Seismic Impact of the Mw 9.0 Tohoku Earthquake in Eastern China
Seismic Impact of the Mw 9.0 Tohoku Earthquake in Eastern China
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DOI：
10.1785/0120130274
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发表时间：
2014-06
影响因子：
3
通讯作者：
Jia Cheng;Mian Liu;W. Gan;Xi-wei Xu;Fu-qiong Huang;Jie Liu
中科院分区：
文献类型：
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作者：
Jia Cheng;Mian Liu;W. Gan;Xi-wei Xu;Fu-qiong Huang;Jie Liu
摘要2011年日本东北地区发生地震（Mw 9.0），导致中国东部大部分地区发生重大同震位移，该地区地震活动强烈，造成多起破坏性地震。东北大地震改变了中国东部的应力场和地震活动吗？在这里，我们使用层状球形地球的粘弹性变形模型来计算地震同震和震后位移，并将结果与全球定位系统（GPS）数据进行了比较。利用最佳拟合模型，我们计算了中国东部主要活动断裂的同震和震后库仑应力变化。结果表明，东北大地震对这些断层的库仑应力变化小于0.002MPa，不太可能显著改变应力场或触发中国东部地震。在线资料：东北9.0级地震前后67个台站的同震位移和随时间变化的位移表。
Abstract The 2011 Tohoku earthquake ( M w 9.0) in Japan caused significant coseismic displacement in much of eastern China, where seismic activity has been intense and damaging earthquakes numerous. Did the Tohoku earthquake change the stress field and seismic activity in eastern China? Here, we used a viscoelastic deformation model of layered spherical earth to calculate the coseismic and postseismic displacements and compared the results with Global Positioning System data for eastern China. Using the best‐fitting model, we then calculated the coseismic and postseismic Coulomb stress changes on major active faults in eastern China. Our results show that the Coulomb stress changes caused by the Tohoku earthquake on these faults are less than 0.002 MPa, so were unlikely to significantly alter the stress field or trigger earthquakes in eastern China. Online Material: Tables of coseismic displacement at 67 stations and time‐dependent displacements before and after the M 9.0 Tohoku earthquake.