Slip distribution of the 2011 off the Pacific coast of Tohoku Earthquake inferred from geodetic data
Slip distribution of the 2011 off the Pacific coast of Tohoku Earthquake inferred from geodetic data
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DOI：
10.5047/eps.2011.06.023
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发表时间：
2011-01-01
影响因子：
3
通讯作者：
Sagiya, Takeshi
中科院分区：
文献类型：
--
作者：
Ito, Takeo;Ozawa, Kazuhiro;Sagiya, Takeshi
本文分析了2011年日本东北大地震的大地测量观测资料，估算了太平洋板块界面的同震和震后早期断层滑动分布。主震最大滑移量约为60 m，矩震级约为m (w) 9.0。至少在过去100年里发生的大地震中，主滑动块的位置与震源区域是互补的，最大滑动对应于大约700年的应力积累的释放。1936年、1938年和1978年地震的震源区被认为在2011年主震中再次破裂，其中滑动量明显小于主震。
We analyze geodetic observation data associated with the 2011 Tohoku Earthquake to estimate coseismic and early postseismic fault slip distribution on the Pacific plate interface. The maximum slip and the moment magnitude of the main shock are about 60 m and M(w) 9.0, respectively. The location of the main slip patch is complementary to the source region of large earthquakes at least for those which have occurred during the last 100 years, and the maximum slip was corresponded to a release of stress accumulation for about 700 years. Source regions of the 1936, 1938, and 1978 earthquakes are considered to have been re-ruptured in the 2011 main shock, where the slip amount was significantly smaller than the main patch.