用CAP方法研究久治—玛曲Ms4.1级地震震源机制
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摘要
选用区域数字地震台网的波形资料,利用CAP方法反演了2011年3月3日久治—玛曲4.1级地震震源机制解。反演结果显示,本次地震的最佳双力偶解为节面Ⅰ走向306°、倾角82°、滑动角-5°,节面Ⅱ走向37°、倾角85°、滑动角-172°,地震类型为走滑型,震源深度为5.5 km,属于汶川地震后区域应力场调整引发的一次地震事件。
In this paper,using waveform from regional seismological network and CAP method,we get Jiuzhi Maqu 4.1 earthquake on March 3,2011.The result shows that the best double solution is 306°,82° and-5° for strike,dip and slip angles respectively with the other nodal plane of 37°,85° and-172°.The earthquake belongs to strike-slip type and the focal depth is 5.5 km.The regional stress adjustives after Wenchuan earthquake arose the Jiuzhi-Maqu earthquake.
In this paper,using waveform from regional seismological network and CAP method,we get Jiuzhi Maqu 4.1 earthquake on March 3,2011.The result shows that the best double solution is 306°,82° and-5° for strike,dip and slip angles respectively with the other nodal plane of 37°,85° and-172°.The earthquake belongs to strike-slip type and the focal depth is 5.5 km.The regional stress adjustives after Wenchuan earthquake arose the Jiuzhi-Maqu earthquake.
引文
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[2]Dreger D S,Helmbaerger 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.
[3]Patton H J.Refernce point method for determing the source and path effects of sourface waves[J].J.Geophys.Res.,1980,85:821-848.
[4]Thio H K,H Kanamori.Moment-tensor inversions for local earthquakes using surface waves recorded at TERRAscope[J].Bull.Seis.Soc.Amer.,1995,85:1 021-1 038.
[5]刘超,张勇,许力生,等.一种矩张量反演新方法及其对2008年汶川Ms8.0地震序列的应用[J].地震学报,2008,30(4):329-339.
[6]许力生,蒋长胜,陈运泰,等.2004年首都圈地区中小地震的矩张量反演[J].地震学报,2007,29(3):229-239.
[7]周云好,许力生,陈运泰.2000年6月4日印度尼西亚苏门答腊南部Ms8.0地震的震源机制[J].地震学报,2002,24(5);462-469.
[8]Helmberger D V,Engen G R.Modeling the long-period body waves from shallow earthquakes at regional ranges[J].BulI.Seism.Soc.Amer.,1980,70:1 699-1 114,
[9]Helmberger D V.Theory and application of synthetic seismograms,in Earthquakes:Observation,Theory and Interpretation[C]//LXXXV Corso Soc,1983,Italiana di Fisica-Bologna-Italy,1983:1-20.
[10]姚振兴,郑天愉,曹柏如,等.用P波波形资料测定中强地震震源过程的方法[J].地球物理学进展,1991,6(4):6-36.
[11]姚振兴,郑天愉,温联星.用P波波形资料反演中强地震地震矩张量的方法[J].地球物理学报,1994,37(1):36-44.
[12]Chen Y.T,Zhou J.Y.,Ni J.C.Inversion of nearsource broadband accelerograms for the earthquake source-time-function[J].Tectonophysics,1991,197:89-98.
[13]吴忠良,陈运泰,倪江川,等.近震源宽频带记录的地震矩张量反演[J].地震学报,1994,16(2):141-152.
[14]Zhao L S,Helmberger D V.Source estimation from broadband regional seismograms[J].Bull.Seis.Soc.Amer.,1994,84(1):91-104.
[15]Zhu L,Helmberger D V.Advancement in Source Estimation Techniques Using Broadband Regional Seismograms[J].Bull.Seism.Soc.Amer.,1996,86:1 634-1 641.
[16]Zhu L P,Rivera L A.A note on the dynamic and static displacements from a point source in multilayered media[J].Geophys.J.Int.,2002,148:619-627.
[17]Tan Y,Zhu L,Helmberger DV,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,等.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(Mw5.1)的震源机制解[J].地球物理学报,2009,52(1):120-130.
[20]张辉,徐辉,姚军,等.祁连山中东段基于CAP方法的中小地震震源机制研究[J].山西地震,2010,141(1):25-29.
[21]李少华,王彦宾,梁子斌,等.甘肃东南部地壳速度结构的区域地震波形反演[J].地球物理学报,2012,55(4):1 186-1 197.
[2]Dreger D S,Helmbaerger 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.
[3]Patton H J.Refernce point method for determing the source and path effects of sourface waves[J].J.Geophys.Res.,1980,85:821-848.
[4]Thio H K,H Kanamori.Moment-tensor inversions for local earthquakes using surface waves recorded at TERRAscope[J].Bull.Seis.Soc.Amer.,1995,85:1 021-1 038.
[5]刘超,张勇,许力生,等.一种矩张量反演新方法及其对2008年汶川Ms8.0地震序列的应用[J].地震学报,2008,30(4):329-339.
[6]许力生,蒋长胜,陈运泰,等.2004年首都圈地区中小地震的矩张量反演[J].地震学报,2007,29(3):229-239.
[7]周云好,许力生,陈运泰.2000年6月4日印度尼西亚苏门答腊南部Ms8.0地震的震源机制[J].地震学报,2002,24(5);462-469.
[8]Helmberger D V,Engen G R.Modeling the long-period body waves from shallow earthquakes at regional ranges[J].BulI.Seism.Soc.Amer.,1980,70:1 699-1 114,
[9]Helmberger D V.Theory and application of synthetic seismograms,in Earthquakes:Observation,Theory and Interpretation[C]//LXXXV Corso Soc,1983,Italiana di Fisica-Bologna-Italy,1983:1-20.
[10]姚振兴,郑天愉,曹柏如,等.用P波波形资料测定中强地震震源过程的方法[J].地球物理学进展,1991,6(4):6-36.
[11]姚振兴,郑天愉,温联星.用P波波形资料反演中强地震地震矩张量的方法[J].地球物理学报,1994,37(1):36-44.
[12]Chen Y.T,Zhou J.Y.,Ni J.C.Inversion of nearsource broadband accelerograms for the earthquake source-time-function[J].Tectonophysics,1991,197:89-98.
[13]吴忠良,陈运泰,倪江川,等.近震源宽频带记录的地震矩张量反演[J].地震学报,1994,16(2):141-152.
[14]Zhao L S,Helmberger D V.Source estimation from broadband regional seismograms[J].Bull.Seis.Soc.Amer.,1994,84(1):91-104.
[15]Zhu L,Helmberger D V.Advancement in Source Estimation Techniques Using Broadband Regional Seismograms[J].Bull.Seism.Soc.Amer.,1996,86:1 634-1 641.
[16]Zhu L P,Rivera L A.A note on the dynamic and static displacements from a point source in multilayered media[J].Geophys.J.Int.,2002,148:619-627.
[17]Tan Y,Zhu L,Helmberger DV,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,等.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(Mw5.1)的震源机制解[J].地球物理学报,2009,52(1):120-130.
[20]张辉,徐辉,姚军,等.祁连山中东段基于CAP方法的中小地震震源机制研究[J].山西地震,2010,141(1):25-29.
[21]李少华,王彦宾,梁子斌,等.甘肃东南部地壳速度结构的区域地震波形反演[J].地球物理学报,2012,55(4):1 186-1 197.
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