由矩张量反演得到的北部湾地震的震源机制
摘要
1994年 1 2月 31日和 1 995年 1月 1 0日 ,在北部湾海域发生了 MS=6.0和 MS=6.1地震 .运用广义反射 -透射系数矩阵方法计算格林函数 ,利用中国数字地震台网 (CDSN)记录的两次地震的长周期体波资料 ,用频率域矩张量反演方法得到了这两次地震的震源机制 .反演结果表明 ,这两次地震都是以剪切位错为主的事件 ,它们都是在相同的构造环境下 ,受到同一断裂的构造运动所控制 ,在北西 -南东向为主压应力、北东 -南西向的主张应力的作用下发生的 .连续发生的 MS=6.0 ,6.1地震 ,与菲律宾海板块和欧亚板块沿近北西 -南东向碰撞有关 .MS=6.0地震发生后震源区应力场发生了明显的变化 ,MS=6.1地震的发生与 MS=6.0地震的发生引起的应力场调整有一定的联系 .
引文
陈运泰 ,吴忠良 ,王培德 ,等 . 1999.数字地震学 .北京 :地震出版社
傅昌洪 ,沈繁銮 ,吴德珍 ,等 . 1996 .北部湾 6 .1,6 .2级地震的震源参数和 QP值特征 .华南地震 ,16 ( 3) :6 4～ 71
罗振暖 ,胡瑞贺 ,李纯清 . 1996 .北部湾地震的动力学参数与应力场 .华南地震 ,16 ( 3) :72～ 76
倪江川 ,陈运泰 ,王鸣 ,等 . 1991.云南禄劝地震部分余震的矩张量反演 .地震学报 ,13( 4) :4 12～ 4 19
吴忠良 ,陈运泰 ,倪江川 ,等 . 1994 .近震源宽频带记录的地震矩张量反演 .地震学报 ,16 ( 2 ) :14 1～ 152
吴时平 ,王林 ,黄妙影 . 1996 .北部湾 6 .1,6 .2级地震序列特征 .华南地震 ,16 ( 3) :58～ 6 3
许力生 . 1995.地震破裂时空过程的研究 :[学位论文 ] .北京 :国家地震局地球物理研究所 ,18～ 19
尹克坚 ,吴时平 ,王林 . 1996 .北部湾地震的震源机制及地震地质条件 .华南地震 ,16 ( 3) :77～ 81
Aki K ,Richard P G.1980 .Quantitative Seismology:Theory and Methods.Vols 1and 2 .San Francisco:W H Freeman,932Aki K,Patton H. 1978. Determination of seismic momenttensorusing surface waves. Tectonophysics,4 9:2 13～ 2 2 2
Bouchon M. 1981.A sim plem ethod to calculate Green′sfunctionsforelasticlayered media.Bull Seism Soc Amer,71:959～971
Caskey S J,Wesnousky S G.1997.Static stress changes and earthquake triggering during the 1954 Fairview Peak and DixieV alley earthquake,central Nevada.Bull Seism Soc Amer,87:52 1～ 52 7
Deng J,Sykes L R.1997a.Evolution of stress field in southern California and triggering ofm oderate- size earthquake:a2 0 0 -year perspective. J Geophys Res,10 2 :9859～ 9886
Deng J,Sykes L R. 1997b. Stressevolution in southern California and trigging of moderate- ,small- ,and micro- size earth-quake. J Geophys Res,10 2 :2 4 4 11～ 2 4 4 35
Dziewonski A M,Chou T- A ,Woodhouse JH.1981. Determ ination of earthquake source param etersfrom waveform data forstudies of global and regional seismicity. J Geophys Res,86 :2 82 5～ 2 852
Fitch T J,N orth R G,Sields M W. 1981.Focal depth and momenttensorrepresentation of shallow earthquakes associatedw ith the great Sumba earthquake.J Geophys Res,86 :9357～ 9374
Gilbert F. 1970 . Excitation of the normal modes of the Earth by earthquake sources. Geophys J R astr Soc,2 2 :2 2 3～ 2 2 6
Gilbert F,Dziewonski A M. 1975. An application of normal m ode theory to the retrieval of structural parameters and sourcem echanisms from seism ic spectra. Phil Trans R Soc London,A2 78:187～ 2 6 9
Gom berg J,Blanpied M L,Beeler N M. 1997. Transient triggering of near and distantearthquakes.Bull Seism Soc Amer,87:2 94～ 30 9
Helmberger D V. 196 8.The crust- mantle transition in the Bering Sea.Bull Seism Soc Amer,58:179～ 2 14
Kanam ori H,Given JW. 1981.U se of long period surface waves for rapid determination of the earthquake source parame-ters. Phys Earth Planet Inter,2 7:8～ 31
Kennett B L N,Kerry N J. 1979. Seismic waves in a stratified half space. Geophys J R astr Soc,57:557～ 583
Kennett B L N. 1980 . Seism ic wavesin a stratified half space II.Theoretical seismograms. Geophys J R astr Soc,6 1:1～ 10
Kennett B L N. 1983. Seismic Wave Propagation in Stratified Media. Cam bridge:Cambridge University Press,339Kennett B L N,Engdahl E R. 1991.Traveltimes for global earthquake location and phase identification.Geophys J Intl,10 5:4 2 9～ 4 6 5
Lay T,Giveva J W,Kanamori H. 1982 . Long period m echanism of the 8N ovember 1980 Eureka,California,earthquake.Bull Seism Soc Amer,72 :4 39～ 4 56
Mc Cowan D W. 1976 . Momenttensorrepresentation of surface wave sources. Geophys J astr Soc,4 4 :595～ 599
Mendiguren J. 1977. Inversion of surface wave data in source mechanism study. J Geophys Res,82 :889～ 894
Rom anowicz B. 1982 .Mom enttensor inversion of long period Rayleigh waves:a new approach.J Geophys Res,87:5395～ 54 0 7
Stein R S,Barka A A,Dieterich JH. 1997.Progressivefailureon the North- A natolian faultsince1939by earthquakestresstriggering. Geophys J Intl,12 8:594～ 6 0 4
Stum p B W,Johnson L R. 1977. The determination of source properties by the linearinversion of seism ograms. Bull SeismSoc Amer,6 7:14 89～ 150 2
Stum p B W,Johnson L R. 1984 . Near- field source characterization of contained nuclear explosions in tuff. Bull Seism SocAmer,74
傅昌洪 ,沈繁銮 ,吴德珍 ,等 . 1996 .北部湾 6 .1,6 .2级地震的震源参数和 QP值特征 .华南地震 ,16 ( 3) :6 4～ 71
罗振暖 ,胡瑞贺 ,李纯清 . 1996 .北部湾地震的动力学参数与应力场 .华南地震 ,16 ( 3) :72～ 76
倪江川 ,陈运泰 ,王鸣 ,等 . 1991.云南禄劝地震部分余震的矩张量反演 .地震学报 ,13( 4) :4 12～ 4 19
吴忠良 ,陈运泰 ,倪江川 ,等 . 1994 .近震源宽频带记录的地震矩张量反演 .地震学报 ,16 ( 2 ) :14 1～ 152
吴时平 ,王林 ,黄妙影 . 1996 .北部湾 6 .1,6 .2级地震序列特征 .华南地震 ,16 ( 3) :58～ 6 3
许力生 . 1995.地震破裂时空过程的研究 :[学位论文 ] .北京 :国家地震局地球物理研究所 ,18～ 19
尹克坚 ,吴时平 ,王林 . 1996 .北部湾地震的震源机制及地震地质条件 .华南地震 ,16 ( 3) :77～ 81
Aki K ,Richard P G.1980 .Quantitative Seismology:Theory and Methods.Vols 1and 2 .San Francisco:W H Freeman,932Aki K,Patton H. 1978. Determination of seismic momenttensorusing surface waves. Tectonophysics,4 9:2 13～ 2 2 2
Bouchon M. 1981.A sim plem ethod to calculate Green′sfunctionsforelasticlayered media.Bull Seism Soc Amer,71:959～971
Caskey S J,Wesnousky S G.1997.Static stress changes and earthquake triggering during the 1954 Fairview Peak and DixieV alley earthquake,central Nevada.Bull Seism Soc Amer,87:52 1～ 52 7
Deng J,Sykes L R.1997a.Evolution of stress field in southern California and triggering ofm oderate- size earthquake:a2 0 0 -year perspective. J Geophys Res,10 2 :9859～ 9886
Deng J,Sykes L R. 1997b. Stressevolution in southern California and trigging of moderate- ,small- ,and micro- size earth-quake. J Geophys Res,10 2 :2 4 4 11～ 2 4 4 35
Dziewonski A M,Chou T- A ,Woodhouse JH.1981. Determ ination of earthquake source param etersfrom waveform data forstudies of global and regional seismicity. J Geophys Res,86 :2 82 5～ 2 852
Fitch T J,N orth R G,Sields M W. 1981.Focal depth and momenttensorrepresentation of shallow earthquakes associatedw ith the great Sumba earthquake.J Geophys Res,86 :9357～ 9374
Gilbert F. 1970 . Excitation of the normal modes of the Earth by earthquake sources. Geophys J R astr Soc,2 2 :2 2 3～ 2 2 6
Gilbert F,Dziewonski A M. 1975. An application of normal m ode theory to the retrieval of structural parameters and sourcem echanisms from seism ic spectra. Phil Trans R Soc London,A2 78:187～ 2 6 9
Gom berg J,Blanpied M L,Beeler N M. 1997. Transient triggering of near and distantearthquakes.Bull Seism Soc Amer,87:2 94～ 30 9
Helmberger D V. 196 8.The crust- mantle transition in the Bering Sea.Bull Seism Soc Amer,58:179～ 2 14
Kanam ori H,Given JW. 1981.U se of long period surface waves for rapid determination of the earthquake source parame-ters. Phys Earth Planet Inter,2 7:8～ 31
Kennett B L N,Kerry N J. 1979. Seismic waves in a stratified half space. Geophys J R astr Soc,57:557～ 583
Kennett B L N. 1980 . Seism ic wavesin a stratified half space II.Theoretical seismograms. Geophys J R astr Soc,6 1:1～ 10
Kennett B L N. 1983. Seismic Wave Propagation in Stratified Media. Cam bridge:Cambridge University Press,339Kennett B L N,Engdahl E R. 1991.Traveltimes for global earthquake location and phase identification.Geophys J Intl,10 5:4 2 9～ 4 6 5
Lay T,Giveva J W,Kanamori H. 1982 . Long period m echanism of the 8N ovember 1980 Eureka,California,earthquake.Bull Seism Soc Amer,72 :4 39～ 4 56
Mc Cowan D W. 1976 . Momenttensorrepresentation of surface wave sources. Geophys J astr Soc,4 4 :595～ 599
Mendiguren J. 1977. Inversion of surface wave data in source mechanism study. J Geophys Res,82 :889～ 894
Rom anowicz B. 1982 .Mom enttensor inversion of long period Rayleigh waves:a new approach.J Geophys Res,87:5395～ 54 0 7
Stein R S,Barka A A,Dieterich JH. 1997.Progressivefailureon the North- A natolian faultsince1939by earthquakestresstriggering. Geophys J Intl,12 8:594～ 6 0 4
Stum p B W,Johnson L R. 1977. The determination of source properties by the linearinversion of seism ograms. Bull SeismSoc Amer,6 7:14 89～ 150 2
Stum p B W,Johnson L R. 1984 . Near- field source characterization of contained nuclear explosions in tuff. Bull Seism SocAmer,74
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