汶川M_S8.0巨震产生的完全库仑破裂应力变化及其强余震群
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摘要
计算和研究了2008年5月12日四川汶川MS8.0巨震在其强余震断层面上产生的完全库仑破裂应力变化,分析了该变化对强余震的动态和静态应力触发作用。结果显示,汶川主震后15天内发生的7次MW≥5.5强余震均受到了动态和静态库仑破裂应力的综合触发作用。
We calculate and study the complete Coulomb failure stress changes caused by the 2008 MS8.0 Wenchuan,Sichuan,earthquake,and analyze the dynamic and static stress triggering effects on seven strong aftershocks.The results show that the seven strong aftershocks that occurred during 15 days after the Wenchuan main shock are all subjected to the triggering effects of both dynamic and static Coulomb stresses.
We calculate and study the complete Coulomb failure stress changes caused by the 2008 MS8.0 Wenchuan,Sichuan,earthquake,and analyze the dynamic and static stress triggering effects on seven strong aftershocks.The results show that the seven strong aftershocks that occurred during 15 days after the Wenchuan main shock are all subjected to the triggering effects of both dynamic and static Coulomb stresses.
引文
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Bouchon M·2003·A Review of the Discrete Wavenumber Method[J].Pure Appl·Geophys,160(3-4):445-465·
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Parsons T A·2005·A hypothesis for delayed dynamic earthquake trigge-ring[J].Geophysical Research Letters,32,L04302·
Perniola B,Bressan G,Pondrelli S·2004·Changes in failure stress andstress transfer during the1976-77Friuli earthquake sequence[J].Geophys·J·Int·,156(2):297-306·
Robinson R,Zhou S·2005·Stress Interactions within the Tangshan,China,Earthquake Sequence of1976[J].BSSA,95(6):2501-2505·
Sebastian H·2004·Seismicity patterns of earthquake swarms due to fluidintrusion and stress triggering[J].Geophys·J·Int·,159(3):1090-1096·
Stein R S,King G C P,Jian L·1992·Change in failure stress on thesouthern San Andreas fault systemcaused by the1992M7·4Landersearthquake[J].Science,258(5086):1328-1332·
Tibi R,Wliens D A,Inoue H·2003·Remote triggering of deep earth-quakes in the2002Tonga sequences[J].Nature,424:921-925·
Wang W H,Chen C H·2001·Static stress transferred by the1999Chi-Chi,Taiwan,Earthquake:effects on the stability of the surround-ing fault systems and aftershock triggering with a3D fault-slipmodel[J].BSSA,91(5):1041-1052·
万永革,沈正康,曾跃华,等·2007·青藏高原东北部的库仑应力积累演化对大地震发生的影响[J].地震学报,29(2):115-129·
沈正康,万永革,甘卫军,等·2003·东昆仑活动断裂带大地震之间的黏弹性应力触发研究[J].地球物理学报,46(6):786-795·
万永革,吴忠良,周公威,等·2002·地震应力触发研究[J].地震学报,24(5):533-551·
傅征祥,刘桂萍,陈棋福·2001·青藏高原北缘海原、古浪、昌马大地震间相互作用的动力学分析[J].地震地质,23(1):35-42·
王二七,孟庆任,陈智,等·2001·龙门山断裂带印支期左旋走滑运动及其大地构造成因[J].地学前沿,8(2):375-384·
王椿镛,韩渭宾,吴建平,等·2003·松潘-甘孜造山带地壳速度结构[J].地震学报,25(3):229-241·
唐荣昌,韩渭宾·1993·四川活动断裂与地震[M].北京:地震出版社·
石耀霖·2001·关于应力触发和应力影区概念在地震预报中应用的一些思考[J].地震,21(3):1-7·
Anderson J G,Brune J N,Louie J N,et al·1994,Seismicity in thewestern Great Basin apparently triggered by the Landers,Califor-nia,earthquake,28June1992[J].BSSA,84(3):863-891·
Belardinelli M E,Bizzarri A,Cocco M·2003·Earthquake triggering bystatic and dynamic stress changes[J].JGR,108(B3):2135·
Bouchon M·2003·A Review of the Discrete Wavenumber Method[J].Pure Appl·Geophys,160(3-4):445-465·
Brodsky E E,Karakostas V,Kanamori H·2000·A new observation ofdynamically triggered regional seismicity:Earthquake in Greece fol-lowing the August,1999Izmit,Turkey earthquake[J].Geophys·Res·Lett·,27:2741-2744·
Gomberg J,Blanpied M L,Beeler N M·1997·Transient triggering ofnear and distant earthquakes[J].BSSA,87(2):294-309·
Gomberg J,Reasenberg P A,Bodin P,et al·2001·Earthquake trigge-ring by seismic waves following the Landers and Hector Mine earth-quakes[J].Nature,411:462-466·
Harris R A,Simpson R W,Reasenberg P A·1995·Influence of staticstress changes on earthquake location in southern California[J].Natrue,375:221-224·
Harris R A·1998·Introduction to special section:Stress triggers,stressshadows,and implications for seismic hazard[J].JGR,103(B10):24347-24358·
Hill D P,Reasenberg P A,Michael A,et al·1993·Seismicity remotelytriggered by the magnitude7·3Landers,California,earthquake[J].Science,260(5114):1617-1622·
Kilb D,Gomberg J,Bodin P·2000·Triggering of earthquake aftershocksby dynamic stresses[J].Nature,408:570-574·
Kilb D·2003·A strong correlation between induced peak dynamic Cou-lomb stress change fromthe1992M7·3Landers,California,earth-quake and the hypocenter of the1999M7·1Hector Mine,Califor-nia,earthquake[J].JGR,108(B1):2012·
Kilb D,Gomberg J,Bodin P·2002·Aftershock triggering by completeCoulomb stress changes[J].JGR,107(B4):2060·
Parsons T A·2005·A hypothesis for delayed dynamic earthquake trigge-ring[J].Geophysical Research Letters,32,L04302·
Perniola B,Bressan G,Pondrelli S·2004·Changes in failure stress andstress transfer during the1976-77Friuli earthquake sequence[J].Geophys·J·Int·,156(2):297-306·
Robinson R,Zhou S·2005·Stress Interactions within the Tangshan,China,Earthquake Sequence of1976[J].BSSA,95(6):2501-2505·
Sebastian H·2004·Seismicity patterns of earthquake swarms due to fluidintrusion and stress triggering[J].Geophys·J·Int·,159(3):1090-1096·
Stein R S,King G C P,Jian L·1992·Change in failure stress on thesouthern San Andreas fault systemcaused by the1992M7·4Landersearthquake[J].Science,258(5086):1328-1332·
Tibi R,Wliens D A,Inoue H·2003·Remote triggering of deep earth-quakes in the2002Tonga sequences[J].Nature,424:921-925·
Wang W H,Chen C H·2001·Static stress transferred by the1999Chi-Chi,Taiwan,Earthquake:effects on the stability of the surround-ing fault systems and aftershock triggering with a3D fault-slipmodel[J].BSSA,91(5):1041-1052·
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