2004年阳江4.9级地震破裂方位角研究
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摘要
在一维有限移动震源模式下,根据地震波传播过程中的多普勒效应利用S波或P波拐角频率的方向性来确定地震破裂面的方法,计算了2003年11月~2005年10月阳江地区13次ML≥2.5地震的发震断层走向,结果显示:利用S波、P波拐角频率得到的2004年9月阳江4.9级地震破裂方位角分别为167°和166°,地震序列以NNW为主要破裂方向。
In the basis of Doppler effect in the process of seismic wave's propagation, the corner frequency of wave P or S can be used to determine the rupture plane under 1D finite moving source model.The rupture azimuthes for M_L≥2.5 Yangjiang earthquakes occurred from November 2003 to October 2005 are calculated with this method.The results show that the azimuth of the fault plane for M4.9 Yangjiang earthquake is about 167°and 166°respectively from the corner frequnce of wave P or S,and the main rupture direction is NNW.
In the basis of Doppler effect in the process of seismic wave's propagation, the corner frequency of wave P or S can be used to determine the rupture plane under 1D finite moving source model.The rupture azimuthes for M_L≥2.5 Yangjiang earthquakes occurred from November 2003 to October 2005 are calculated with this method.The results show that the azimuth of the fault plane for M4.9 Yangjiang earthquake is about 167°and 166°respectively from the corner frequnce of wave P or S,and the main rupture direction is NNW.
引文
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2 L i Y and Thurber C H.Source properties of two m icroearth-quakes atK ilauea volcano,Hawaii[J].Bu ll Se ism Soc Am,1988,78:1 123-1 132.
3许向彤,陈运泰,王培德,等.1995年7月20日怀来盆地ML=4.1地震的破裂过程[J].地震学报,1999,21(6):570~582.3 Xu X iangtong,Chen Yuntai,W ang Pe ide,et al.Ruptureprocess of theML=4.1 earthquake in Huailai basin on Ju ly20,1995[J].Acta Se ismologica S in ica,1999,21(6):570-582.(in Ch inese)
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6陈学忠,王琼,刘冬英.1995年河北沙城ML4.1地震发震断层参数测定[J].地震,2005,25(2):69~74.6 Chen Xuezhong,W ang Q iong and L iu Dongying.Fau lt p lanedeterm ination for the 1995ML4.1 Shacheng earthquake,Hebe i Province[J].Earthquake,2005,25(2):69-74.(in Ch inese)
7 Andrews D J.Ob jective determ ination of source param eterand sim ilarity of earthquakes of d ifferent size[A].In:DasS,Boatwright J,Scholz C H.Earthquake Source M echan ics[C].W ash ington D C:AGU,1986.259-267.
8徐果明,周惠兰.地震学原理[M].北京:科学出版社,1982.8 Xu Guom ing and Zhou Hu ilan.E lem ents of se ismology[M].Be ijing:Sc ience Press,1982.(in Ch inese)
9康英,杨选,吕金水,等.2004年阳江Ms4.9地震震源参数分析[J].地震,2005,25(3):109~114.9 Kang Y ing,Yang Xuan,Lu Jinshu i,et al.Analysis on thesource param eters of Yangjiang earthquake w ithMS4.9 in2004[J].Earthquake,2005,25(3):109-114.(in Ch i-nese)
10秦乃刚,刘特培.2004年9月17日阳江4.9级地震序列的一些特征[J].华南地震,2005,25(4):34~41.10 Q in Naigang and L iu Tepe i.Som e characteristics ofYangjiangM4.9 earthquake sequence on september 17,2004[J].South Ch ina Journal of Se ismology,2005,25(4):34-41.(in Ch inese)
11钟贻军,任震寰.1969年阳江6.4级地震发震构造研究[J].大地测量与地球动力学,2003,23(4):92~98.11 Zhong Y ijun and Ren Zhenhuan.Study on se ismogen ic tec-ton ic ofYangjiangM6.4 earthquake[J].Journal ofGeode-sy and Geodynam ics,2003,23(4):92-98.(in Ch inese)
12林纪曾,梁国昭,赵毅,等.东南沿海地区的震源机制与构造应力场[J].地震学报,1980,2(3),245~257.12 L in Jizeng,L iang Guozhao,Zhao Y i,et al.Focal m echa-n ism and tecton ic stress field of coastal Southeast Ch ina[J].Acta Se ismologica S in ica,1980,2(3),245-257.(in Ch inese)
13蒋维强,林纪曾,赵毅,等.华南地区的小震震源机制与构造应力场[J].中国地震,1992,8(1):36~42.13 JiangW e iq iang,L in Jizeng,Zhao Y i,et al.Focalm echa-n ism of sm all earthquake and characteristics of tecton icstress field in South Ch ina[J].Earthquake Research inCh ina,1992,8(1):36~42.(in Ch inese)
14康英,杨选,吕金水,等.广东及邻区地震的震源机制特征[J].中国地震,2005,21(3):320~331.14 Kang Y ing,Yang Xuan,Lu Jinshu i,et al.Characteristicsof focalm echan ism in the Guangdong and its ad jacent areas[J].Earthquake Research in Ch ina,2005,21(3):320-331.
15汪素云,许忠淮.中国东部大陆的地震构造应力场[J].地震学报,1985,7(1):17~31.15 W ang Suyun and Xu Zhonghuai.Se ismo-tecton ic stressfield in East Ch ina[J].Acta Se ismologica S in ica,1985,7(1):17-31.(in Ch inese)
16魏柏林.余震震源机制变化的原因[J].地球物理学报,1980,23(1):25~34.16 W e i Bailin.Cause of the change of focalm echan ism s of af-tershocks[J].Acta Geophysica S in ica,1980,23(1):25-34.(in Ch inese)
17魏柏林,徐辉龙,谢明富.东南沿海地震区的现代构造应力场[J].华南地震,1996,16(4):11~19.17 W e i Bailin,Xu Hu ilong and X ie M ingfu.Recent tecton icstress field in the Southeast Ch ina coastal se ism ic zone[J].South Ch ina Journal of Se ismology,1996,16(4):11-19.(in Ch inese)
18高孟潭,姜慧,俞言祥,等.震源机制和断层面的介质刚度对强地面运动的影响[J].岩石力学与工程学报,2005,24(17):3 101~3 106.18 Gao M engtan,Jiang Hu i,Yu Yanxiang,et al.E ffects ofm echan ism and rigid ity of fau lt surface on strong groundmotion[J].Ch inese Journal of Rock M echan ics and Engi-neering,2005,24(17):3 101-3 106.(in Ch inese)
19小山顺二,郑斯华.断层破裂传播速度与破坏性地震的烈度分布[J].地震学报,1991,13(2):190~201.19 Jun ji Koyam a and Zheng S ihua.Se ism ic intensity d istribu-tion of shallow earthquakes due to rupture veloc ities andfau lting modes[J].Acta Se ismologica S in ica,1991,13(2):190-201.(in Ch inese)
20王妙月,杨懋源,胡毓良,等.新风江水库地震的震源机制解及其成因初步讨论[J].地球物理学报,1976,19(1):1~17.20 W angM iaoyue,YangM aoyuan,Hu Yu liang,et al.M ech-an ism of the reservoir impound ing earthquakes at X in-fengjiang and a prelim inary endeavour to d iscuss the ir cause[J].Acta Geophysica S in ica,1976,19(1):1-17.(inCh inese)
①广东省地震局地震应急指挥部办公室.2004年9月17日阳江市平冈镇4.9级地震应急工作总结.广东省地震局,2004.
2 L i Y and Thurber C H.Source properties of two m icroearth-quakes atK ilauea volcano,Hawaii[J].Bu ll Se ism Soc Am,1988,78:1 123-1 132.
3许向彤,陈运泰,王培德,等.1995年7月20日怀来盆地ML=4.1地震的破裂过程[J].地震学报,1999,21(6):570~582.3 Xu X iangtong,Chen Yuntai,W ang Pe ide,et al.Ruptureprocess of theML=4.1 earthquake in Huailai basin on Ju ly20,1995[J].Acta Se ismologica S in ica,1999,21(6):570-582.(in Ch inese)
4许向彤,陈运泰,王培德,等.1995年7月20日怀来盆地ML4.1地震序列震源参数的精确测定[J].地震学报,2001,23(3):225-238.4 Xu X iangtong,Chen Yuntai,W ang Pe ide,et al.Prec isedeterm ination of focal param eters of Ju ly 20,1995ML4.1earthquake sequence in the Huailai basin[J].Acta Se is-mologica S in ica,2001,23(3):225-238.(in Ch inese)
5杨福平,严尊国.湖北省秭归ML3.6地震震源特征[J].大地测量与地球动力学,2002,22(4):92~96.5 Yang Fup ing and Yan Zunguo.Source Characteristics ofZ igu i(Hube i)ML3.6 earthquake[J].Journal of Geodesyand Geodynam ics,2002,22(4):92-96.(in Ch inese)
6陈学忠,王琼,刘冬英.1995年河北沙城ML4.1地震发震断层参数测定[J].地震,2005,25(2):69~74.6 Chen Xuezhong,W ang Q iong and L iu Dongying.Fau lt p lanedeterm ination for the 1995ML4.1 Shacheng earthquake,Hebe i Province[J].Earthquake,2005,25(2):69-74.(in Ch inese)
7 Andrews D J.Ob jective determ ination of source param eterand sim ilarity of earthquakes of d ifferent size[A].In:DasS,Boatwright J,Scholz C H.Earthquake Source M echan ics[C].W ash ington D C:AGU,1986.259-267.
8徐果明,周惠兰.地震学原理[M].北京:科学出版社,1982.8 Xu Guom ing and Zhou Hu ilan.E lem ents of se ismology[M].Be ijing:Sc ience Press,1982.(in Ch inese)
9康英,杨选,吕金水,等.2004年阳江Ms4.9地震震源参数分析[J].地震,2005,25(3):109~114.9 Kang Y ing,Yang Xuan,Lu Jinshu i,et al.Analysis on thesource param eters of Yangjiang earthquake w ithMS4.9 in2004[J].Earthquake,2005,25(3):109-114.(in Ch i-nese)
10秦乃刚,刘特培.2004年9月17日阳江4.9级地震序列的一些特征[J].华南地震,2005,25(4):34~41.10 Q in Naigang and L iu Tepe i.Som e characteristics ofYangjiangM4.9 earthquake sequence on september 17,2004[J].South Ch ina Journal of Se ismology,2005,25(4):34-41.(in Ch inese)
11钟贻军,任震寰.1969年阳江6.4级地震发震构造研究[J].大地测量与地球动力学,2003,23(4):92~98.11 Zhong Y ijun and Ren Zhenhuan.Study on se ismogen ic tec-ton ic ofYangjiangM6.4 earthquake[J].Journal ofGeode-sy and Geodynam ics,2003,23(4):92-98.(in Ch inese)
12林纪曾,梁国昭,赵毅,等.东南沿海地区的震源机制与构造应力场[J].地震学报,1980,2(3),245~257.12 L in Jizeng,L iang Guozhao,Zhao Y i,et al.Focal m echa-n ism and tecton ic stress field of coastal Southeast Ch ina[J].Acta Se ismologica S in ica,1980,2(3),245-257.(in Ch inese)
13蒋维强,林纪曾,赵毅,等.华南地区的小震震源机制与构造应力场[J].中国地震,1992,8(1):36~42.13 JiangW e iq iang,L in Jizeng,Zhao Y i,et al.Focalm echa-n ism of sm all earthquake and characteristics of tecton icstress field in South Ch ina[J].Earthquake Research inCh ina,1992,8(1):36~42.(in Ch inese)
14康英,杨选,吕金水,等.广东及邻区地震的震源机制特征[J].中国地震,2005,21(3):320~331.14 Kang Y ing,Yang Xuan,Lu Jinshu i,et al.Characteristicsof focalm echan ism in the Guangdong and its ad jacent areas[J].Earthquake Research in Ch ina,2005,21(3):320-331.
15汪素云,许忠淮.中国东部大陆的地震构造应力场[J].地震学报,1985,7(1):17~31.15 W ang Suyun and Xu Zhonghuai.Se ismo-tecton ic stressfield in East Ch ina[J].Acta Se ismologica S in ica,1985,7(1):17-31.(in Ch inese)
16魏柏林.余震震源机制变化的原因[J].地球物理学报,1980,23(1):25~34.16 W e i Bailin.Cause of the change of focalm echan ism s of af-tershocks[J].Acta Geophysica S in ica,1980,23(1):25-34.(in Ch inese)
17魏柏林,徐辉龙,谢明富.东南沿海地震区的现代构造应力场[J].华南地震,1996,16(4):11~19.17 W e i Bailin,Xu Hu ilong and X ie M ingfu.Recent tecton icstress field in the Southeast Ch ina coastal se ism ic zone[J].South Ch ina Journal of Se ismology,1996,16(4):11-19.(in Ch inese)
18高孟潭,姜慧,俞言祥,等.震源机制和断层面的介质刚度对强地面运动的影响[J].岩石力学与工程学报,2005,24(17):3 101~3 106.18 Gao M engtan,Jiang Hu i,Yu Yanxiang,et al.E ffects ofm echan ism and rigid ity of fau lt surface on strong groundmotion[J].Ch inese Journal of Rock M echan ics and Engi-neering,2005,24(17):3 101-3 106.(in Ch inese)
19小山顺二,郑斯华.断层破裂传播速度与破坏性地震的烈度分布[J].地震学报,1991,13(2):190~201.19 Jun ji Koyam a and Zheng S ihua.Se ism ic intensity d istribu-tion of shallow earthquakes due to rupture veloc ities andfau lting modes[J].Acta Se ismologica S in ica,1991,13(2):190-201.(in Ch inese)
20王妙月,杨懋源,胡毓良,等.新风江水库地震的震源机制解及其成因初步讨论[J].地球物理学报,1976,19(1):1~17.20 W angM iaoyue,YangM aoyuan,Hu Yu liang,et al.M ech-an ism of the reservoir impound ing earthquakes at X in-fengjiang and a prelim inary endeavour to d iscuss the ir cause[J].Acta Geophysica S in ica,1976,19(1):1-17.(inCh inese)
①广东省地震局地震应急指挥部办公室.2004年9月17日阳江市平冈镇4.9级地震应急工作总结.广东省地震局,2004.
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