Primary Research on the Coulomb Stress Triggering of the Tohoko M_W9.0 Earthquake, 2011

详细信息   

• 责任者：Sheng Shuzhong (Institute of Disaster Prevention ; Sanhe 065201 ; China) ; Wan Yongge
• 刊名：Seismology and Geology
• 出版年：2012
• 卷期：34(2)
• 关键词：大震 ; great earthquakes ; 日本 ; Japan
• 页码：p.325-337
• 图表：6 illus., 1 table, 28 refs.
• 分类号：0500
• issnNo：ISSN0253-4967
• isbnNo：CN11-2192/P

摘要

///In this research, the authors made a primary research on the Coulomb stress triggering of the March 11, 2011 M_W9.0 Tohoku earthquake sequence by using the software of Coulomb 3.2, the earthquake rupture models obtained by Hayes and Guangfu Shao et al., and the aftershocks data from Harvard CMT catalogue (Centroid Moment Tensor) and Japan F-net catalogue. The results suggest that： Firstly, the M_W7.2 foreshock,which occurred on March 9, has stress triggering effect on the M_W9.0 main shock. Secondly, the statistical result of the aftershocks triggered by the main shock shows that different statistical results would be obtained when using different main shock rupture model, aftershock catalogue, equivalent friction coefficient and different nodal plane of focal mechanism as the receive plane. And thirdly, when calculating the Coulomb stress by using earthquake focal mechanism, the shear stress on the two nodal planes is the same theoretically.