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Journal: Earthquake Research In China  2017 No.1  Share to Sinaweibo  Share to QQweibo  Share to Facebook  Share to Twitter    clicks:634   
Title:
汶川地震前后太原盆地应力场变化特征研究
The variation characteristics of stress field of the Taiyuan Basin before and after the Wenchuan earthquake
Author: 张淑亮,刘瑞春,王霞
Adress: 山西省地震局
Abstract: 摘要:
利用小震震源机制解、地震视应力、GPS测量结果等资料，对汶川地震前后太原盆地应力场变化特征进行了研究。结果表明，汶川地震对太原盆地构造应力场的影响较为显著，不仅改变了应力场的方向，也改变了应力值的大小；应力场特征由震前NNE-SSW向拉张应力的局部小区域应力场为主，转为震后NEE-SWW向挤压应力为主且接近华北地区应力场。该变化态势有利于局部应变能积累，因而可能是太原盆地中小地震活跃的诱发因素。
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