Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《China Earthquake Engineering Journal》 2014-03
Add to Favorite Get Latest Update

Focal Mechanism of Small and Moderate Earthquakes and Tectonic Stress Field in Sichuan- Yunan Areas

GUO Xiang-yun;CHEN Xue-zhong;WANG Sheng-wen;WANG Heng-xin;Institute of Geophysics,CEA;First Monitoring Center,CEA;  
Seismic activity is the direct reflection of tectonic stress fields. Under a regional stress field,the cumulative strain reaches a certain level before the crustal rock fractures and is dislocated,resulting in an earthquake. The accumulation of tectonic stress follows the temporal variation and spatial migration of the stress field. The study of stress field trends in wide regions may determine the epicenters of future large earthquakes to provide a scientific foundation for the physical meaning of earthquake prediction. Current research methods of tectonic stress fields mainly include geological structure analysis,seismic analysis,insitu stress measurement,numerical simulation,and experimental simulation. The most direct method for reflecting the stress state of the crust is to examine the focal mechanism of earthquakes in the deep crust.Compared with strong earthquakes of lesser quantity and concentrated distribution,small and moderate earthquakes are numerous and widespread; these conditions provide the possibility of detecting the stress state of the crust in the study area. Some of the most intense seismic activities in China have occurred in Sichuan- Yunnan,located in the southeastern region of the Tibetan Plateau. Several large earthquakes have occurred in this area during the past 30 years,and its unique tectonic environment has a specific meaning in the dynamics of the continent. In this paper,we calculate the focal mechanism of 1893 M≥3.0 small to moderate earthquakes that occurred from 2003 to 2012 by using the Hash method on the basis of P-wave first motion and S-wave amplitude ratios,and we analyze their characteristics. Moreover,we investigate the focal mechanisms of moderate and strong shocks occurring from 1976 to 2012. The regional stress field is inverted by using the spatial and temporal stress inversion( SATSI) method for damping regional stress with 1651 reliable focal mechanism solutions,and its space characteristics are analyzed. Our research shows that the focal mechanism solutions of small and moderate M≥3. 0 earthquakes were dominated by strike slip from 2003 to 2012 in the Sichuan- Yunnan region,with some reverse and normal faulting M≥4. 0 earthquakes were dominated by strike slip,which is consistent with the regional background. The fault type is indicative of 3. 0 ≤M ≤3. 9 random earthquakes. The Sichuan- Yunnan area is divided into five zones of A,B,C,D,and E according to geological and seismic activity and other characteristics to examine the characteristics of the focal mechanism in detail. The results show that characteristics differ among zones. The stress action is mainly horizontal,and strike-slip faulting is dominant in the study area. The maximum horizontal principal stress orientation of the tow side of the Hong-he fault tail is NW-SE. In the Sichuan- Yunnan area,the rhombic block stress is divided into two different states by the Lijiang- Xiaojinhe fault; the stress orientation of the south region is NW-SE,and that of the north region is N-S. The stress orientation has a rotating clockwise tendency from inner the Tibetan Plateau to the east border of the Sichuan- Yunnan rhombic block. In the eastern boundary area,there is a gradual transition from NE to SW in the north to NW-SE in south. The maximum horizontal principal stress orientation is parallel to the fault orientation in western and southwestern Yunnan. We compared our results with the Harvard Centroid Moment Tensor( CMT) database and determined that our results are comparatively accurate.
【Fund】: 中国地震局地球物理研究所基本科研重大专项(DQJB11C11);; 中国地震局行业专项(201208009)
【CateGory Index】: P315.33
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
【Citations】
Chinese Journal Full-text Database 10 Hits
1 KAN RONG-JU ZHANG SI-CHANG YAN FENG-TONG YU LIN-SHENG(The Seismological Brigade of Kunming, National Seismological Bureau);PRESENT TECTONIC STRESS FIELD AND ITS RELATION TO THE CHARACTERISTICS OF RECENT TECTONIC ACTIVITY IN SOUTHWESTERN CHINA[J];Chinese Journal of Sinica;1977-02
2 XU ZHONG-HUAI WANG SU-YUN HUANG YU-RUI GAO A-JIA JIN XIAO-FENGCHANG XIANG-DONG(Institute of Geophysics, State Seismological Bureau, Beijing);DIRECTIONS OF MEAN STRESS AXES IN SOUTHWESTERN CHINA DEDUCED FROM MICROEARTHQUAKE DATA[J];Chinese Journal of Geophysics;1987-05
3 XIE Fu-Ren CUI Xiao-Feng ZHAO Jian-Tao CHEN Qun-Ce LI Hong Institute of Crustal Dynamics, China Earthquake Administration, Beijing 100085, China;REGIONAL DIVISION OF THE RECENT TECTONIC STRESS FIELD IN CHINA AND ADJACENT AREAS[J];Chinese Journal of Geophysics;2004-04
4 CHANG Li-Jun,WANG Chun-Yong,DING Zhi-FengInstitute of Geophysics, China Earthquake Administration, Beijing 100081, China;A study on SKS splitting beneath the Yunnan region[J];Chinese Journal of Geophysics;2006-01
5 Kan Rongju, Wang Shaojin, Huang Kung and Sung Wen(Yunnan Seismological Bureau);MODERN TECTONIC STRESS FIELD AND RELATIVE MOTION OF INTRAPLATE BLOCK IN SOUTHWESTERN CHINA[J];Seismology and Geology;1983-02
6 WANG Sheng zu ZHANG Liu (Institute of Geology & Laboratory of Tectonophysics, China Seismological Bureau, Beijing 100029, China);TECTONIC STRESS FIELD AND SEISMIC TECTONICS CONTROLLED BY PLASTIC-FLOW NETWORK IN THE SICHUAN-YUNNAN RHOMBIC BLOCK AND ITS ADJACENT AREAS[J];Seismology and Geology;2002-03
7 CHENG Wan-zheng 1) DIAO Gui-ling 2) LAU¨G Yi-pei 1) ZHANG Yong-Jiu 1) LI Gui-fang 1) CHEN Tian-chang 1) 1) Seismological Bureau of Sichuan Province, Chengdu 610041, China 2) Seismological Bureau of Hebei Province, Shijiazhuang 050021, China;FOCAL MECHANISMS, DISPLACEMENT RATE AND MODE OF MOTION OF THE SICHUAN-YUNNAN BLOCK[J];Seismology and Geology;2003-01
8 QIAN Xiao-dong QIN Jia-zheng LIU Li-fang (Earthquakes Administration of Yunnan Province,Kunming 650224,China);STUDY ON RECENT TECTONIC STRESS FIELD IN YUNNAN REGION[J];Seismology and Geology;2011-01
9 Xie Furen Su Gang Cui Xiaofeng Shu Saibing Zhao Jiantao (Institute of Crustal Dynamics, China Seismological Bureau, Beijing 100085, China);MODERN TECTONIC STRESS FIELD IN SOUTHWESTERN YUNNAN, CHINA[J];Acta Seismologica Sinica;2001-01
10 Wu Jianping Ming Yuehong Wang Chunyong (Institute of Geophysics, China Earthquake Administration, Beijing, 100081);SOURCE MECHANISM OF SMALL-TO-MODERATE EARTHQUAKES AND TECTONIC STRESS FIELD IN YUNNAN PROVINCE[J];Acta Seismologica Sinica;2004-05
【Co-citations】
Chinese Journal Full-text Database 10 Hits
1 ZHU Shoubiao 1) SHI Yaolin 2) ( 1)Department of geophysics, School of Earth and Space Sciences, Peking University, Beijing, 100871; 2) Key lab of calculation geodynamics, Graduate School, Chinese Academy of Sciences, Beijing, 100039);Genetic Algorithm-Finite Element Inversion of Topographic Spreading Forces and Drag Forces of Lower Crust to Upper Crust in Tibetan Plateau[J];Acta Scicentiarum Naturalum Universitis Pekinesis;2005-02
2 CUI Xiaofeng1,,HU Xingping1,YU Chunquan2,TAO Kai2,WANG Yanhua1,NING Jieyuan2 1.Institute of Crustal Dynamics,China Earthquake Administration,Beijing 100085;2.School of Earth and Space Sciences,Peking University,Beijing 100871;Research on Focal Mechanism Solutions of Wenchuan Earthquake Sequence[J];Acta Scientiarum Naturalium Universitatis Pekinensis;2011-06
3 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
4 TANG Wen-qing~(1,2),LIU Yu-ping~2,CHEN Zhi-liang~2,ZHANG Qing-zhi~2,ZHAO Ji-xiang~2,B.C.BURCHFIEL~3,R.W.KING~31.Southwest Jiaotong University,Chengdu 610031, China;2.Chengdu Institute of Geology and Mineral Resources,Chengdu 610082,China;3.Massachusetts Institute of Technology,Massachusetts Cambridge 02139,USA;Present-day motion characteristics of blocks in the east of the Qinghai-Tibet plateau and adjacent areas[J];Journal of Chengdu University of Technology(Science & Technology Edition);2008-01
5 ZHANG Rong-dou①,HUANG Ding-fa①,LIAO Hua②,ZHOU Le-tao①,ZHAO You-bing①(① Dept of Surveying Engineering,School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;② Institute of Disaster Relief,Sichuan Seismological Bureau,Chengdu 610014,China);The analysis of present-day crustal deformation in Sichuan based on GPS[J];Science of Surveying and Mapping;2008-06
6 Chen Yinhao;Formation Stress Interpretation Method from Dipmeter Logs[J];Well Logging Technology;1988-02
7 ZHOU Chun-hua,YIN Jian-min,LIU Yuan-kun,GUO Xi-feng(Key Laboratory of Geotechnical Mechanics and Engineering of the Ministry of Water Resources,Yangtze River Scientific Research Institute,Wuhan 430010,China);Geostress Measurement and Evaluation for Ahai Hydro-power Station's Dam Site[J];Journal of Yangtze River Scientific Research Institute;2007-03
8 ZHAO Qi-guang,LOU Hai,WANG Chun-yong(Institute of Geophysics,China Earthquake Administration,Beijing 100081,China);Teleseismic Tomography of Deep Velocity Structure in the Eastern Edge of Tibetan Plateau[J];CT Theory and Applications;2011-03
9 Rao Lixun;Wang Jin;Li Yarong Seismological Institute of Lanzhou, 73000 Lanzhou;CRUST STRESS IN NORTHEASTERN REGION OF CHINA[J];Seismological Research of Northeast China;1992-02
10 YAO Rui1,YANG Shuxin1,ZHOU Jun2,MI Qi3(1.Institute of Crustal Dynamics,CEA,Beijing 100085,China;2.Northwest Investigation,Design and Research Institute,Xi'an 710065,China;3.College of Earth Science,GUCAS,Beijing 100049,China);Modeling of in-situ stress field in a hydropower station and stability analysis of its project region[J];Journal of Earthquake Engineering and Engineering Vibration;2011-02
China Proceedings of conference Full-text Database 10 Hits
1 WU Jmg~1,WANG Hui~(2*),CAO Jian-Ling~2,GAO Yuan~2,WANG Qiong~2 1 Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China 2 Institute of Earthquake Science,China Earthquake Administration,Beijing 100036,China;Influence of crustal inhomogeneity on seismicity in North China[A];[C];2012
2 WANG Ruo~1.WANG Miao-Yue~1.DI Qing-Yun~1.WANG Guang-Jie~1,ZHOU Jian-Xin~2 1 Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029.China 2 China Aero Geophysical Survey & Remote Sensing Center for Land and Resources,Beijing 100083,China;The geology structure imaging by aero-magnetic data inversion at the Southeast margin of Bayankela Block[A];[C];2008
3 Huang Jiqing;AN ATTEMPT TO THE SEISMOGEOLOGICAL REGIONALIZATION OF CHINA ACCORDING TO THE TECTONIC POINT OF VIEW[A];[C];1979
4 Ke Chengxi;NAPPE TECTONICS AND EXTRUSION TECTONICS——THE PRINCIPLE EFFECTS OF THE COLLISION WITHIN THE PLATE(TAKING THE EAST OF THE QINGHAI—XIZANG PLATEAU FOR AN EXAMPLF)[A];[C];1987
5 WANG Miao-yue(Institute of Geology and Geophysics, Chinese academy of Sciences,Beijing,100029,China);Interior Geometric and Physical Structure Imaging of Solid Earth[A];[C];2007
6 Fan Taoyuan;The Present Active Tectonic Framework of China and the Spherical Shell FE Analysis of Crust Tectonic Stress Field[A];[C];2009
7 Xingping Hu Xiaofeng Cui Lianwang Chen Jiaji Luo;Effect of Tectonic Deformation Pattern in Longmenshan Region on Wenchuan Earthquake Sequence[A];[C];2011
8 Wang Xianbin (State Key Laboratory of Gas Geochemistry,Lanzhou Institute of Geology, Chinese Academy of Science,Lanzhou,730000);THE STUDY ON DEEP GAS GEOCHEMISTRY[A];[C];1998
9 ;Feasible Analysis of Engineering Geological Condition for Underground Storage in Jinzhou[A];[C];2006
10 CUI Xiaofeng~1,XIE Furen~1,LI Ruisha~2,ZHANG Hongyan~1 (1.Institute of Crustal Dynamics,China Earthquake Administration,Beijing 100085,China;2.Second Crust Monitoring And Application Center,China Earthquake Administration,Xi'an,Shaanxi 710054,China);HETEROGENEOUS FEATURES OF STATE OF TECTONIC STRESS FILED IN NORTH CHINA AND DEEP STRESS IN COAL MINE[A];[C];2010
【Secondary Citations】
Chinese Journal Full-text Database 10 Hits
1 ZHU Junjiang, ZHAN Wenhuan, QIU Xuelin, XU Huilong and TANG Cheng (Key Laboratory of Marginal Sea Geology South China Sea Institute of Oceanology & Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, GD 510301, China);EARTHQUAKE FOCAL MECHANISM AND ITS TECTONIC SIGNIFICANCE ALONG THE TWO SIDES OF THE RED RIVER FAULT ZONE[J];Geotectonica Et Metallogenia;2004-03
2 CUI Jun-wen, ZHANG Xiao-wei, TANG Zhe-min (Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China);Tectonic divisions of the Qinghai-Tibet Plateau and structural characteristics of deformation on their boundaries[J];Geology in China;2006-02
3 XU Ji-ren, ZHAO Zhi-xin (Key Laboratory for Continental Dynamics of the Ministry of Land and Resources of China, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China);Characteristics of the regional stress field and tectonic movement on the Qinghai-Tibet Plateau and in its surrounding areas[J];Geology in China;2006-02
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 Han Jian Zhou Shuoyu Song Yonghou Zhang Rongfu (Institute of Seismology, State Seismological Bureau);THE CHARACTERISTICS OF SEGMENTATION AND THE VIEWPOINT OF SEISMOGENESIS OF STRUCTURE NETWORK IN THE HONGHE FAULT ZONE[J];Crustal Deformation and Earthquake;1990-02
6 Xiong Xiong 1,2) Xu Houze 1) Teng Jiwen 2) 1)Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077 2)Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100101;INVESTIGATION ON LITHOSPHERIC MECHANICAL BACKG-ROUND OF EASTWARD MASS FLOW OF TIBETAN PLATEAU[J];Crustal Deformation and Earthquake;2001-02
7 MA Wen-tao1,XU Xi-wei1,XU Ping2,YU Gui-hua1(1. Institute of Geology, China Seismological Bureau, Beijing 100029,China;2. Beijing Seismological Bureau, Beijing 100080,China);The method of triangle seismic classify and analysis on the seismic cause in the northern China[J];Progress In Geophysics;2004-02
8 SHU SHUI;THE CHARACTERISTICS OF LUHUO (炉霍)EARTHQUAKE (M=7.9) AND THE SEISMICITY OF THIS REGION[J];Chinese Journal of Sinica;1974-02
9 CHEN PEI-SHAN YEN SHOU-MIN (Institute of Geophysics, Academia Sinica);RELATION BETWEEN THE SEISMIC SOURCE MECHANISM AND THE INTENSITY DISTRIBUTION[J];Chinese Journal of Sinica;1975-01
10 TANG BONG-CHANG, WEN DE-HUA, , DENG TIAN-GANG, HUANG SHENG-MU (The Seismological Brigade of Chengdu, National Seismological Bureau);A PRELIMINARY STUDY ON THE CHARACTERISTICS OF THE GROUND FRACTURES DURING THE LU-HUO (炉霍) M=7.9 EARTHQUAKE, 1973 AND THE ORIGIN OF THE EARTHQUAKE[J];Chinese Journal of Sinica;1976-01
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved