2012年新疆新源M_s6.6级地震震源参数精确确定
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摘要
基于新疆地震台网的宽频带近震数据和GSN台网的宽频带远震波形数据,对2012年6月30日新疆新源MS6.6级地震,利用CAP方法分别进行近震、远震单独反演以及联合反演,得出此次地震的矩震级为6.3,震源深度为19km,震源断层面解为:节面I:293°/62°/152°,节面II:37°/66°/30°.为确定发震断层面,使用了hypoDD方法对MS≥2的余震序列进行重新定位,得到了余震序列空间分布,发现余震序列呈现出北西西走向,从而推断节面I可能为此次地震的物理破裂面.此次地震可能是天山地区南北向的挤压导致北西西向右旋逆冲走滑的喀什河断裂发生错动而引起的.
With broadband localseismic data from Xinjiang seismologic network and broadband teleseismic data from GSN seismologic network,we inverted focal mechanisms of Xinyuan MS 6.6 earthquake on June 30 th,2012 with "Cut and Paste"(CAP)method(CAPloc、CAPtel、CAPjoint),the result shows that the best double-couple solutions of this MS6.6 event is:293°,62°,152° for strike,dip,rake,respectively.The other nodal plane is 37°,66°,30° with 19 km focal depth and 6.3 moment magnitude.We also relocated earthquake sequences with double-difference location algorithm(HypoDD)to get accurate information of spatial distribution,the result shows that the earthquake sequences showing a NWW trend.So,we concluded that the nodal plane:293°/62°/152° was possible to be the physical fracture surface. The Xinyuan MS 6.6 earthquake is very likely to be caused by the movement of Kashi river fault,a right-lateral thrust strike slip fault,resulting from N-S compressional stress field in Tishan region.
With broadband localseismic data from Xinjiang seismologic network and broadband teleseismic data from GSN seismologic network,we inverted focal mechanisms of Xinyuan MS 6.6 earthquake on June 30 th,2012 with "Cut and Paste"(CAP)method(CAPloc、CAPtel、CAPjoint),the result shows that the best double-couple solutions of this MS6.6 event is:293°,62°,152° for strike,dip,rake,respectively.The other nodal plane is 37°,66°,30° with 19 km focal depth and 6.3 moment magnitude.We also relocated earthquake sequences with double-difference location algorithm(HypoDD)to get accurate information of spatial distribution,the result shows that the earthquake sequences showing a NWW trend.So,we concluded that the nodal plane:293°/62°/152° was possible to be the physical fracture surface. The Xinyuan MS 6.6 earthquake is very likely to be caused by the movement of Kashi river fault,a right-lateral thrust strike slip fault,resulting from N-S compressional stress field in Tishan region.
引文
Bao F,Ni S D,Wang Z J,et al.2011.Overlap of the rupture zonesof 2003Dayao two strong earthquakes[J].Acta SeismologicaSinica(in Chinese),33(3):279-291.
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Bock G,Grünthal G,Wylegalla K.1996.The 1985/86 WesternBohemia earthquakes:Modelling source parameters withsynthetic seismograms[J].Tectonophysics,261(1-3):139-146.
Chen J B.2008.Research on Seismotectonic Features in Xinjiang[D].Lanzhou:Lanzhou Institute of Seismology,44-77.
Chen P,Jordan T H,Zhao L.2005.Finite-moment tensor of the 3September 2002Yorba Linda earthquake[J].Bull.Seism.Soc.Amer.,95(3):1170-1180.
Chen W W,Ni S D,Wang Z J,et al.2012.Joint inversion withboth local and teleseismic waveforms for source parameters ofthe 2010Kaohsiung earthquake[J].Chinese J.Geophys.(inChinese),55(7):2319-2328.
Chong J J,Ni S D,Zeng X F,et al.2010.sPL,an effective seismicphase for determining focal depth at near distance[J].ChineseJ.Geophys.(in Chinese),53(11):2620-2630.
Engdahl E R,van der Hilst R,Buland R.1998.Global teleseismicearthquake relocation with improved travel times and proceduresfor depth determination[J].Bull.Seism.Soc.Amer.,88(3):722-743.
Fang M S,Du A L,Dong X P,et al.1995.Determination of focaldepth with the sPn phase[J].Seismol.Geomag.Obser.Res.(in Chinese),16(5):13-18.
Gao L X,Liu F,Zhao M S,et al.2007.Primary analysis on theseismic source depth determination using sPn phase and itsapplication[J].Northwestern Seismological Journal(inChinese),29(3):213-217.
Han L B,Jiang C S,Bao F.2012.Source parameter determinationof 2010Taikang M(s)4.6earthquake sequences[J].Chinese J.Geophys.(in Chinese),55(9):2973-2981.
Hu X P,Yu C Q,Tao K,et al.2008.Focal mechanism solutions ofWenchuan earthquake and its strong aftershocks obtained frominitial P wave polarity analysis[J].Chinese J.Geophys.(inChinese),51(6):1711-1718.
Huang Y,Yang J S,Zhang T Z.2006.Relocation of the BachuJiashi,Xinjiang earthquake sequence in 2003using the doubledifference location algorithm[J].Chinese J.Geophys.(inChinese),49(1):162-169.
Kanamori H,Given J W.1981.Use of long-period surface waves forrapid determination of earthquake-source parameters[J].Phys.Earth Planet.Inter.,27(1):8-31.
Li X,Liu W X,Jin P.2011.Group velocity distribution of Rayleighwave and Shear wave velocity structure of the crust and uppermantle in Xinjiang,China and its adjacent area(in Chinese)[C].Proceeding of the 27th annual meeting of the Chinesegeophysical socity,394.
Liu Q X,Yang Z X,Xin H L,et al.2012.Relocation of Yushu MS7.1 Earthquake Aftershocks and Discussion on SeismogenicStructure[J].Chinese J.Geophys.(in Chinese),55(1):146-154.
Liu Q Y,Polet J,Komatitsch D,et al.2004.Spectral-elementmoment tensor inversions for earthquakes in southern California[J].Bull.Seism.Soc.Amer.,94(5):1748-1761.
Liu W X,Liu G Z,Zhou G,et al.2011.Crustal thickness and Vp/Vs ratio variations of Xinjiang and surrounding regionsconstrained by receiver function stacking[J].Chinese J.Geophys.(in Chinese),54(8):2034-2041.
Saikia C K.2000.A method for path calibration using regional andteleseismic broadband seismograms:Application to the 21 May1997Jabalpur,India earthquake(MW5.8)[J].Curr.Sci.,79(9):1301-1315.
Shan B,Xiong X,Zheng Y,et al.2011.The co-seismic Coulombstress change and expected seismicity rate caused by 14 April2010 MS=7.1 Yushu,China,earthquake[J].Tectonophysics,510(3):345-353.
Shen Z K,Wan Y G,Gan W J,et al.2003.Viscoelastic triggeringamong large earthquakes along the east Kunlun fault system[J].Chinese J.Geophys.(in Chinese),46(6):786-795.
Thio H K,Kanamori H.1995.Moment-tensor inversions for localearthquakes using surface waves recorded at TERRAscope[J].Bull.Seism.Soc.Amer.,85(4):1021-1038.
Uski M,Hyvnen T,Korja A,et al.2003.Focal mechanisms ofthree earthquakes in Finland and their relation to surface faults[J].Tectonophysics,363(1-2):141-157.
Waldhauser F,Ellsworth W L.2000.A double-differenceearthquake location algorithm:Method and application to thenorthern Hayward fault,California[J].Bull.Seism.Soc.Amer.,90(6):1353-1368.
Wallace T C,Helmberger D V,Mellman G R.1981.A techniquefor the inversion of regional data in source parameter studies[J].J.Geophys.Res.,86(B3):1679-1685.
Wan Y G,Shen Z K,Zeng Y H,et al.2007.Evolution ofcumulative Coulomb failure stress in northeastern QinghaiXizang(Tibetan)Plateau and its effect on large earthquakeoccurrence[J].Acta Seismologica Sinica(in Chinese),29(2):115-129.
Wang Z J.2011.Joint study of source parameters of small tomoderate earthquake[master’s thesis](in Chinese).Hefei:University of Science and Technology of China.
Wei S J,Ni S D,Chong J J,et al.2009.The 16 August 2003Chifeng earthquake:Is it a lower crust earthquake[J].ChineseJ.Geophys.(in Chinese),52(1):111-119.
Xu L S,Chen Y T.2005.Temporal and spatial rupture process ofthe great Kunlun Mountain Pass earthquake of November 14,2001from the GDSN long period waveform data[J].Science inChina Series D,48(1):112-122.
Xu Z H,Yan M,Zhao Z H.1983.Evaluation of the direction oftectonic stress in North China from recorded data of a largenumber of small earthquakes[J].Acta Seismologica Sinica(inChinese),5(3):268-279.
Zhang H M,Jin P,Liu W X,et al.2011.The 3-D velocity modelconstruction of Xinjiang and regional earthquake location[C].Proceeding of the 27th Annual Meeting of the ChineseGeophysical Socity,406.
Zhao J M.2005.Lithospheric structure and geodynamics ofTianshan orogenic belt(in Chinese)[M].Beijing:SeismologicalPress,54-58.
Zhao L S,Helmberger D V.1994.Source estimation frombroadband regional seismograms[J].Bull.Seism.Soc.Amer.,84(1):91-104.
Zhou S Y,Xu Z H,Chen X F.2001.Analysis on the sourcecharacteristics of the 1997Jiashi swarm,Western China[J].Chinese J.Geophys.(in Chinese),44(5):654-662.
Zhu A L,Xu X W,Zhou Y S,et al.2005.Relocation of smallearthquakes in western Sichuan,China and its implications foractive tectonics[J].Chinese J.Geophys.(in Chinese),48(3):629-636.
Zhu L P,Helmberger D V.1996.Advancement in source estimationtechniques using broadband regional seismograms[J].Bull.Seism.Soc.Amer.,86(5):1634-1641.
包丰,倪四道,汪贞杰,等.2011.2003年云南大姚两次强震破裂区重叠程度的研究[J].地震学报,33(3):279-291.
陈建波.2008.新疆地震构造特征研究[D].兰州:中国地震局兰州地震研究所,44-77.
陈伟文,倪四道,汪贞杰,等.2012.2010年高雄地震震源参数的近远震波形联合反演[J].地球物理学报,55(7):2319-2328.
崇加军,倪四道,曾祥方,等.2010.sPL,一个近距离确定震源深度的震相[J].地球物理学报,53(11):2620-2630.
房明山,杜安陆,董孝平,等.1995.用sPn震相测定近震震源深度[J].地震地磁观测与研究,16(5):13-18.
高立新,刘芳,赵蒙生,等.2007.用sPn震相计算震源深度的初步分析与应用[J].西北地震学报,29(3):213-217.
国家地震局震害防御司.1995.中国历史强震目录(公元前23世纪——公元1911年)[M].北京:地震出版社,499-500.
韩立波,蒋长胜,包丰.2012.2010年河南太康MS4.6地震序列震源参数的精确确定[J].地球物理学报,55(9):2973-2981.
胡幸平,俞春泉,陶开,等.2008.利用P波初动资料求解汶川地震及其强余震震源机制解[J].地球物理学报,51(6):1711-1718.
黄媛,杨建思,张天中.2006.2003年新疆巴楚-伽师地震序列的双差法重新定位研究[J].地球物理学报,49(1):162-169.
李欣,刘文学,靳平.2011.中国新疆及邻域Rayleigh波群速度分布及地壳上地幔S波速度结构[C].中国地球物理学会第二十七届年会论文集,394.
刘巧霞,杨卓欣,莘海亮,等.2012.玉树MS7.1级地震部分余震重新定位及发震构造分析[J].地球物理学报,55(1):146-154.
刘文学,刘贵忠,周刚,等.2011.新疆和周边地区地壳厚度和Vp/Vs比值变化的接收函数约束[J].地球物理学报,54(8):2034-2041.
沈正康,万永革,甘卫军,等.2003.东昆仑活动断裂带大地震之间的黏弹性应力触发研究[J].地球物理学报,46(6):786-795.
万永革,沈正康,曾跃华,等.2007.青藏高原东北部的库仑应力积累演化对大地震发生的影响[J].地震学报,29(2):115-129.
汪贞杰.2011.中小地震的多联合研究[硕士论文].合肥:中国科学技术大学.
韦生吉,倪四道,崇加军,等.2009.2003年8月16日赤峰地震:一个可能发生在下地壳的地震[J].地球物理学报,52(1):111-119.
许力生,陈运泰.2004.从全球长周期波形资料反演2001年11月14日昆仑山口地震时空破裂过程[J].中国科学:D辑,34(3):256-264.
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朱艾斓,徐锡伟,周永胜,等.2005.川西地区小震重新定位及其活动构造意义[J].地球物理学报,48(3):629-636.
Bent A L,Perry H K C.2002.Depths of eastern Canadianearthquakes from regional data[J].Seism.Res.Lett.,73(2):273-284.
Bock G,Grünthal G,Wylegalla K.1996.The 1985/86 WesternBohemia earthquakes:Modelling source parameters withsynthetic seismograms[J].Tectonophysics,261(1-3):139-146.
Chen J B.2008.Research on Seismotectonic Features in Xinjiang[D].Lanzhou:Lanzhou Institute of Seismology,44-77.
Chen P,Jordan T H,Zhao L.2005.Finite-moment tensor of the 3September 2002Yorba Linda earthquake[J].Bull.Seism.Soc.Amer.,95(3):1170-1180.
Chen W W,Ni S D,Wang Z J,et al.2012.Joint inversion withboth local and teleseismic waveforms for source parameters ofthe 2010Kaohsiung earthquake[J].Chinese J.Geophys.(inChinese),55(7):2319-2328.
Chong J J,Ni S D,Zeng X F,et al.2010.sPL,an effective seismicphase for determining focal depth at near distance[J].ChineseJ.Geophys.(in Chinese),53(11):2620-2630.
Engdahl E R,van der Hilst R,Buland R.1998.Global teleseismicearthquake relocation with improved travel times and proceduresfor depth determination[J].Bull.Seism.Soc.Amer.,88(3):722-743.
Fang M S,Du A L,Dong X P,et al.1995.Determination of focaldepth with the sPn phase[J].Seismol.Geomag.Obser.Res.(in Chinese),16(5):13-18.
Gao L X,Liu F,Zhao M S,et al.2007.Primary analysis on theseismic source depth determination using sPn phase and itsapplication[J].Northwestern Seismological Journal(inChinese),29(3):213-217.
Han L B,Jiang C S,Bao F.2012.Source parameter determinationof 2010Taikang M(s)4.6earthquake sequences[J].Chinese J.Geophys.(in Chinese),55(9):2973-2981.
Hu X P,Yu C Q,Tao K,et al.2008.Focal mechanism solutions ofWenchuan earthquake and its strong aftershocks obtained frominitial P wave polarity analysis[J].Chinese J.Geophys.(inChinese),51(6):1711-1718.
Huang Y,Yang J S,Zhang T Z.2006.Relocation of the BachuJiashi,Xinjiang earthquake sequence in 2003using the doubledifference location algorithm[J].Chinese J.Geophys.(inChinese),49(1):162-169.
Kanamori H,Given J W.1981.Use of long-period surface waves forrapid determination of earthquake-source parameters[J].Phys.Earth Planet.Inter.,27(1):8-31.
Li X,Liu W X,Jin P.2011.Group velocity distribution of Rayleighwave and Shear wave velocity structure of the crust and uppermantle in Xinjiang,China and its adjacent area(in Chinese)[C].Proceeding of the 27th annual meeting of the Chinesegeophysical socity,394.
Liu Q X,Yang Z X,Xin H L,et al.2012.Relocation of Yushu MS7.1 Earthquake Aftershocks and Discussion on SeismogenicStructure[J].Chinese J.Geophys.(in Chinese),55(1):146-154.
Liu Q Y,Polet J,Komatitsch D,et al.2004.Spectral-elementmoment tensor inversions for earthquakes in southern California[J].Bull.Seism.Soc.Amer.,94(5):1748-1761.
Liu W X,Liu G Z,Zhou G,et al.2011.Crustal thickness and Vp/Vs ratio variations of Xinjiang and surrounding regionsconstrained by receiver function stacking[J].Chinese J.Geophys.(in Chinese),54(8):2034-2041.
Saikia C K.2000.A method for path calibration using regional andteleseismic broadband seismograms:Application to the 21 May1997Jabalpur,India earthquake(MW5.8)[J].Curr.Sci.,79(9):1301-1315.
Shan B,Xiong X,Zheng Y,et al.2011.The co-seismic Coulombstress change and expected seismicity rate caused by 14 April2010 MS=7.1 Yushu,China,earthquake[J].Tectonophysics,510(3):345-353.
Shen Z K,Wan Y G,Gan W J,et al.2003.Viscoelastic triggeringamong large earthquakes along the east Kunlun fault system[J].Chinese J.Geophys.(in Chinese),46(6):786-795.
Thio H K,Kanamori H.1995.Moment-tensor inversions for localearthquakes using surface waves recorded at TERRAscope[J].Bull.Seism.Soc.Amer.,85(4):1021-1038.
Uski M,Hyvnen T,Korja A,et al.2003.Focal mechanisms ofthree earthquakes in Finland and their relation to surface faults[J].Tectonophysics,363(1-2):141-157.
Waldhauser F,Ellsworth W L.2000.A double-differenceearthquake location algorithm:Method and application to thenorthern Hayward fault,California[J].Bull.Seism.Soc.Amer.,90(6):1353-1368.
Wallace T C,Helmberger D V,Mellman G R.1981.A techniquefor the inversion of regional data in source parameter studies[J].J.Geophys.Res.,86(B3):1679-1685.
Wan Y G,Shen Z K,Zeng Y H,et al.2007.Evolution ofcumulative Coulomb failure stress in northeastern QinghaiXizang(Tibetan)Plateau and its effect on large earthquakeoccurrence[J].Acta Seismologica Sinica(in Chinese),29(2):115-129.
Wang Z J.2011.Joint study of source parameters of small tomoderate earthquake[master’s thesis](in Chinese).Hefei:University of Science and Technology of China.
Wei S J,Ni S D,Chong J J,et al.2009.The 16 August 2003Chifeng earthquake:Is it a lower crust earthquake[J].ChineseJ.Geophys.(in Chinese),52(1):111-119.
Xu L S,Chen Y T.2005.Temporal and spatial rupture process ofthe great Kunlun Mountain Pass earthquake of November 14,2001from the GDSN long period waveform data[J].Science inChina Series D,48(1):112-122.
Xu Z H,Yan M,Zhao Z H.1983.Evaluation of the direction oftectonic stress in North China from recorded data of a largenumber of small earthquakes[J].Acta Seismologica Sinica(inChinese),5(3):268-279.
Zhang H M,Jin P,Liu W X,et al.2011.The 3-D velocity modelconstruction of Xinjiang and regional earthquake location[C].Proceeding of the 27th Annual Meeting of the ChineseGeophysical Socity,406.
Zhao J M.2005.Lithospheric structure and geodynamics ofTianshan orogenic belt(in Chinese)[M].Beijing:SeismologicalPress,54-58.
Zhao L S,Helmberger D V.1994.Source estimation frombroadband regional seismograms[J].Bull.Seism.Soc.Amer.,84(1):91-104.
Zhou S Y,Xu Z H,Chen X F.2001.Analysis on the sourcecharacteristics of the 1997Jiashi swarm,Western China[J].Chinese J.Geophys.(in Chinese),44(5):654-662.
Zhu A L,Xu X W,Zhou Y S,et al.2005.Relocation of smallearthquakes in western Sichuan,China and its implications foractive tectonics[J].Chinese J.Geophys.(in Chinese),48(3):629-636.
Zhu L P,Helmberger D V.1996.Advancement in source estimationtechniques using broadband regional seismograms[J].Bull.Seism.Soc.Amer.,86(5):1634-1641.
包丰,倪四道,汪贞杰,等.2011.2003年云南大姚两次强震破裂区重叠程度的研究[J].地震学报,33(3):279-291.
陈建波.2008.新疆地震构造特征研究[D].兰州:中国地震局兰州地震研究所,44-77.
陈伟文,倪四道,汪贞杰,等.2012.2010年高雄地震震源参数的近远震波形联合反演[J].地球物理学报,55(7):2319-2328.
崇加军,倪四道,曾祥方,等.2010.sPL,一个近距离确定震源深度的震相[J].地球物理学报,53(11):2620-2630.
房明山,杜安陆,董孝平,等.1995.用sPn震相测定近震震源深度[J].地震地磁观测与研究,16(5):13-18.
高立新,刘芳,赵蒙生,等.2007.用sPn震相计算震源深度的初步分析与应用[J].西北地震学报,29(3):213-217.
国家地震局震害防御司.1995.中国历史强震目录(公元前23世纪——公元1911年)[M].北京:地震出版社,499-500.
韩立波,蒋长胜,包丰.2012.2010年河南太康MS4.6地震序列震源参数的精确确定[J].地球物理学报,55(9):2973-2981.
胡幸平,俞春泉,陶开,等.2008.利用P波初动资料求解汶川地震及其强余震震源机制解[J].地球物理学报,51(6):1711-1718.
黄媛,杨建思,张天中.2006.2003年新疆巴楚-伽师地震序列的双差法重新定位研究[J].地球物理学报,49(1):162-169.
李欣,刘文学,靳平.2011.中国新疆及邻域Rayleigh波群速度分布及地壳上地幔S波速度结构[C].中国地球物理学会第二十七届年会论文集,394.
刘巧霞,杨卓欣,莘海亮,等.2012.玉树MS7.1级地震部分余震重新定位及发震构造分析[J].地球物理学报,55(1):146-154.
刘文学,刘贵忠,周刚,等.2011.新疆和周边地区地壳厚度和Vp/Vs比值变化的接收函数约束[J].地球物理学报,54(8):2034-2041.
沈正康,万永革,甘卫军,等.2003.东昆仑活动断裂带大地震之间的黏弹性应力触发研究[J].地球物理学报,46(6):786-795.
万永革,沈正康,曾跃华,等.2007.青藏高原东北部的库仑应力积累演化对大地震发生的影响[J].地震学报,29(2):115-129.
汪贞杰.2011.中小地震的多联合研究[硕士论文].合肥:中国科学技术大学.
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