Co- and post-seismic slip associated with the 2005 Miyagi-oki earthquake (M7.2) as inferred from GPS data
Co- and post-seismic slip associated with the 2005 Miyagi-oki earthquake (M7.2) as inferred from GPS data
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DOI：
10.1186/bf03352662
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发表时间：
2006-01-01
影响因子：
3
通讯作者：
Hasegawa, Akira
中科院分区：
文献类型：
--
作者：
Miura, Satoshi;Iinuma, Takeshi;Hasegawa, Akira
2005年8月16日，沿着宫城县附近的板块边界发生了7.2级大地震。利用连续GPS数据和大地测量反演，研究了与此事件相关的震前和震后形变，揭示了板块间滑动的成因。同震滑动分布与地震波形反演结果吻合较好。主要滑动区局限于1978年前一次地震破裂区的东南部。震后滑动向同震滑动区西南方向延伸。这些震前和震后滑动的显著特征可能是由于1978年断裂带北部存在发震应力尚未释放的锁定板块界面所致。
A large earthquake with M7.2 occurred on August 16, 2005 along the plate boundary off Miyagi Prefecture. Co- and post-seismic deformations associated with this event were investigated to reveal the causal interplate slips using continuous GPS data and geodetic inversion. The coseismic slip distribution shows good agreement with that estimated by seismic waveform inversions. The major slip area is limited to the southeastern part of the rupture area of the previous 1978 event. The post-seismic slip extended to the southwest of the co-seismic slip area. These distinctive features of both the co- and post-seismic slips might be caused by the existence of the locked plate interface, where seismogenic stress has not released yet, in the northern part of the 1978 rupture area.