芦山地震断层滑动速度的计算
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摘要
以往得到的断层滑动速度函数要么是通过理论研究获得的,要么是计算的结果与地壳介质等因素有关.由于目前人们对地壳介质和震源机制研究的局限性,使得计算结果的准确性不高.在系统提出用多普勒效应计算断层滑动速度函数的基础上,以芦山地震余震为例计算了地震断层的滑动速度函数.结果表明:滑动速度函数具有迅速上升,相对缓慢下降的特点,与我们以往的计算结果一致,也与Hisada的研究结果一致.用多普勒效应计算断层断层滑动速度函数的结果与地壳介质和震源机制无关,应该是一种有前途的计算地震断层滑动速度的方法.
The fault sliding velocity function was acquired either from theory or from computational results that have something to do with crust medium and other factor. Limitations that people understand the crust medium and source mechanism make accuracy of computational results low. On the basis of our systemic method that computes fault sliding velocity function with Doppler effect,fault sliding velocity function of Lushan aftershock is calculated.Computational results show fault sliding velocity function has characteristic that velocity raises rapidly,and descends slowly,these results are identical with our computation before,and identical with Hisada. The computational results by Doppler effect have nothing to do with the crust medium and source mechanism,so this method is effective to calculate fault sliding velocity function.
The fault sliding velocity function was acquired either from theory or from computational results that have something to do with crust medium and other factor. Limitations that people understand the crust medium and source mechanism make accuracy of computational results low. On the basis of our systemic method that computes fault sliding velocity function with Doppler effect,fault sliding velocity function of Lushan aftershock is calculated.Computational results show fault sliding velocity function has characteristic that velocity raises rapidly,and descends slowly,these results are identical with our computation before,and identical with Hisada. The computational results by Doppler effect have nothing to do with the crust medium and source mechanism,so this method is effective to calculate fault sliding velocity function.
引文
Anderson J G,Richards P G.1975.Comparison of strong ground motion from several dislocation models[J].Geophysical Journal International,42(2):347-373.
Boore D M.2003.Simulation of ground motion using the stochastic method[J].Pure Appl.Geophys.,160(3-4):635-676.
Dreger D S.1994a.Empirical Green’s function study of the January 17,1994 Northridge,California earthquake[J].Geophys.Res.Lett.,21(24):2633-2636.
Dreger D S.1994b.Investigation of the rupture process of the 28 June1992 Landers earthquake utilizing TERRAscope[J].Bulletin of the Seismological Society of America,84(3):713-724.
Hisada Y.2001.A theoretical omega-square model considering spatial variation in slip and rupture velocity.Part 2:Case for a twodimensional source model[J].Bulletin of the Seismological Society of America,91(4):651-666.
Li Q C.2010.Research on ground motion simulation with empirical Green’s function method(in Chinese)[Ph.D.thesis].Harbin:Institute of Engineering Mechanics,China Earthquake Administration.
Li Q C,Zhang J.2014.The calculation of fault sliding velocity function in Wenchuan aftershock with Doppler effect[J].Progress in Geophysics(in Chinese),29(2):505-511,doi:10.6038/pg20140205.
Li Q C,Yan X D,Sun Y C,et al.2016.Study on fault sliding velocity[J].Progress in Geophysics(in Chinese),31(1):442-448,doi:10 .6038/pg20160152.
Li S Q,Chen Q F,Zhao L,et al.2013.Anomalous focal mechanism of the May 2011 Mw5.7 deep earthquake in northeastern China:Regional waveform inversion and possible mechanism[J].Chinese Journal of Geophysics(in Chinese),56(9):2959-2970,doi:10.6038/cjg20130910.
Ni J C,Chen Y T,Wang M,et al.1991.Moment tensor inversion of some aftershocks of the April 18,1985,Luquan,Yunnan,China,Earthquake[J].Acta Seismologica Sinica(in Chinese),13(4):412-419.
Ouyang X Y,Zhang W B,Zhang Y B.2009.Estimation on site effect from different techniques using aftershocks of Chi-Chi earthquake[J].Journal of the Graduate School of the Chinese Academy of Sciences(in Chinese),26(3):373-382.
Wang W M,Zhao L F,Li J,et al.2008.Rupture process of the MS8.0 Wenchuan earthquake of Sichuan,China[J].Chinese Journal of Geophysics(in Chinese),51(5):1403-1410,doi:10.3321/j.issn:0001-5733.2008.05.013.
Xu L S,Chen Y T.1996.Source time function extraction of Gonghe earthquake using Green function method from long period digital waveform data[J].Acta Seismologica Sinica(in Chinese),18(2):156-169.
Zhang Y,Xu L S,Chen Y T.2009.Spatio—temporal variation of the source mechanism of the 2008 great Wenchuan earthquake[J].Chinese Journal of Geophysics(in Chinese),52(2):379-389.
Zhou H,Feng G C,Li Z W,et al.2013.The fault slip distribution of the Myanmar MW6.8 inferred from INSAR measurements[J].Chinese Journal of Geophysics(in Chinese),56(9):3011-3021,doi:10.6038/cjg20130914.
Zhou J Y,Chen Y T,Ni J C,et al.1993.To determine the source time function of small earthquakes by the empirical Green function[J].Acta Seismologica Sinica(in Chinese),15(1):22-31.
李启成.2010.经验格林函数方法模拟地震动研究[博士论文].哈尔滨:中国地震局工程力学研究所.
李启成,闫晓丹,孙颖川,等.2016.断层滑动速度的研究[J].地球物理学进展,31(1):442-448,doi:10.6038/pg20160152.
李启成,张晶.2014.用多普勒效应计算汶川余震断层滑动速度函数[J].地球物理学进展,29(2):505-511,doi:10.6038/pg20140205.
李圣强,陈棋福,赵里,等.2013.2011年5月中国东北MW5.7深震的非同寻常震源机制:区域波形反演与成因探讨[J].地球物理学报,56(9):2959-2970,doi:10.6038/cjg20130910.
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[J].地震学报,13(4):412-419.
欧阳行艳,章文波,张有兵.2009.利用集集地震余震记录分析场地地震动反应[J].中国科学院研究生院学报,26(3):373-382.
王卫民,赵连锋,李娟,等.2008.四川汶川8.0级地震震源过程[J].地球物理学报,51(5):1403-1410,doi:10.3321/j.issn:0001-5733.2008.05.013.
许力生,陈运泰.1996.用经验格林函数方法从长周期数字波形资料中提取共和地震的震源时间函数[J].地震学报,18(2):156-169.
张勇,许力生,陈运泰.2009.2008年汶川大地震震源机制的时空变化[J].地球物理学报,52(2):379-389.
周辉,冯光财,李志伟,等.2013.利用In SAR资料反演缅甸MW6.8地震断层滑动分布[J].地球物理学报,56(9):3011-3021,doi:10.6038/cjg20130914.
周家玉,陈运泰,倪江川,等.1993.用经验格林函数确定中小地震的震源时间函数[J].地震学报,15(1):22-31.
Boore D M.2003.Simulation of ground motion using the stochastic method[J].Pure Appl.Geophys.,160(3-4):635-676.
Dreger D S.1994a.Empirical Green’s function study of the January 17,1994 Northridge,California earthquake[J].Geophys.Res.Lett.,21(24):2633-2636.
Dreger D S.1994b.Investigation of the rupture process of the 28 June1992 Landers earthquake utilizing TERRAscope[J].Bulletin of the Seismological Society of America,84(3):713-724.
Hisada Y.2001.A theoretical omega-square model considering spatial variation in slip and rupture velocity.Part 2:Case for a twodimensional source model[J].Bulletin of the Seismological Society of America,91(4):651-666.
Li Q C.2010.Research on ground motion simulation with empirical Green’s function method(in Chinese)[Ph.D.thesis].Harbin:Institute of Engineering Mechanics,China Earthquake Administration.
Li Q C,Zhang J.2014.The calculation of fault sliding velocity function in Wenchuan aftershock with Doppler effect[J].Progress in Geophysics(in Chinese),29(2):505-511,doi:10.6038/pg20140205.
Li Q C,Yan X D,Sun Y C,et al.2016.Study on fault sliding velocity[J].Progress in Geophysics(in Chinese),31(1):442-448,doi:10 .6038/pg20160152.
Li S Q,Chen Q F,Zhao L,et al.2013.Anomalous focal mechanism of the May 2011 Mw5.7 deep earthquake in northeastern China:Regional waveform inversion and possible mechanism[J].Chinese Journal of Geophysics(in Chinese),56(9):2959-2970,doi:10.6038/cjg20130910.
Ni J C,Chen Y T,Wang M,et al.1991.Moment tensor inversion of some aftershocks of the April 18,1985,Luquan,Yunnan,China,Earthquake[J].Acta Seismologica Sinica(in Chinese),13(4):412-419.
Ouyang X Y,Zhang W B,Zhang Y B.2009.Estimation on site effect from different techniques using aftershocks of Chi-Chi earthquake[J].Journal of the Graduate School of the Chinese Academy of Sciences(in Chinese),26(3):373-382.
Wang W M,Zhao L F,Li J,et al.2008.Rupture process of the MS8.0 Wenchuan earthquake of Sichuan,China[J].Chinese Journal of Geophysics(in Chinese),51(5):1403-1410,doi:10.3321/j.issn:0001-5733.2008.05.013.
Xu L S,Chen Y T.1996.Source time function extraction of Gonghe earthquake using Green function method from long period digital waveform data[J].Acta Seismologica Sinica(in Chinese),18(2):156-169.
Zhang Y,Xu L S,Chen Y T.2009.Spatio—temporal variation of the source mechanism of the 2008 great Wenchuan earthquake[J].Chinese Journal of Geophysics(in Chinese),52(2):379-389.
Zhou H,Feng G C,Li Z W,et al.2013.The fault slip distribution of the Myanmar MW6.8 inferred from INSAR measurements[J].Chinese Journal of Geophysics(in Chinese),56(9):3011-3021,doi:10.6038/cjg20130914.
Zhou J Y,Chen Y T,Ni J C,et al.1993.To determine the source time function of small earthquakes by the empirical Green function[J].Acta Seismologica Sinica(in Chinese),15(1):22-31.
李启成.2010.经验格林函数方法模拟地震动研究[博士论文].哈尔滨:中国地震局工程力学研究所.
李启成,闫晓丹,孙颖川,等.2016.断层滑动速度的研究[J].地球物理学进展,31(1):442-448,doi:10.6038/pg20160152.
李启成,张晶.2014.用多普勒效应计算汶川余震断层滑动速度函数[J].地球物理学进展,29(2):505-511,doi:10.6038/pg20140205.
李圣强,陈棋福,赵里,等.2013.2011年5月中国东北MW5.7深震的非同寻常震源机制:区域波形反演与成因探讨[J].地球物理学报,56(9):2959-2970,doi:10.6038/cjg20130910.
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[J].地震学报,13(4):412-419.
欧阳行艳,章文波,张有兵.2009.利用集集地震余震记录分析场地地震动反应[J].中国科学院研究生院学报,26(3):373-382.
王卫民,赵连锋,李娟,等.2008.四川汶川8.0级地震震源过程[J].地球物理学报,51(5):1403-1410,doi:10.3321/j.issn:0001-5733.2008.05.013.
许力生,陈运泰.1996.用经验格林函数方法从长周期数字波形资料中提取共和地震的震源时间函数[J].地震学报,18(2):156-169.
张勇,许力生,陈运泰.2009.2008年汶川大地震震源机制的时空变化[J].地球物理学报,52(2):379-389.
周辉,冯光财,李志伟,等.2013.利用In SAR资料反演缅甸MW6.8地震断层滑动分布[J].地球物理学报,56(9):3011-3021,doi:10.6038/cjg20130914.
周家玉,陈运泰,倪江川,等.1993.用经验格林函数确定中小地震的震源时间函数[J].地震学报,15(1):22-31.