Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Chinese Journal of Geophysics》 2015-04
Add to Favorite Get Latest Update

Seismogenic structure of the M6.3 Kangding earthquake sequence on 22 Nov.2014,Southwestern China

YI Gui-Xi;LONG Feng;WEN Xue-Ze;LIANG Ming-Jian;WANG Si-Wei;Earthquake Administration of Sichuan Province;Sichuan Seistech Corporation Ltd.;State Key Laboratory of Earthquake Dynamics,Institute of Geology, China Earthquake Administration;Institute of Geology,China Earthquake Administration;  
On 22 Nov.2014,an M6.3earthquake hit Kangding County in Sichuan Province,southwestern China.3days later,another M5.8earthquake occurred in the same region,about10 km southeastwards from the epicenter of the M6.3mainshock.Both earthquakes were on the NW-striking Xianshuihe fault zone where no M≥6.0earthquakes were reported after the 1982M6.0Ganzi event.From the relocated aftershock distribution and focal mechanism solutions,we aim to analyze the seismogenic structure of the 2014 M6.3Kangding earthquake sequence.Along with the analysis on the characteristics of the strong earthquake ruptures and the spatial distribution of the relocated small earthquakes,we will further discuss the future strongearthquake risk between Daofu and Kangding on the central segment of the Xianshuihe fault zone.Based on the digital waveform data from China National Seismic Network and Sichuan Regional Network,the Kangding earthquake sequence was relocated by a multi-step locating method developed by Long et al.The focal mechanism solutions and the centriod depths of the M6.3and M5.8earthquakes were inverted simultaneously by the gCAP(generalized Cut and Paste)moment tensor inversion method.The spatial-temporal distribution of the M≥6.5strong earthquake ruptures since 1725 and the focal depth distribution of relocated small earthquakes from Jan.2001 to Oct.2014 along the central-southern segment of the Xianshuihe fault zone were used to identify the potential seismogenic region of the next strong earthquakes on the segment between Daofu and Kangding.The epicentral relocation of the M6.3 mainshock is at 101.69°E、30.27°N,and its initial rupture depth is about 10 km,while the centroid depth is 9km;the relocated M5.8earthquake is at 101.73°E、30.18°N with the initial rupture depth at about 11 km and the centroid depth of9 km.The moment tensor solutions from gCAP method show that the two events are dominated by the double-couple component.The parameters of the best double-couple solutions are as follows,strike 143°,dip 82°,rake-9°for nodal planeⅠ,and strike 234°,dip 81°,rake-172°for nodal planeⅡ for the M6.3earthquake.For the M5.8earthquake,the parameters are listed as,strike 151°,dip 83°,rake-6°for the nodal planeⅠ,and strike 242°,dip 84°,rake-173°for the nodal planeⅡ.Most aftershocks during the first 3days were distributed on the NW side of the M6.3mainshock,and majority of the aftershocks after M5.8earthquake were concentrated around the epicenter of the M5.8event.The average focal depth of the 459 relocated earthquakes of the sequence is about 9 km.Focal depth distribution reveals that the sequence mainly concentrated in the depth range of 6~11km and most of the aftershocks are shallower than the M6.3and M5.8earthquakes.The seismic source scale is estimated to be about 30 km in length and 4km in width with 6km in depth according to the aftershock distribution.On the space-time diagram of the historical M ≥6.5strong earthquake ruptures,we observe a gap on the Selaha fault of the central Xianshuihe fault zone,where no M≥6.5earthquakes occurred since the 1748M61/2event.Aseismic gap below the depth 7km between Kangding and Tagong and a lowseismicity region below the depth 2km between Tagong and Songlinkou were identified on the vertical cross-section of the relocated small earthquakes since 2001 along the central-southern segment of the Xianshuihe fault zone.The nodel planeⅠ of the focal mechanism solution was interpreted as the coseismic rupture plane for the M6.3and M5.8earthquakes based on the aftershock distribution and the fault strike.Both earthquakes are of left-lateral strike-slip faulting with some normal component.The relocated M6.3earthquake and its aftershocks during the first three days are on the NW-striking Selaha fault with a near-vertical dip angle of 82°,while the M5.8earthquake and its adjacent aftershocks are on the northern portion of the NW-striking Zheduotang fault with a dip angle of83°,implying that the M5.8earthquake on the Zheduotang fault may be induced by the M6.3earthquake in the adjacent Selaha fault.The scarce aftershock region around the M6.3mainshock may belong to a relatively large asperity where the accumulated energy was totally released as the M6.3mainshock occurred.The 2014 M6.3Kangding earthquake sequence occurred within the Selaha strong-earthquake rupture gap between Qianning and Kangding.Due to the duration of quiescence longer than the estimated average recurrence interval for the M7 earthquakes,we propose that the ruptures of the M6.3and M5.8earthquakes are too limited to fill up the gap,posing future M7 earthquake risk on the Selaha and its adjacent Qianning segments along the central segment of the Xianshuihe fault zone.Since most area of the previous seismic gap below the depth 7km between Kangding and Tagong along the central-southern Xianshuihe fault zone was filled by the 2014 M6.3Kangding earthquake sequence,and the most likely place of future strong earthquake occurrence will be below the segment between Tagong and Songlinkou where low seismicity is observed.
【Fund】: 四川赛思特科技有限责任公司西部大开发优惠政策节税资金投资项目(XDK2015001);; 国家科技支撑计划(2012BAK19B01-01);; 国家重点基础研究计划(973)(2008CB425701);; 中国地震局2015年地震大形势跟踪研究专项经费共同资助
【CateGory Index】: P315.2
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
Chinese Journal Full-text Database 10 Hits
1 YI Gui-xi,FANG Jun,WEN Xue-ze;Study on faulting behavior and fault-segments for pot-ential strong earthquake risk along the central- southern segment of Xianshuihe fault zone based on current seismicity[J];Earthquake;2005-01
2 Zhang Jiatao Yao Guangliang (Seismological Bureau of Sichuan Province);THE CHARACTERISTIC OF SEGMENTED ACTIVITY OF XIANSHUIHE FAULT ZONE[J];Crustal Deformation and Earthquake;1990-03
3 YI Gui-Xi1,2,WEN Xue-Ze2,SU You-Jin31 Chengdu University of Technology,Chengdu 610059,China2 Earthquake Administration of Sichuan Province,Chengdu 610041,China3 Earthquake Administration of Yunnan Province,Kunming 650041,China;Study on the potential strong-earthquake risk for the eastern boundary of the Sichuan-Yunnan active faulted-block,China[J];Chinese Journal of Geophysics;2008-06
4 SHAO Zhi-Gang~1,ZHOU Long-Quan~(2*),JIANG Chang-Sheng~3, MA Hong-Sheng~1,ZHANG Lang-Ping~1 1 Institute of Earthquake Science,CEA,Beijing 100036,China 2 China Earthquake Networks Center,Beijing 100045,China 3 Institute of Geophysics,CEA,Beijing 100081,China;The impact of Wenchuan Ms8.0 earthquake on the seismic activity of surrounding faults[J];Chinese Journal of Geophysics;2010-08
5 Qian Hong(Seismological Bureau of Sichuan Province);FAULTED LANDFORMS ALONG THE XIANSHUIHE FAULT ZONE AND THEIR SEISMOLOGICAL SIGNIFICANCE[J];Seismology and Geology;1989-04
8 WEN XUEZE,C. R. ALLEN,LUO ZHUOLI QIAN HONG,ZHOU HuAWEi and HUANG WEISHIScismological Bureau of Sichuan Province.Scismological Laboratory,California Institute of Technology.Center for Analysis and Prediction,State Seitmologicai Bureau.;SEGMENTATION, GEOMETRIC FEATURES,AND THEIR SEISMOTECTONIC IMPLICATIONS FOR THE HOLO-CENE XIANSHUIHE FAULT ZONE[J];Acta Seismologica Sinica;1989-04
9 Zhou Rongjun He Yulin Huang Zuzhi Li Xiaogang Yang Tao(Seismological Bureau of Sichuan Province, Chengdu 610041, China);THE SLIP RATE AND STRONG EARTHQUAKE RECURRENCE INTERVAL ON THE QIANNING—KANGDING SEGMENT OF THE XIANSHUIHE FAULT ZONE[J];Acta Seismologica Sinica;2001-03
10 Wan Yongge1,2), Shen Zhengkang3) Sheng Shuzhong1) Xu Xiaofeng4) 1) Institute of Disaster Prevention Science and Technology, Yanjiao, Sanhe City, Hebei Province, 065201, China 2) State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, China 3) Department of Geophysics, School of Earth and Space Science, Peking University, Beijing 100871, China 4) Institute of Geophysics, China Earthquake Administration, Beijing 100081, China;The influence of 2008 Wenchuan earthquake on surrounding faults[J];Acta Seismologica Sinica;2009-02
Chinese Journal Full-text Database 10 Hits
1 Fu Weizhou Wu Yubao(Changchun College of Geology) (Geological Bureau of Sichuan Province);CHARACTERISTICS OF THE RECENT TECTONIC STRESS FIELD OF PANXI RIFT VALLEY ZONE AND ITS VICINITY[J];;1986-03
2 TENG Ji-wen1,2,LIU Cai2,HAN Li-guo2,RUAN Xiao-min1,YAN Ya-fen1,ZHANG Yong-qian11.Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China2.College of GeoExploration Science and Technology,Jilin University,Changchun 130026,China;The Dynamical Mechanism for Medium Rapture and Motion of Deep Matler on Wenchuan-Yingxiu M_S8.0 Earthquarce,2008[J];Journal of Jilin University(Earth Science Edition);2009-04
3 Yao Xin1,Zhang Yong-shuang1,Xiong Tan-yu1,Sun Yue2 1.Key Laboratory of Neotectonic Movement & Geohzards,Ministry of Land and Mineral Resource/ Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,China 2.Geotechnical Engineering Sub-Company of China Petroleum Engineering Corporation,Beijing 100085,China;Analysis of Geoseismic Faults Movement and Aftershocks Migration for Yushu Earthquake Based on InSAR Co-Seismic Deformation[J];Journal of Jilin University(Earth Science Edition);2012-02
4 BO Jingshan1,2,QI Wenhao2,LIU Hongshuai2,LIU Bo2,LIU Dedong2,SUN Youwei2(1.Institute of Disaster Prevention Science and Technology,Sanhe 065201,China;2.Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China);Abnormality of seismic intensity in Hanyuan during Wenchuan earthquake[J];Journal of Earthquake Engineering and Engineering Vibration;2009-06
5 ZHANG Jiaming1,LIU Wenlian2,XU Zemin1,LI Qiankun1(1.Department of Civil Engineering,Kunming University of Science and Technology,Kunming 650500,China; 2.Kunming Prospecting Design Institute of China Nonferrous Metals Industry,Kunming 650051,China);Experimental research on dynamic characteristics of Xigeda formation claystone in Xichang[J];Journal of Earthquake Engineering and Engineering Vibration;2012-01
6 ZHANG Yue-qiao 1 ,YANG Nong 1 ,MENG Hui 2 ,CHEN Wen 3 (1.Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing100081,China;2.China Institute of Geological Environment Measurement,Beijing100081,China;3.Institute of Geology,Chinese Academy of Geological Sciences,Beijing100037,China);Late Cenozoic tectonic deformation history and uplift process of the Panxi region,western Sichuan[J];Chinese Geology;2004-01
7 Cheng Erlin (Seismological Bureau of Chanxi Province)Pang Minghu (Seismological Bureau of Sichuan Province);TEMPORAL CHARACTERISTICS OF ORIENTATIONS OF AVERAGE STRESS AXES BEFORE AND AFTER THE 1976 YAN YUAN-NING LANG EARTHQUAKE OF M=6.7[J];Earthquake;1985-06
8 Wang Liping(Center for Analysis and Prediction, SSB);MEAN STRESS FIELD IN ZIPINGPU AREA IN SICHUAN PROVINCE[J];Earthquake;1993-01
9 YI Gut-xi; WEN Xue-ze (Seismological Bureau of Sichuan Province, Chengdu 610041, China);Application of the time-and magnitude predictable model to seismic hazard assessment in segmentation of the north-south seismic belt[J];EARTHQUAKE;2000-01
10 YANG Gang sheng, ZHAO Gen mo, MA Shu qin(Seismological Bureau of Tianjin Municipality, Tianjin 300201, China);Earthquake recurrence mode and seismic risk in middle Bohai Sea and Jiaoliao Haixia[J];EARTHQUAKE;2000-04
China Proceedings of conference Full-text Database 4 Hits
1 Zuan Chen~(a,c,*),Banghui Lin~b,Wuming Bai~a,Xu Cheng~a,Yunsheng Wang~c a Key Laboratory of the Study of Earth's Deep Interior,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China b Institute of Geophysics,Chinese Seismological Bureau,Beijing 100081,China c State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu,610059,China;A study on the influence of the 2008 Wenchuan earthquake on the stability of the Qinghai-Tibet Plateau tectonic block system[A];[C];2012
2 Shifeng Wang~* Key Lab ofLithosphere Tectonic Evolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100085,China Chun Fan Gang Wang Key Lab ofLithosphere Tectonic Evolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China Erchie Wang Key Lab ofLithosphere Tectonic Evolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100085,China;Late Cenozoic deformation along the northwestern continuation of the Xianshuihe fault system,Eastern Tibetan Plateau[A];[C];2009
3 Shan Bin Xiong Xiong Zheng Yong Jin Bikai;Earthquake stress interaction in Northeastern Songpan-Ganzi Block and its implication for earthquake hazard[A];[C];2011
4 CHEN Xuejun LU Lixia XIAO Guiyuan QI Yunlai (Guilin University of Technology,Guilin 541004);THE SEISMIC HAZARD ANALYSIS ON ANNINGHE-ZEMUHE FAULT ZONE[A];[C];2012
【Secondary Citations】
Chinese Journal Full-text Database 10 Hits
1 Zhu Jieshou;Cso Jiamin;Liu Shunhua;Jiang Guofang;Yu Min;Jiang Hualin Chengdu College of Geology Seismological Bureau of Sichuan Proviuce;A PRELIMINARY INVESTIGATION ON CRUSTAL STRUCTURE OF WESTERN SICHUAN BY EXPLOSION SEISMOLOGY[J];;1984-03
2 ZHU Jie-shouDepartment of Geophysics,Chengdu University of Technology, Chengdu 610059,China;The Wenchuan earthquake occurrence background in deep structure and dynamics of lithosphere[J];Journal of Chengdu University of Technology(Science & Technology Edition);2008-04
3 LI Yong1,ZHOU Rong-jun2,DONG Shun-li1,ZHANG Yi1,HE Yu-lin1,2,CHEN Hao1,YAN Liang1,QIAO Bao-cheng1,MA Bo-lin11.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology,Chengdu 610059 China;2.Institute of Earthquake Engineering,Seismological Bureau of Sichuan Province,Chengdu 610041,China;Surface rupture,thrusting and strike-slipping in the Wenchuan earthquake of Sichuan,China[J];Journal of Chengdu University of Technology(Science & Technology Edition);2008-04
4 CHE Zhao hong, ZHANG Yan mei (Center for Comprehensive Surveying, CSB, Beijing 100039, China);The recent fault activity along the middle and southern segments of South-North Seismic Belt[J];Earthquake;2001-03
5 YI Gui-xi,FANG Jun,WEN Xue-ze;Study on faulting behavior and fault-segments for pot-ential strong earthquake risk along the central- southern segment of Xianshuihe fault zone based on current seismicity[J];Earthquake;2005-01
6 ZHANG Guo-min1,SHAO Zhi-gang1,LIU Gui-ping2,MA Hong-sheng1(1.Institute of earthquake Science,CEA Beijing 100036,China;2.CEA,Beijing 100036,China);Analysis on the Geodynamic Cause of the Wenchuan 8.0 Earthquake[J];Earthquake;2009-01
7 Liu Dongxun Liu Wentai ( The Seismological Bureau of Sichuan Province);DIVISION OF EARTHQUAKE DANGER ZONE USING GRAVITY DATA IN SICHUAN AREA[J];Crustal Deformation and Earthquake;1988-03
8 Ge Peiji (Survey Brigade, Seismological Bureau of Sichuan Province);DISCUSSION ABOUT SOME PROBLEMS ON THE SHORT-BASELINE ACROSS FAULT[J];Crustal Deformation and Earthquake;1988-03
9 Zhang Jiatao Yao Guangliang (Seismological Bureau of Sichuan Province);THE CHARACTERISTIC OF SEGMENTED ACTIVITY OF XIANSHUIHE FAULT ZONE[J];Crustal Deformation and Earthquake;1990-03
10 Lu Yipei,Wang Lan and Su Qing (Geodetic Brigade of Seismological Bureau of Sichuan Province, Ya’an 625000);CHANGES OF FRACTAL DIMENSION OF FAULT CREEP AND THEIR RELATIONS TO EARTHQUAKE[J];CRUSTAL DEFORMATION AND EARTHQUAKE;1999-04
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved