详细信息   

• 责任者：Long Feng (School of Earth and Space ; University of Science and Technology of China ; Hefei 230026 ; China) ; Zhang Yongjiu
• 刊名：Chinese Journal of Geophysics
• 出版年：2010
• 卷期：53(12)
• 关键词：强震 ; strong earthquakes ; 震源机制 ; focal mechanism ; 四川 ; Sichuan Province
• 页码：p.2852-2860
• 图表：4 illus., 4 tables, 20 refs.
• 分类号：0500
• issnNo：ISSN0001-5733
• isbnNo：CN11-2074/P

摘要

 For the M_S6.1 Panzhihua-Huili, Sichuan Province, earthquake sequence of Aug 30, 2008, this study determines the focal mechanism solutions of the mainshock event and the M_L≥4.0 aftershock events in the sequence using the CAP method and the broadband waveform records from the digital seismic networks of Sichuan Province and Yunnan Province. The result shows that the focal mechanism solution of the mainshock has two principal stress axes with low dip angles of <10°, and the principal compressive stress axis trends 140°.  One of the two nodal planes of the focal mechanism solution of the mainshock strikes in 185°, dips westward at 83°, has a rake of 5°, and shows left-lateral strike-slip faulting with a small thrust component.