| 利用GPS观测反演Tokachi-Oki地震(日本)及强余震的同震滑移分布 |
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| 引用本文： | 刁法启,熊熊,李军,郑勇.利用GPS观测反演Tokachi-Oki地震(日本)及强余震的同震滑移分布[J].武汉大学学报(信息科学版),2010(3). |
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| 作者姓名： | 刁法启 熊熊 李军 郑勇 |
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| 作者单位： | 中国科学院测量与地球物理研究所;中国科学院研究生院; |
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| 基金项目： | 中国科学院知识创新工程重要方向性资助项目(KZCX2-YW-142,KZCX2-YW-116,KZCX3-SW-153); 国家自然科学基金资助项目(40474028) |
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| 摘 要： | 根据GPS观测的Tokachi-Oki地震及强余震引起的地表位移,采用基于敏感性探测的方法反演了两次地震分别引起的断层滑移。反演过程中,考虑了更切合实际的分层地球模型和断层面几何形状。主震和强余震滑移量的最大值分别为3.07m和0.33m,相应的矩震级分别为Mw7.94和Mw7.1,与地震波形反演的结果基本一致。另外,从主震和强余震的滑移分布来看,强余震的滑移主要分布在主震破裂较小的区域,一种合理的解释是,主震的破裂过程增加了邻区断层面上的能量积累,导致了强余震的发生。
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| 关 键 词： | Tokachi-Oki地震 GPS 同震形变 位错模型 |
Slip Distribution of 2003 Tokachi-Oki (Japan) Earthquake Derived from Coseismic GPS Observation |
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| DIAO Faqi, XIONG Xiong LI Jun ZHENG Yong.Slip Distribution of 2003 Tokachi-Oki (Japan) Earthquake Derived from Coseismic GPS Observation[J].Geomatics and Information Science of Wuhan University,2010(3). |
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| Authors: | DIAO Faqi XIONG Xiong LI Jun ZHENG Yong |
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| Institution: | DIAO Faqi1,2 XIONG Xiong1 LI Jun1 ZHENG Yong1(1 Institute of Geodesy , Geophysics,Chinese Academy of Sciences,340 Xudong Street,Wuhan 430077,China)(2 Graduate School of Chinese Academy of Sciences,A19 Yuquan Road,Beijing 100049,China) |
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| Abstract: | With the observed GPS coseismic displacements of Tokachi-Oki Earthquake and its biggest aftershock,we derive the coseismic slip distributions of the two earthquakes using SBIF(sensitivity-based iterative fitting)method.A more real fault geometry and layered Earth model were considered in the inverted process.As results shown,the maximal slips of the main shock and the biggest aftershock are 3.07 m and 0.33 m respectively.The corresponding moment magnitude scale are Mw 7.94 and Mw 7.1,which is consistent wit... |
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| Keywords: | Tokachi-Oki Earthquake GPS coseismic deformation slip distribution |
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