2013年1月29日哈萨克斯坦M_S6.1地震序列的震源机制解分析
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摘要
北京时间2013年1月29日,哈萨克斯坦发生M S6.1地震,为了提高对地震震源机制解的认识,并进一步了解震源区的应力场特征,利用CAP方法反演了此次地震序列震源机制解。反演结果表明,M S6.1地震节面Ⅰ的参数:走向241°,倾角80°,滑动角7°;节面Ⅱ的参数:走向150°,倾角84°,滑动角170°;P轴方位为196°,倾角2°,T轴方位为105°,倾角12°;矩震级M W为6.1;矩心深度为13km;震源类型是左旋走滑型。此次地震序列破裂优势方向为NEE—SWW,倾角以30°~60°居多,滑动角以60°~120°、-60°~-120°居多;P轴方位的优势取向为近NE—SW向,接近水平的居优;T轴优势取向为近SEE—NWW向,接近垂直的居优;震源机制类型以倾向滑动型为主。反演结果与断层的分布、余震分布及哈萨克斯坦中天山(伊犁盆地西部)NEE—SWW向应力场有很好的一致性。
Kazakhstan M S6. 1 earthquake occurved on January 29th,2013. The epicenter is 38 km away from China borderline. People in the Yili river valley generally felt the shaking. In this article,we use the CAP method to invert the focal mechanism of Kazakhstan M S6. 1 earthquake and 15 aftershocks to study the stress field in the focal region. The main research contents of this paper are as follows:
Kazakhstan M S6. 1 earthquake occurved on January 29th,2013. The epicenter is 38 km away from China borderline. People in the Yili river valley generally felt the shaking. In this article,we use the CAP method to invert the focal mechanism of Kazakhstan M S6. 1 earthquake and 15 aftershocks to study the stress field in the focal region. The main research contents of this paper are as follows:
引文
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[2]张项,陈棋福,赵里,等.用P波初动波形求解中小地震震源机制解[J].中国地震,2010,26(3):273-282.
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[16]Lupei Zhu,Ying Tan,Donald V.Helmberger and Chandan K.Saikia.Calibration of the Tibetan Plateau Using Regional Seismic Waveforms[J].Pure and Applied Geophysics,2006,163(7):1 193-1 213.
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[18]张爱萍,倪四道,杨晓勇.2004年东乌珠穆沁旗地震震源参数研究[J].地震,2008,28(3):61-68.
[19]黄建平,倪四道,傅容珊,等.综合近震及远震波形反演2006文安地震(M W5.1)的震源机制解[J].地球物理学报,2009,52(1):120-130.
[20]Kikuchi M,Kanamori H.Inversion of complex body waves I[J].Bul1.Seism.Soc.Amer.,1982,72(2):491-506.
[21]韦生吉,倪四道,崇加军,等.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,2009,52(1):111-119.
[22]Gabi Laske,Guy Masters,Christine Reif.CRUST 2.0[EB/OL].[2013-02-15]http://igppweb.ucsd.edu/~gabi/crust2.html.
[23]胥颐,冯先岳,萨茨洛夫ВИ.天山地区的深部速度结构[J].地震地质,1996,18(4):375-381.
[24]Erik Larson.Global CMT Catalog Search[EB/OL].[2013-02-20]http://www.globalcmt.org/CMTsearch.html.
[25]Current USGS Fast Moment Tensor Solutions[EB/OL].[2013-02-18]http://earthquake.usgs.gov/earthquakes/eqarchives/fm/.
[26]刁桂苓,王绍晋,龙晓帆,等.1976年龙陵震群的小震震源机制[J].地震研究,1996,19(4):331-339.
[2]张项,陈棋福,赵里,等.用P波初动波形求解中小地震震源机制解[J].中国地震,2010,26(3):273-282.
[3]Dziewonski A M,Chou T A,Woodhouse J H.Determination of earthquake source parameters from waveform data for studies of global and regional seismicity[J].J.Geophys.Res.,1981,86:2 825-2 852.
[4]Dreger D S,Helmberger D V.Determination of source parameters at regional distances with three component sparse network data[J].J.Geophys.Res.,1993,98:8 107-8 125.
[5]赵翠萍,陈章立,郑斯华,等.2003年9月27日中、俄、蒙边界M S7.9地震震源机制及破裂过程研究[J].地震学报,2005,27(3):237-249.
[6]周云好,陈章立,缪发军.2001年11月14日昆仑山口西M S8.1地震震源破裂过程研究[J].地震学报,2004,26(S1):9-20.
[7]Kanamori H,Given J W.Use of long period surface waves for rapid determination of the earthquake source parameters[J].Phys.Earth Planet.Interiors,1981,27:8-31.
[8]Thio H K,Kanamori H.Moment-tensor inversions for local earthquakes using surface waves recorded at TERRAscope[J].Bul1.Seis.Soc.Amer.,1995,85:1 021-1 038.
[9]马淑田,姚振兴,纪晨.1996年5月3日内蒙古包头西M S6.4地震的震源机制研究[J].地球物理学报,1998,41(6):795-803.
[10]许力生,陈运泰.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),2004,34(3):256-264.
[11]Takeo M.An inversion method to analyze the rupture processes of earthquakes using near-field seismogram[J].Bul1.Seism.Soc.Amet.,1987,77:490-513.
[12]Sileny J,Panza G F.Inversion of seismograms to determine simultaneously the moment tensor components and source time function for a point source buried in a horizontally layered medium[J].Studia.Geophys.Geod.,199l,35:166-183.
[13]Zhao L S,Helmberger D V.Source estimation from broadband regional eismograms[J].Bul1.Seis.Soc.Amer,1994,84(1):91-104.
[14]Zhu L P,Helmberger D V.Advancement in source estimation techniques using broadband regional seismograms[J].Bull Seism Soc Am,1996,86:1 634-1 641.
[15]Lupei Zhu,Rivera.A note on the dynamic and static displacements from a point source in muhilayered media.Geophys[J].J.Int.,2002,148:619-627.
[16]Lupei Zhu,Ying Tan,Donald V.Helmberger and Chandan K.Saikia.Calibration of the Tibetan Plateau Using Regional Seismic Waveforms[J].Pure and Applied Geophysics,2006,163(7):1 193-1 213.
[17]Tan Y,Zhu L,Helmberger D V,et al.Locating and modeling regional earthquakes with two stations[J].J.Geophys.Res.,2006,111(B01):306-314.
[18]张爱萍,倪四道,杨晓勇.2004年东乌珠穆沁旗地震震源参数研究[J].地震,2008,28(3):61-68.
[19]黄建平,倪四道,傅容珊,等.综合近震及远震波形反演2006文安地震(M W5.1)的震源机制解[J].地球物理学报,2009,52(1):120-130.
[20]Kikuchi M,Kanamori H.Inversion of complex body waves I[J].Bul1.Seism.Soc.Amer.,1982,72(2):491-506.
[21]韦生吉,倪四道,崇加军,等.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,2009,52(1):111-119.
[22]Gabi Laske,Guy Masters,Christine Reif.CRUST 2.0[EB/OL].[2013-02-15]http://igppweb.ucsd.edu/~gabi/crust2.html.
[23]胥颐,冯先岳,萨茨洛夫ВИ.天山地区的深部速度结构[J].地震地质,1996,18(4):375-381.
[24]Erik Larson.Global CMT Catalog Search[EB/OL].[2013-02-20]http://www.globalcmt.org/CMTsearch.html.
[25]Current USGS Fast Moment Tensor Solutions[EB/OL].[2013-02-18]http://earthquake.usgs.gov/earthquakes/eqarchives/fm/.
[26]刁桂苓,王绍晋,龙晓帆,等.1976年龙陵震群的小震震源机制[J].地震研究,1996,19(4):331-339.
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