2012年6月30日新疆新源-和静M_S6.6地震序列震源机制解
|
摘要
利用CAP方法反演了2012年6月30日新源-和静MS6.6地震序列震源机制解。反演得到MS6.6地震节面Ⅰ的参数为:走向299°,倾角68°,滑动角164°;节面Ⅱ的参数为:走向35°,倾角75°,滑动角23°;P轴方位角166°,倾角5°,T轴方位角258°,倾角26°;矩震级Mw为6.3;矩心深度为21km。此次地震序列破裂优势方向为NWW,倾角以60°~90°为主,滑动角以±180°±30°为主;P轴方位的优势取向为近NS向,T轴优势取向为近EW向。初步分析表明,主震节面Ⅰ为发震断层,是走向为NWW、近乎直立的左旋走滑断层。此次6.6级地震震源断错性质和主压应力方向以及序列P轴优势方位与震源区周围构造应力场特征基本一致。
Using the CAP method to invert the focal-mechanism solution of the Xinyuan-Hejing MS6. 6 earthquake on June 30,2012. The result shows that the best double couple solution of the MS6. 6 event is 299°,68° and 164° for strike,dip and rake angles respectively. The other nodal planes are 35°,75° and 23°. The azimuth and dip angle of P axis are 166° and 5°,those of T axis are 258° and 26°. The moment magnitude is 6. 3. The estimated focal depth is about 21 km.The predominant rupture direction of this seismic sequence is NWW. The dip angles are between60° and 90°. The rake angles are basically ± 180° ± 30°. The predominant strike of the azimuthal angle of P axis is near NS and T axis is near EW. Preliminary analysis indicates that nodal section. One is the seismogenic fault and NWW-trend and nearly upright left-lateral strikeslip fault. The displacement property and the principal compressive stress of this MS6. 6earthquake focus and P axis preponderant orientation of this seismic sequence agree with the tectonic stress field's characteristics of the focal area around.
Using the CAP method to invert the focal-mechanism solution of the Xinyuan-Hejing MS6. 6 earthquake on June 30,2012. The result shows that the best double couple solution of the MS6. 6 event is 299°,68° and 164° for strike,dip and rake angles respectively. The other nodal planes are 35°,75° and 23°. The azimuth and dip angle of P axis are 166° and 5°,those of T axis are 258° and 26°. The moment magnitude is 6. 3. The estimated focal depth is about 21 km.The predominant rupture direction of this seismic sequence is NWW. The dip angles are between60° and 90°. The rake angles are basically ± 180° ± 30°. The predominant strike of the azimuthal angle of P axis is near NS and T axis is near EW. Preliminary analysis indicates that nodal section. One is the seismogenic fault and NWW-trend and nearly upright left-lateral strikeslip fault. The displacement property and the principal compressive stress of this MS6. 6earthquake focus and P axis preponderant orientation of this seismic sequence agree with the tectonic stress field's characteristics of the focal area around.
引文
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,地球物理学报,55(7),2319~2328。
刁桂苓、王绍晋、龙晓帆等,1996,1976年龙陵震群的小震震源机制,地震研究,19(4),331~339。
高国英、聂晓红、龙海英,2010,2003~2008年新疆区域构造应力场特征探讨,地震地质,32(1),70~79。
黄建平、倪四道、傅容珊等,2009,综合近震及远震波形反演2006文安地震(MW5.1)的震源机制解,地球物理学报,52(1),120~130。
龙海英、高国英、聂晓红等,2008,北天山中东段中小地震震源机制解及应力场反演,地震,28(1),93~99。
马淑田、姚振兴、纪晨,1998,1996年5月3日内蒙古包头西MS6.4级地震的震源机制研究,地球物理学报,41(6),795~803。
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,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,中国科学D辑,34(3),256~264。
胥颐、冯先岳、萨.,ВИ,1996,天山地区的深部速度结构,地震地质,18(4),375~381。
尹光华,1993,伊犁盆地新构造运动与地震,内陆地震,7(2),180~187。
张爱萍、倪四道、杨晓勇,2008,2004年东乌珠穆沁旗地震震源参数研究,地震,28(3),61~68。
张国民、汪素云、李丽等,2002,中国大陆地震震源深度及其构造含义,科学通报,47(9),663~668。
张项、陈棋福、赵里等,2010,用P波初动波形求解中小地震震源机制解,中国地震,26(3),273~282。
赵翠萍、陈章立、郑斯华等,2005,2003年9月27日中、俄、蒙边界MS7.9地震震源机制及破裂过程研究,地震学报,27(3),237~249。
周云好、陈章立、缪发军,2004,2001年11月14日昆仑山口西MS8.1地震震源破裂过程研究,地震学报,26(S1),9~20。
Dreger D S,Helmberger D V,1993,Determination of source parameters at regional distances with three component sparse network data,J Geophys Res,98,8107~8125.
Dziewonski A M,Chou T A,Woodhouse J H,1981,Determination of earthquake source parameters from waveform data for studies of global and regional seismicity,J Geophys Res,86,2825~2852.
Kanamori H,Given J W,1981,Use of long period surface waves for rapid determination of the earthquake source parameters,Phys Earth Planet Interiors,27,8~31.
Kikuchi M,Kanamori H,1982,Inversion of complex body waves I,Bul1,Seism Soc Am,72(2),491~506.
Sileny J,Panza G F,199l,Inversion of seismograms to determine simultaneously the moment tensor components and source time function for a point source buried in a horizontally layered medium,Studia Geophys Geod,35,166~183.
Takeo M,1987,An inversion method to analyze the rupture processes of earthquakes using near-field seismogram,Bul1 Seism Soc Am,77,490~513.
Tan Y,Zhu L,Helmberger D V,et al,2006,Locating and modeling regional earthquakes with two stations,J Geophys Res,111(B01),306~314.
Thio H K,Kanamori H,1995,Moment-tensor inversions for local earthquakes using surface waves recorded at TERRAscope,Bul1.Seism Soc Amet,85,1021~1038.
Zhao L S,Helmberger D V,1994,Source estimation from broadband regional seismograms,Bul1 Seism Soc Am,84(1),91~104.
Zhu L P,Helmberger D V,1996,Advancement in source estimation techniques using broadband regional seismograms,Bull Seism Soc Am,86,1634~1641.
Zhu L P,Rivera,2002,A note on the dynamic and static displacements from a point source in muhilayered media,Geophys J Int,148 ,619~627.
Zhu L P,Ying T,Donald V,et al,2006,Calibration of the Tibetan Plateau using regional seismic waveforms,Pure and Applied Geophysics,163(7),1193~1213.
1新疆维吾尔自治区地震局,2008,2012年6月30日新疆新源-和静6.6级地震考察报告
刁桂苓、王绍晋、龙晓帆等,1996,1976年龙陵震群的小震震源机制,地震研究,19(4),331~339。
高国英、聂晓红、龙海英,2010,2003~2008年新疆区域构造应力场特征探讨,地震地质,32(1),70~79。
黄建平、倪四道、傅容珊等,2009,综合近震及远震波形反演2006文安地震(MW5.1)的震源机制解,地球物理学报,52(1),120~130。
龙海英、高国英、聂晓红等,2008,北天山中东段中小地震震源机制解及应力场反演,地震,28(1),93~99。
马淑田、姚振兴、纪晨,1998,1996年5月3日内蒙古包头西MS6.4级地震的震源机制研究,地球物理学报,41(6),795~803。
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,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,中国科学D辑,34(3),256~264。
胥颐、冯先岳、萨.,ВИ,1996,天山地区的深部速度结构,地震地质,18(4),375~381。
尹光华,1993,伊犁盆地新构造运动与地震,内陆地震,7(2),180~187。
张爱萍、倪四道、杨晓勇,2008,2004年东乌珠穆沁旗地震震源参数研究,地震,28(3),61~68。
张国民、汪素云、李丽等,2002,中国大陆地震震源深度及其构造含义,科学通报,47(9),663~668。
张项、陈棋福、赵里等,2010,用P波初动波形求解中小地震震源机制解,中国地震,26(3),273~282。
赵翠萍、陈章立、郑斯华等,2005,2003年9月27日中、俄、蒙边界MS7.9地震震源机制及破裂过程研究,地震学报,27(3),237~249。
周云好、陈章立、缪发军,2004,2001年11月14日昆仑山口西MS8.1地震震源破裂过程研究,地震学报,26(S1),9~20。
Dreger D S,Helmberger D V,1993,Determination of source parameters at regional distances with three component sparse network data,J Geophys Res,98,8107~8125.
Dziewonski A M,Chou T A,Woodhouse J H,1981,Determination of earthquake source parameters from waveform data for studies of global and regional seismicity,J Geophys Res,86,2825~2852.
Kanamori H,Given J W,1981,Use of long period surface waves for rapid determination of the earthquake source parameters,Phys Earth Planet Interiors,27,8~31.
Kikuchi M,Kanamori H,1982,Inversion of complex body waves I,Bul1,Seism Soc Am,72(2),491~506.
Sileny J,Panza G F,199l,Inversion of seismograms to determine simultaneously the moment tensor components and source time function for a point source buried in a horizontally layered medium,Studia Geophys Geod,35,166~183.
Takeo M,1987,An inversion method to analyze the rupture processes of earthquakes using near-field seismogram,Bul1 Seism Soc Am,77,490~513.
Tan Y,Zhu L,Helmberger D V,et al,2006,Locating and modeling regional earthquakes with two stations,J Geophys Res,111(B01),306~314.
Thio H K,Kanamori H,1995,Moment-tensor inversions for local earthquakes using surface waves recorded at TERRAscope,Bul1.Seism Soc Amet,85,1021~1038.
Zhao L S,Helmberger D V,1994,Source estimation from broadband regional seismograms,Bul1 Seism Soc Am,84(1),91~104.
Zhu L P,Helmberger D V,1996,Advancement in source estimation techniques using broadband regional seismograms,Bull Seism Soc Am,86,1634~1641.
Zhu L P,Rivera,2002,A note on the dynamic and static displacements from a point source in muhilayered media,Geophys J Int,148 ,619~627.
Zhu L P,Ying T,Donald V,et al,2006,Calibration of the Tibetan Plateau using regional seismic waveforms,Pure and Applied Geophysics,163(7),1193~1213.
1新疆维吾尔自治区地震局,2008,2012年6月30日新疆新源-和静6.6级地震考察报告
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |