中国西部地区震源破裂尺度与震级的经验关系
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摘要
为了获得震源地下破裂尺度与震级的经验关系,搜集了12个中国西部地区强震的震源反演获得的地下破裂尺度,并且与通过余震分布获得的破裂尺度进行比较,得到了反演获得的震源破裂尺度小于据余震分布得到的破裂尺度的结论;并通过最小二乘法线性回归建立了震源破裂尺度L与面波震级MS的经验关系式:lg L=0.635Ms-2.8084;δ(lg L=0.64);本文的经验关系在震级较小时与Wells等(1994)的经验关系较为接近,在震级较大时与龙锋等(2006)建立的中国华北地区的经验关系接近。将本文经验关系与冉洪流(2011)建立的中国西部地区走滑断层的地表破裂尺度与震级的经验关系进行比较,验证了地表破裂尺度比震源地下破裂尺度小的结论。通过各种比较,本文提出了需要更多的反演地下破裂尺度的数据来得到更为准确的经验关系的建议。
In order to get the empirical relationship between subsurface rupture length and earthquake magnitude of western China, the related data of 12 earthquakes which occurred on the west of China was collected. Rupture length of these earthquakes from inversion is larger than that from distribution of aftershock. The relationship L-MS is rebuilt by using of the least squares method:lg L= 0.635 Ms-2.8084;δ(lg L=0.64).This regression relationship is close to Wells' work(2002)on small magnitude while close to the relationship of north China from Long Feng's work(2006)on large magnitude. After comparing to the relationship between surface rupture length and earthquake magnitude of western region of China which is rebuilt by Ran Hongliu(2011), we confirmed that surface rupture length is shorter than subsurface rupture length. Finally, we proposed that more study on subsurface rupture length is needed in order to build the more accurate relationship in future.
In order to get the empirical relationship between subsurface rupture length and earthquake magnitude of western China, the related data of 12 earthquakes which occurred on the west of China was collected. Rupture length of these earthquakes from inversion is larger than that from distribution of aftershock. The relationship L-MS is rebuilt by using of the least squares method:lg L= 0.635 Ms-2.8084;δ(lg L=0.64).This regression relationship is close to Wells' work(2002)on small magnitude while close to the relationship of north China from Long Feng's work(2006)on large magnitude. After comparing to the relationship between surface rupture length and earthquake magnitude of western region of China which is rebuilt by Ran Hongliu(2011), we confirmed that surface rupture length is shorter than subsurface rupture length. Finally, we proposed that more study on subsurface rupture length is needed in order to build the more accurate relationship in future.
引文
成尔林,林邦慧,庞明虎,李桂芳,1983.1981年1月24日道孚6.9级地震的震源参数.地球物理学报,26 (2):140—148.
邓起东,于贵华,叶文华,1992.地震地表破裂参数与震级关系的研究.见:国家地震局地质研究所编,活动断裂研究(2).北京:地震出版社,247—264.
董瑞树,冉洪流,高铮,1993.中国大陆地震震级和地震活动断层长度的关系讨论.地震地质,15(4):395—400.
房桂荣,周慧兰,1986.1976年8月22日松潘6.7级地震的破裂机制.中国地震,2(1):75—78.
蒋海昆,郑建常,吴琼,曲延军,李永莉,代磊,2007.中国大陆中强以上地震余震分布尺度的统计特征.地震学报,29(2):151—164.
李忠华,苏有锦,蔡明军,张俊伟,刘祖荫,1999.云南地区震源破裂长度与震级的经验关系.西北地震学报,21(3):331—333.
龙锋,闻学泽,徐锡伟,2006.华北地区地震活断层的震级—破裂长度、破裂面积的经验关系.地震地质,28 (4):511—535.
秦嘉政,叶建庆,钱晓东,李白基,王绍晋,2003.2000年姚安地震的震源参数.地球物理学报,46(5):633 —641.
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.地震研究,20(1):47—57.
冉洪流,2011.中国西部走滑型活动断裂的地震破裂参数与震级的经验关系.地震地质,33(3):577—585.
汪进,秦保燕,董奇珍,1992.1986年8月26日门源6.4级地震破裂过程研究.华北地震科学,10(2):25 —33.
闻学泽,1995.活动断裂地震潜势的定量评估.北京:地震出版社.
吴忠良,陈运泰,1998.用经验格林函数方法研究澜沧-耿马MS=7.6地震的破裂过程.地震学报,20(1):1 —11.
许力生,陈运泰,1999.1997年中国西藏玛尼MS7.9地震的时空破裂过程.地震学报,21(5):449—459.
许力生,陈运泰,2004.从全球长周期波形资料反演2001年11月14日昆仑山口地震时空破裂过程.中国科学(D辑):地球科学,34(3):256—264.
赵翠萍,陈章立,郑斯华,刘杰,2005.2003年9月27日中、俄、蒙边界MS7.9级地震震源机制及破裂过程研究.地震学报,27(3):237—249.
张勇,冯万鹏,许力生,周成虎,陈运泰,2008a.2008年汶川大地震的时空破裂过程.中国科学(D辑):地球科学,38(10):1186—1194.
张勇,许力生,陈运泰,冯万鹏,杜海林,2008b.2007年云南宁洱MS6.4地震震源过程.中国科学(D辑):地球科学,38(6):683—692.
张勇,许力生,陈运泰,2010.2010年4月14日青海玉树地震破裂过程快速反演.地震学报,32(3):361—365.
张裕明,1987.根据活断层长度、盆地面积估计最大震级:以华北为例.见:现代地壳运动研究(3).北京:地震出版社,142—146.
周云好,陈章立,缪发军,2004.2001年11月14日昆仑山口西MS8.1地震震源破裂过程研究.地震学报,26 (增刊):9—20.
Darragh R.B.,Bolt B.A.,1987.A comment on the statistical regression relation between earthquake magnitude and fault rupture length.Bulletin of Seismological Society of America,77(4):1479—1484.
Dietg L.D.,Ellsworth W.L.,1990.The October 17,1989,Loma Prieta,California,earthgualee and its aftershochs:feometry of the seguence from high-resolution locations Geophys res letts.17:1417—1420.
Dowrick D.J.and Rhoades D.A.,2004.Relation between earthquake magnitude and fault rupture dimensions:how regionally variable are they?Bulletin of Seismological Society of America,94(3):766—788.
Papazachos B.C.,Scordilis E.M.,Panagiotopoulos D.G.,Papazachos C.B.,Karakaisis G.F,2004.Global relations between seismic fault parameters and moment magnitude of earthquakes.Bulletin of Geological Society of Greece,36:1482—1489.
Slemmos D.B.,1977.Faults and earthquake magnitude.State-of-the-art for assessing earthquake hazards in the United States,report 6.
Tocher D.,1958.Earthquake energy and ground breakage.Bull.Seism.Soc.Am.,48:147—153.
Wells D.L.,Coppersmith K.J.,1994.New empirical relationships among magnitude,rupture length,rupture width,rupture area,and surface displacement.Bulletin of Seismological Society of America,84(4):974—1002.
邓起东,于贵华,叶文华,1992.地震地表破裂参数与震级关系的研究.见:国家地震局地质研究所编,活动断裂研究(2).北京:地震出版社,247—264.
董瑞树,冉洪流,高铮,1993.中国大陆地震震级和地震活动断层长度的关系讨论.地震地质,15(4):395—400.
房桂荣,周慧兰,1986.1976年8月22日松潘6.7级地震的破裂机制.中国地震,2(1):75—78.
蒋海昆,郑建常,吴琼,曲延军,李永莉,代磊,2007.中国大陆中强以上地震余震分布尺度的统计特征.地震学报,29(2):151—164.
李忠华,苏有锦,蔡明军,张俊伟,刘祖荫,1999.云南地区震源破裂长度与震级的经验关系.西北地震学报,21(3):331—333.
龙锋,闻学泽,徐锡伟,2006.华北地区地震活断层的震级—破裂长度、破裂面积的经验关系.地震地质,28 (4):511—535.
秦嘉政,叶建庆,钱晓东,李白基,王绍晋,2003.2000年姚安地震的震源参数.地球物理学报,46(5):633 —641.
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.地震研究,20(1):47—57.
冉洪流,2011.中国西部走滑型活动断裂的地震破裂参数与震级的经验关系.地震地质,33(3):577—585.
汪进,秦保燕,董奇珍,1992.1986年8月26日门源6.4级地震破裂过程研究.华北地震科学,10(2):25 —33.
闻学泽,1995.活动断裂地震潜势的定量评估.北京:地震出版社.
吴忠良,陈运泰,1998.用经验格林函数方法研究澜沧-耿马MS=7.6地震的破裂过程.地震学报,20(1):1 —11.
许力生,陈运泰,1999.1997年中国西藏玛尼MS7.9地震的时空破裂过程.地震学报,21(5):449—459.
许力生,陈运泰,2004.从全球长周期波形资料反演2001年11月14日昆仑山口地震时空破裂过程.中国科学(D辑):地球科学,34(3):256—264.
赵翠萍,陈章立,郑斯华,刘杰,2005.2003年9月27日中、俄、蒙边界MS7.9级地震震源机制及破裂过程研究.地震学报,27(3):237—249.
张勇,冯万鹏,许力生,周成虎,陈运泰,2008a.2008年汶川大地震的时空破裂过程.中国科学(D辑):地球科学,38(10):1186—1194.
张勇,许力生,陈运泰,冯万鹏,杜海林,2008b.2007年云南宁洱MS6.4地震震源过程.中国科学(D辑):地球科学,38(6):683—692.
张勇,许力生,陈运泰,2010.2010年4月14日青海玉树地震破裂过程快速反演.地震学报,32(3):361—365.
张裕明,1987.根据活断层长度、盆地面积估计最大震级:以华北为例.见:现代地壳运动研究(3).北京:地震出版社,142—146.
周云好,陈章立,缪发军,2004.2001年11月14日昆仑山口西MS8.1地震震源破裂过程研究.地震学报,26 (增刊):9—20.
Darragh R.B.,Bolt B.A.,1987.A comment on the statistical regression relation between earthquake magnitude and fault rupture length.Bulletin of Seismological Society of America,77(4):1479—1484.
Dietg L.D.,Ellsworth W.L.,1990.The October 17,1989,Loma Prieta,California,earthgualee and its aftershochs:feometry of the seguence from high-resolution locations Geophys res letts.17:1417—1420.
Dowrick D.J.and Rhoades D.A.,2004.Relation between earthquake magnitude and fault rupture dimensions:how regionally variable are they?Bulletin of Seismological Society of America,94(3):766—788.
Papazachos B.C.,Scordilis E.M.,Panagiotopoulos D.G.,Papazachos C.B.,Karakaisis G.F,2004.Global relations between seismic fault parameters and moment magnitude of earthquakes.Bulletin of Geological Society of Greece,36:1482—1489.
Slemmos D.B.,1977.Faults and earthquake magnitude.State-of-the-art for assessing earthquake hazards in the United States,report 6.
Tocher D.,1958.Earthquake energy and ground breakage.Bull.Seism.Soc.Am.,48:147—153.
Wells D.L.,Coppersmith K.J.,1994.New empirical relationships among magnitude,rupture length,rupture width,rupture area,and surface displacement.Bulletin of Seismological Society of America,84(4):974—1002.
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