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《Chinese Journal of Geophysics》 2015-02
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Error analysis for focal mechanisms from CAP method inversion:An example of 2 moderate earthquakes in Jiaodong Peninsula

ZHENG Jian-Chang;LIN Mei;WANG Peng;XU Chang-Peng;Earthquake Administration of Shandong Province;  
As an effective focal mechanism inversion method for regional earthquakes,CAP(Cut and Paste)is widely used in China in recent years.Its quality and error level need to be evaluated for such solutions are increasingly retrieved.On the other hand,when using the CAP method,those phases which fitted well are usually chosen for inversion,and the other phases which are thought‘bad'or fitted not so good are ignored.It has been found that different station combinations will lead to varied results with unneglectable discrepancies.Objectively speaking,in a scientific perspective,this artificially selected process will increase uncertainties in final inversion results,especially under the present instrument status in China.Furthermore,because the grid search scheme used in the CAP method which is not evenly distributed on focal sphere,we can not give a convincing proof to illustrate that whether the cause of badly-fitted waveforms comes from data error or from un-sufficient searched solutions.Two earthquakes of M4.6and M4.3occurred in Shandong Peninsula on 23 November 2013and 7January 2014,respectively.The former is the largest event in the Shandong area since1995.For convenience,we label the former event as the Laizhou earthquake,and the latter as the Rushan earthquake,according to their epicenters.Taking these two events for example,this paper discusses error estimation for focal mechanism inversion using the CAP method.The paper also presents an uncertainty analysis process for the inversion results.Briefly,a bootstrap technique is adopted,waveforms are randomly sampled with equal probability from origin dataset,and then used as data for a repeating inversion procedure.After a large number of inversions,e.g.,1000 times,we finally get bootstrap results consisting of 1000 focal mechanisms.Based on these focal mechanisms,we conduct the following work.(1)We employ a PSO(particle swarm optimization)algorithm to search a solution,of which the Kagan angle is minimal to all the double couple models,and use its standard deviation as the inversion results uncertainty range.The uncertainty of solutions for the Laizhou event is±23.7°;for Rushan event,is ±6.4°.These two solutions can be evaluated as ‘A'level according to the Hardebeck′s indicator of mechanisms quality.(2)A clustering analysis is used for bootstrap results.For the Rushan event,the clustering center is coincident to the PSO optimized solution;for the Laizhou event,several centers are found in clustering,despite isolate solutions.There are two clustering centers,of which the corresponding data proportion is about 98.7percent.(3)Projecting P and T axes of bootstrap results onto a focal sphere,calculating its probability density,we get the probability density distribution of focal mechanisms on the focal sphere.Then we can give the confidence interval on different levels for mechanism solutions.The method demonstrated in this paper is not confined to achieving more accurate focal mechanism and obtaining rational inversion error,while it can also be used to exclude isolate and incorrect solutions effectively,and avoid the effect of data from stations with larger disturbances.Therefore,this method can be used to invert focal mechanisms automatically immediately after moderate earthquakes occur.Sustaining by powerful computational capabilities,we can get more accurate and reliable focal mechanism results without manual work.
【Fund】: 国家科技支撑计划项目(2012BAK19B04-01-05);; 山东省自然科学基金(ZR2012DQ006);; 中国地震局监测预报司震情跟踪工作专项(2014020103)资助
【CateGory Index】: P315.33
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【Citations】
Chinese Journal Full-text Database 10 Hits
1 LV Jian~ 1,2 ,ZHENG Yong~ 3,1 ,NI Si-Dao~1,GAO Jian-Hua~21 University of Science and Technology of China, Hefei 230026,China2 Earthquake Administration of Jiangxi Province,Nanchang 330039,China3 Institute of Geophysics, Chinese Earthquake Adimistration, Beijing 100081,China;Focal mechanisms and seismogenic structures of the M_s5.7 and M_s4.8 Jiujiang-Ruichang earthquakes of Nov. 26, 2005[J];Chinese Journal of Geophysics;2008-01
2 HUANG Jian-Ping1,NI Si-Dao1,FU Rong-Shan1,NIU Feng-Lin2,SHAO Zhi-Gang3,ZHENG Yong4 1 School of Earth and Space Sciences,Mengcheng National Geophysical Observatory,University of Science and Technology of China,Hefei 230026,China2 Department of Earth Science,Rice University,Houston,TX,770053 Institute of Earthquake Science,China Earthquake Administration,Beijing 100036,China4 Institute of Geophysics,China Earthquake Administration,Beijing 100081,China;Source mechanism of the 2006 M_w5.1 Wen'an Earthquake determined from a joint inversion of local and teleseismic broadband waveform data[J];Chinese Journal of Geophysics;2009-01
3 YU Chun-Quan~1,TAO Kai~1,CUI Xiao-Feng~2,HU Xing-Ping~2,NING Jie-Yuan~(1*)1 Key Laboratory of Orogenic Belts and Crustal Evolution,Ministry of Education,School of Earth and Space SciencesPeking University,Beijing 100871,China2 Institute of Crustal Dynamics,China Earthquake Administration,Beijing 100085,China;P-wave first-motion focal mechanism solutions and their quality evaluation[J];Chinese Journal of Geophysics;2009-05
4 LONG Feng ~(1,3) , ZHANG Yong-Jiu~(3*) , WEN Xue-Ze~(2,3),NI Si-Dao~1 , ZHANG Zhi-Wei~3 1 School of Earth and Space, University of Science and Technology of China , Hefei 230026, China 2 Institute of Earthquake Science, China Earthquake Administration , Beijing 100036, China 3 Earthquake Administration of Sichuan Province, Chengdu 610041, China;Focal mechanism solutions of M_L≥4.0 events in the M_S6.1 Panzhihua-Huili earthquake sequence of Aug 30, 2008[J];Chinese Journal of Geophysics;2010-12
5 Xu Xiangtong; Xu Zhonghuai; Zhang Dongning(Institute of Geophysics, State Seismological Bureau,Beijing 100081,China);A probabilistic grid test method of determining earthquake focal mechanisms using P-wave onset polarity data[J];SEISMOLOGICAL AND GEOMANGNETIC OBSERVATION AND RESEARCH;1995-04
6 Zheng Jianchang1,2),Chen Yun-tai1) 1) Institute of Geophysics,China Earthquake Administration,Beijing 100081,China 2) Earthquake Administration of Shandong Province,Jinan 250014,China;Stability of sparse station data inversion for deviatoric moment tensor solution of regional earthquakes[J];Acta Seismologica Sinica;2012-01
7 Han Libo Jiang Changsheng (Institute of Geophysics,China Earthquake Administration,Beijing100081,China);Focal mechanism inversion of 8Jun 2011Toksun M_S5.3earthquake[J];Acta Seismologica Sinica;2012-03
8 HAN Li-Bo 1,JIANG Chang-Sheng1,BAO Feng 2,3 1 Institute of Geophysics,China Earthquake Administration,Beijing 100081,China 2 School of Earth and Space Science,University of Science and Technology of China,Hefei 230026,China 3 Geodetic Survey and Geodynamics National Key Lab,Institute of Geodesy and Geophysics, China Earthquake Administration,Wuhan 430077,China;Source parameter determination of 2010 Taikang M_S4.6 earthquake sequences[J];Chinese Journal of Geophysics;2012-09
9 ZHENG Yong1,2,MA HongSheng3,Lü Jian4,NI SiDao5,LI YingChun6 & WEI ShengJi2 1 Institute of Geodesy and Geophysics,Chinese Academy of Sciences,Wuhan 430077,China; 2 Institute of Geophysics,Chinese Earthquake Administration,Beijing 100086,China; 3 Institute of Earthquake Science,Chinese Earthquake Administration,Beijing 100086,China; 4 Earthquake Administration of Jiangxi Province,Nanchang 330039,China; 5 School of Earth and Space Science,University of Science and Technology of China,Hefei 230026,China; 6 Earthquake Administration of Jiangsu Province,Nanjing 210014,China;Source mechanism of strong aftershocks (M_s≥5.6) of the 2008/05/12 Wenchuan earthquake and the implication for seismotectonics[J];中国科学(D辑:地球科学)(英文版);2009-06
10 Diao Gulling Yu Limin Li Qinzu(Seismological Bureau of Hebei Province);Hierarchical Clustgering Analysis of the Focal Mechanism Solution ——Taking the Haicheng Earthquake Sequences for Example[J];Earthquake Research In China;1992-03
【Co-citations】
Chinese Journal Full-text Database 10 Hits
1 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
2 ZHAO Ling-yun1, DENG Jin2, CHEN Jun-hua1, SHEN Xue-lin1, DAI Miao1,WEI Gui-chun1(1.Earthquake Administration of Hubei Province, Wuhan 430071, China;2. Earthquake Administration of Gansu Province, Lanzhou 730000 ,China);Study on Source Mechanism of Ms 4.1 and Ms 3.2 Earthquakes in Hubei-Zigui with CAP Method[J];Journal of Yangtze River Scientific Research Institute;2010-05
3 Zhang Hong-zhi~1,Diao Gui-ling~2,Zhao Ying-ping~2,Su Zhong-nan~3,Sun Jing-hua~1,Shi Su-hua~2,Du Ying-chun~2(1.Institute of Geophysics,CEA,Beijing 100081;2.Earthquake Administrition of Hebei Province,Shijiazhuang 050021;3.Earthquake Administrition of Inner Mongolia Autonomous Region,Huhhot 010051);THE FOCAL MECHANISMS OF EARTHQUAKES BEFORE AND AFTER ZHANGBEI MAIN EVENT IN THE AREA[J];Seismological Research of Northeast China;2004-03
4 Diao Gulling(Seismological Bureau of Tianjin)Yu Limin Li Qinzu(Seismological Bureau of Hebei Province);COMPARISON AND ANALYSIS OF THE SOURCE STRESS FIELD INFERRED FROM SEQUENCE OF TWO EARTHQUAKES M_s 5.8 IN DATONG[J];Earthquake;1995-04
5 LONG Hai-ying,GAO Guo-ying,NIE Xiao-hong,LI Yin-zhen(Earthquake Administration of Xinjiang Uygur Autonomous Region,Urumqi 830011,China);Focal mechanism solution of small and moderate earthqu akes and structural stress field in Urumqi area[J];Earthquake;2007-03
6 LONG Hai-ying,GAO Guo-ying,NIE Xiao-hong,LI Yin-zhen,SHEN Jun(Earthquake Administration of Xinjiang Uygur Autonomous Region,Urumqi 830011,China);The focal mechanism solution and stress field inversion of small and moderate earthquakes along middleeastern part of northern Tianshan Reion[J];Earthquake;2008-01
7 XUE Yan1,2,ZHOU Long-quan2,MA Hong-sheng3,LIU Jie2(1.Institute of Geophysics,CEA,Beijing 100081,China;2.China Earthquake Networks Center,Beijing 100045,China;3.Institute of Earthquake Science,CEA,Beijing 100036,China);Characteristics of Seismic Activity in 3-D Space before Wen′an earthquake,Hebei Province by Small Earthquake Relocation in the Capital Area of China[J];Earthquake;2010-01
8 GUO Xiang-yun,CHEN Xue-zhong,LI Yan-e(Institute of Geophysics,CEA,Beijing 100081,China);Focal Mechanism Solutions for the 2008 MS8.0 Wenchuan Earthquake and Part of its Aftershocks[J];Earthquake;2010-01
9 ZHAO Bo,SHI Yu-tao,GAO Yuan(Institute of Earthquake Science,CEA,Beijing 100036,China);Relocation of the Wenchuan M_S8.0 Earthquake Sequence[J];Earthquake;2011-02
10 Zhang Hongzhi1),Diao Guiling2),Zhao Yingping2),Wang Chengliang3),Zhang Xiao4),Li Guang4)and Ma Lijun2)(1)Institute of Geophysics,CEA,Beijing 1000812)Earthquake Administration of Hebei Province,Shijiazhuang 0500213)Earthquake Administration of Handan City,Handan 0560144)Earthquake Administration of Tangshan City,Tangshan 063000);RECENT FOCAL MECHANISM IN XINGTAI REGION[J];Journal of Geodesy and Geodynamics;2007-06
China Proceedings of conference Full-text Database 3 Hits
1 CHEN YUN-TAI WU ZHONG-LIANG LI SHI-YU (Institute of Geophysics, State Seismological Bureau, Beijing 100081, China);RESEARCH IN PHYSICS OF EARTHQUAKE SOURCE IN CHINA IN THE TURN OF THE CENTURIES[A];[C];1997
2 Yong Zheng Zujun Xie Rongjiang Wang Sidao Ni Xiong Xiong Can Ge GeoForschungsZentrum Potsdam(GFZ),Potsdam,Germany;;Effects of crustal variation on the focal mechanism inversion and relocation of the Wenchuan aftershocks[A];[C];2009
3 Zujun Xie Yong Zheng;Focal mechanisms of the southern aftershock swarm of Wenchuan Ms8.0 earthquakeand the seismotectonic implications[A];[C];2009
【Secondary Citations】
Chinese Journal Full-text Database 10 Hits
1 Song Hongbiao;THE COMPREHENSIVE INTERPRETATION OF GEOLOGICAL AND GEOPHYSICAL DATA IN THE OROGENIC BELT OF LONGMEN MOUNTAINS, CHINA[J];JOURNAL OF CHENGDU UNIVERSITY OF TECHNOLOGY;1994-02
2 ZHOU Cuiying,HUA Aijun,JIANG Haikun,DONG Xuguang,WU Yanhe,ZHANG Ling,HOU Haifieng(Seismological Bureau of Shandong province,Shandong Jinan 250014);FOCAL MECHANISM SOLUTIONS OBTAINED BY GRIDPOINTS TEST METHOD FOR CONTEMPORARY MODERATEAND SMALL EARTHQUAKES IN SHANDONG AREA[J];Seismological Research of Northeast China;2003-01
3 YANG Guo hua, HAN Yue ping,XIE Jue min,ZHOU Xiao yan (The First Crustal Deformation Monitoring Center,Tianjin 300180,China);The crustal vertical deformation and the action of future strong earthquake in Capital Circle Area[J];Earthquake;2002-03
4 LAN Cong-xin, WANG Chun-yuan, YUE Hui (Seismological Bureau of Beijing Municipality, Beijing 100080, China);Small earthquake band suggested the moderate earthquake occurrence in Capital Circle Region in 2001[J];Earthquake;2003-02
5 ZHANG Ai-ping1,2,NI Si-dao1,2,YANG Xiao-yong2 (1.Mengcheng National Geophysical Observatory, Mengcheng 233500; 2.School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China);Source parameters of 2004-03-24 Xilin Gol League earthquake[J];Earthquake;2008-03
6 Wang Dun1),Xiao Heping2),Yao Yunsheng1),Song Chen1) and Li Heng1)1)Institute of Seismology,CEA,Wuhan 430071 2)Earthquake Administration of Hunan Province,Changsha 410004;ON SEISMOGENIC AND ITS BACKGROUND TECTONICS OF JIUJIANG-RUICHANG SEISMIC SEQUENCE[J];Journal of Geodesy and Geodynamics;2007-S1
7 Lü Xinbiao Yao Shuzhen Zhou Zonggui (Faculty of Earth Resources, China University of Geosciences, Wuhan430074);CHARACTER OF THE LOCAL GEOLOGICAL ANOMALY AND MINERALIZATION IN DAYE-JIURUI REGION[J];;1998-02
8 LI Zhi-Wei,XU Yi,HAO Tian-Yao,LIU Jing-Song(Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China);Inversion of P-wave velocity structure of lithosphere in the Ryukyu-Taiwan-Luzon area by nonlinear algorithm[J];Progress in Geophysics;2007-05
9 GU HAO-DING CHEN YUN-TAI(The Seismological Bureau of Liaoning Province) (Institute of Geophysics, Aeademia Sinica)GAO XIANG-LIN ZHAO Yi(The Seismological Brigade of the Ningxia (The Seismological Brigade of Guangzhou, Hui Nationality Autonomous Region) National Seismological Bureau);FOCAL MECHANISM OF HAICHENG , LIAONING PROVINCE, EARTHQUAKE OF FEBRUARY 4, 1975[J];Chinese Journal of Sinica;1976-04
10 LIANG SHANG-HONG SHU PEI-YI LI YOU-MING ZHU PET-DING ZHANG LI-MIN(Institute of Geophysics, Academia Sinica, Beijing);EARTHQUAKE DISTRIBUTIONS AND THE CHARACTERISTICS OF TECTONIC STRESS FIELD IN PANXI REGION, SOUTHWEST CHINA[J];Chinese Journal of Geophysics;1986-06
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