反投影远震P波记录法在1996年丽江7.0级地震破裂过程中的运用
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摘要
选取1996年丽江7.0级地震27个台站的地震记录,运用反投影远震P波记录法对该次地震的破裂过程进行研究。结果显示丽江7.0级地震震源破裂主要沿北南向的玉龙雪山东麓断裂发展,震源破裂时间约为30s,空间破裂尺度约40km。表明反投影远震P波记录法能在震后较短时间内得到震源破裂过程,可为地震速报工作提供重要补充,从而为震后应急救援工作提供依据。
Selecting waveforms recorded by 27 stations and using back-projection of teleseismic P-waves method,we study the source rupture process of the Lijiang M7.0 earthquake in 1996.The results show that the energy of source rupture of Lijiang M7.0 earthquake mainly releases along north-westward Eastern Piedmont Fault of Yulong Snow Mountain.The total rupture time is about 30 sec,and the rupture length is about 40 km.This method can obtain the source rupture process in short time after the earthquake occurred,it can be an important addition to earthquake rapid report and provides basis for the earthquake rapid response and rescue.
Selecting waveforms recorded by 27 stations and using back-projection of teleseismic P-waves method,we study the source rupture process of the Lijiang M7.0 earthquake in 1996.The results show that the energy of source rupture of Lijiang M7.0 earthquake mainly releases along north-westward Eastern Piedmont Fault of Yulong Snow Mountain.The total rupture time is about 30 sec,and the rupture length is about 40 km.This method can obtain the source rupture process in short time after the earthquake occurred,it can be an important addition to earthquake rapid report and provides basis for the earthquake rapid response and rescue.
引文
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皇甫岗.1997.1996年2月3日云南丽江7.0级地震[J].地震研究,20(1):1-8.
马淑田,姚振兴,纪晨.1998.1996年2月3日云南丽江地震双重破裂的初步估计及其相关问题研究[J].地震学报,20(1):18-28.
秦嘉政,刘祖荫,张俊伟.1997.用地震标定律研究丽江7.0级地震的破裂过程[J].地震研究,20(1):47-57.
徐彥，苏有锦，张俊伟.2011.反投影全球子台网P波记录研究2010年4月14日玉树地震破裂过程[J].地球物理学报,54(5):1-8.
许力生,陈运泰,Fasthoff S.1997.1996年2月3日云南丽江MS=7.0地震震源过程的时空复杂性[C].见:陈运泰.中国地震学研究进展—庆贺谢毓寿教授八十寿辰.北京:地震出版社.91-105.
张建国,周瑞琦,吴伯黔,等.1997.丽江7.0级地震地表破裂与形变特征[J].地震研究,20(1):58-65.
Dziewonski A M,Andeeson D L.1981.Preliminary reference Earth model(PREM)[J].PhysEarth Planet Int,25:297-356.
D'Amico S,Koper K D,Herrmann R B,et al.2010.maging the rupture ofthe MW6.3April6,2009L'Aquila,Italy earthquake using back-projection of teleseismic P-waves[J].Geophys Res Lett,37:L03301,doi:10.1029/2009GL042156.
Ishii M,Shearer P,Houston H,et al.2005.Extent,duration and speed ofthe2004Sumatra-Andamann earthquake imaged by the Hi-Net array[J].Nature,435:933-936.
Kaema T,Ringdal F.1999.Seismic threshold monitoring for continuousassessment of global detection capability[J].BSSA,89:946-959.
Kennett B L N,Engdahl E R.1991.Travel times for global earthquake location and phase indentification[J].Geophys J Int,122:429-465.
Kennett B L N,Engdahl E R.1995.Buland R.Constraints on seismic velocities in the earth from travel times[J].Geophys J Int,122:108124.
VanDecar J C,Crosson R.1990.Determination of teleseismic relative arrival times using multi-channel cross-correlation and least squares[J].BSSA,80:150-159.
XU Y,Keith D,Koper,OnerSufri,et al.2009.Rupture imaging of theMW7.912May2008Wenchuan earthquake from back projection ofteleseismic P waves[J].Geochemstry Geophysics Geosysterms,ISSN:1525-2027.
韩竹军,虢顺民,向宏发,等.2004.1996年2月3日云南丽江7.0级地震发生的构造环境[J]。地震学报,26(4):410-418.
皇甫岗.1997.1996年2月3日云南丽江7.0级地震[J].地震研究,20(1):1-8.
马淑田,姚振兴,纪晨.1998.1996年2月3日云南丽江地震双重破裂的初步估计及其相关问题研究[J].地震学报,20(1):18-28.
秦嘉政,刘祖荫,张俊伟.1997.用地震标定律研究丽江7.0级地震的破裂过程[J].地震研究,20(1):47-57.
徐彥，苏有锦，张俊伟.2011.反投影全球子台网P波记录研究2010年4月14日玉树地震破裂过程[J].地球物理学报,54(5):1-8.
许力生,陈运泰,Fasthoff S.1997.1996年2月3日云南丽江MS=7.0地震震源过程的时空复杂性[C].见:陈运泰.中国地震学研究进展—庆贺谢毓寿教授八十寿辰.北京:地震出版社.91-105.
张建国,周瑞琦,吴伯黔,等.1997.丽江7.0级地震地表破裂与形变特征[J].地震研究,20(1):58-65.
Dziewonski A M,Andeeson D L.1981.Preliminary reference Earth model(PREM)[J].PhysEarth Planet Int,25:297-356.
D'Amico S,Koper K D,Herrmann R B,et al.2010.maging the rupture ofthe MW6.3April6,2009L'Aquila,Italy earthquake using back-projection of teleseismic P-waves[J].Geophys Res Lett,37:L03301,doi:10.1029/2009GL042156.
Ishii M,Shearer P,Houston H,et al.2005.Extent,duration and speed ofthe2004Sumatra-Andamann earthquake imaged by the Hi-Net array[J].Nature,435:933-936.
Kaema T,Ringdal F.1999.Seismic threshold monitoring for continuousassessment of global detection capability[J].BSSA,89:946-959.
Kennett B L N,Engdahl E R.1991.Travel times for global earthquake location and phase indentification[J].Geophys J Int,122:429-465.
Kennett B L N,Engdahl E R.1995.Buland R.Constraints on seismic velocities in the earth from travel times[J].Geophys J Int,122:108124.
VanDecar J C,Crosson R.1990.Determination of teleseismic relative arrival times using multi-channel cross-correlation and least squares[J].BSSA,80:150-159.
XU Y,Keith D,Koper,OnerSufri,et al.2009.Rupture imaging of theMW7.912May2008Wenchuan earthquake from back projection ofteleseismic P waves[J].Geochemstry Geophysics Geosysterms,ISSN:1525-2027.
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