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Remotely triggered seismicity in Yunnan, southwestern China, following the 2004 M(w)9.3 Sumatra earthquake

文献类型：期刊论文

作者Lei, Xinglin1,2; Xie, Chaodi3; Fu, Bihong4
刊名JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
出版日期2011-08-05
卷号116
ISSN号2169-9313
DOI10.1029/2011JB008245
文献子类Article
英文摘要Following the 2004 M(w)9.3 Sumatra earthquake, seismicity rate increased sharply over a wide area of up to similar to 2700 km away in Yunnan province, southwestern China. Raised seismicity lasts for similar to 14 days. During this period, more than 800 earthquakes with magnitude between 1.5 and 5.1 occurred. This is perhaps the most impressive example of remotely triggered seismicity yet observed. Major events were clustered at several sites that exhibit complex fault geometries, such as step overs and junctures. We use statistic approaches including the beta statistics to examine the statistical significance of the seismic rate increases associated with the Sumatra main shock and conclude that there is a reasonable probability that the raised seismicity was remotely triggered by the Sumatra earthquake. Both rapid onset of dynamic triggering (the very first event is a M4.6 earthquake occurred during the passage of the Rayleigh wave from the Sumatra earthquake) and delayed response (activated a few hours to a few days after the Sumatra earthquake) are well established. The triggered activities show more earthquake swarm-like characteristics as indicated by the epidemic-type aftershock sequence modeling results (large percentage of random components and less magnitude dependence in Omori law type self-triggering). Multiple sources of evidence, including intensive hydrothermal activities, and low velocity and high V-p/V-s zones in the lower to middle crust suggests that magma/mantle-generated fluids have a role in the region. High fluid pressure in branched fault zones weakened the faults, making them sensitive to external disturbances and leading to fluid-driven seismicity.
WOS关键词SAN-ANDREAS FAULT ; RELATIVE QUIESCENCE ; ANDAMAN EARTHQUAKE ; STATISTICAL-MODEL ; GEOTHERMAL-FIELD ; STRESS CHANGES ; HECTOR MINE ; FLUID-FLOW ; HEAT-FLOW ; CALIFORNIA
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000293652700002
出版者AMER GEOPHYSICAL UNION
资助机构state Key Laboratory of Earthquake Dynamics(LED2008B04) ; state Key Laboratory of Earthquake Dynamics(LED2008B04) ; National Nature Science Foundation of China(NSFC 40872126) ; National Nature Science Foundation of China(NSFC 40872126) ; state Key Laboratory of Earthquake Dynamics(LED2008B04) ; state Key Laboratory of Earthquake Dynamics(LED2008B04) ; National Nature Science Foundation of China(NSFC 40872126) ; National Nature Science Foundation of China(NSFC 40872126) ; state Key Laboratory of Earthquake Dynamics(LED2008B04) ; state Key Laboratory of Earthquake Dynamics(LED2008B04) ; National Nature Science Foundation of China(NSFC 40872126) ; National Nature Science Foundation of China(NSFC 40872126) ; state Key Laboratory of Earthquake Dynamics(LED2008B04) ; state Key Laboratory of Earthquake Dynamics(LED2008B04) ; National Nature Science Foundation of China(NSFC 40872126) ; National Nature Science Foundation of China(NSFC 40872126)
源URL[http://ir.iggcas.ac.cn/handle/132A11/73623]  
专题中国科学院地质与地球物理研究所
通讯作者Lei, Xinglin
作者单位1.Geol Survey Japan, Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058567, Japan
2.China Earthquake Adm, State Key Lab Earthquake Dynam, Inst Geol, Beijing, Peoples R China
3.Yunnan Univ, Dept Geophys, Kunming 650091, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Lei, Xinglin,Xie, Chaodi,Fu, Bihong. Remotely triggered seismicity in Yunnan, southwestern China, following the 2004 M(w)9.3 Sumatra earthquake[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2011,116.
APA Lei, Xinglin,Xie, Chaodi,&Fu, Bihong.(2011).Remotely triggered seismicity in Yunnan, southwestern China, following the 2004 M(w)9.3 Sumatra earthquake.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,116.
MLA Lei, Xinglin,et al."Remotely triggered seismicity in Yunnan, southwestern China, following the 2004 M(w)9.3 Sumatra earthquake".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 116(2011).

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来源：地质与地球物理研究所

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