1] 杜迎春[1] 

机构地区：[1]河北省地震局,河北石家庄050021

出　　处：《山西地震》1999年第3期15-20,共6页Earthquake Research in Shanxi

基　　金：地震科学联合基金

摘　　要：从地震学与地震地质学交叉、融合的思路出发，通过地震活动图象分析及震源机制的研究，得到了１９８９年与１９９１ 年大同—阳高两次地震震源断层的三维特征，即走向ＮＥ２５°，倾向ＮＷ，长约２０ｋｍ ，埋深５ ｋｍ ～７ ｋｍ ，宽１２ ｋｍ ，高角度，呈右旋走滑特性。指出地壳分层结构及等震线等资料与之有较好的一致性，讨论了震源断层与附近地质构造的关系。Based on the thought of the cross and fusion of seismology and geology, three dimensional characteristics of focus faults of the two earthquakes at Datong Yanggao have been acquired with analysis of seismicity pattern and focal mechanism. The strike is NE25 degree, the dip is NW, length is 20km,and buried depth is 5km～17km, width is 12km,and high angle and right lateral strike slip is its character. The consistency of the three dimensional character of the focus faults and crustal layering structure, isoseismic map is put forward. The relation between the epicenter fault and neighbor geological structure is discussed.

关 键 词：地震活动图象 震源机制 震源断层 大同-阳高地震 

分 类 号：P315.3[天文地球—地震学] P315.2[天文地球—固体地球物理学]