THE INFLUENCE OF THE 2014 JINGGU M_S 6.6 EARTHQUAKE ON THE SEISMIC RISK OF THE NANTINGHE FAULT ZONE IN YUNNAN PROVINCE, CHINA

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• 作者：SUN Hao‐Yue ; JIANG Guo‐Yan ; HE Hong‐Lin ; XU Xi‐Wei ; WEI Zhan‐Yu ; GAO Wei
• 刊名：Chinese Journal of Geophysics
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：59
• 期：2
• 页码：180-189
• 全文大小：21.1MB
• ISSN：2326-0440

文摘

The Nantinghe fault zone (NFZ), which divides the southwest Yunnan bock (SYB) into two sub-blocks, is the longest one of NE striking left-lateral strike-slip faults in the SYB with a total length of ∼380 km. Although it is very active in the late Quaternary, only an M ∼ 7 earthquake occurred on its southern segment in 1941 and since then there has been no earthquake of M > 5 recorded on the other segments of the NFZ. Therefore, the NFZ might be in the stage of stress accumulation for a large earthquake. The 2014 Jinggu M_s 6.6 earthquake is ∼94 km southeast away from the NFZ, the long axes of aftershock distribution and seismic intensity contours strike in northwest and point to the NFZ. This study attempts to reveal its influence on the static Coulomb stress on surrounding faults, especially the NFZ, and to analyze the seismic risk of the NFZ.