用地震层析成像方法研究北京西北地区的活动断裂
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摘要
利用首都圈地震台网和中-德合作延庆数字地震台阵2001年10月—2005年12月获得良好记录的197次地震到时,运用地震震源位置和三维地壳速度结构联合反演程序对这些地震实行精确定位.震源位置分布表明,北京西北地区存在两条主要的地震活动断裂带.一条从清河、温泉一带向北西方向伸展,到怀来县以北的黄土窑一带;另一条是自南口、昌平一带向北东东向伸展的活动断裂带.
Using the arrival times of 197 earthquakes well recorded by the Beijing Seismic Network and the China-Germany cooperative Yanqing Digital Seismic Array in the period from October of 2001 to December of 2005, we accurately relocate these earthquakes by the joint-inversion program for hypocentralr position and 3-D velocity structure. The distribution of hypocenters shows that there are two major seismic active belts in the northwestern Beijing. The first belt stretches from Qinghe, Wenquan to the NW direction and the second extends from Nankou, Changping to the ENE direction.
Using the arrival times of 197 earthquakes well recorded by the Beijing Seismic Network and the China-Germany cooperative Yanqing Digital Seismic Array in the period from October of 2001 to December of 2005, we accurately relocate these earthquakes by the joint-inversion program for hypocentralr position and 3-D velocity structure. The distribution of hypocenters shows that there are two major seismic active belts in the northwestern Beijing. The first belt stretches from Qinghe, Wenquan to the NW direction and the second extends from Nankou, Changping to the ENE direction.
引文
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李春来,王培德.2005.1999年11月大同地震部分余震的定位及震源机制反演[J].地震地磁观测与研究,26(2):48-55.
李文军,王培德,李春来,等.2005.近场精确定位在卢龙ML6.2地震发展震构造研究中的应用[J].地震学报,27(4):377-384
王培德,陈运泰.2001.中德合作开展流动台阵近场地震观测和北京地区防震减灾研究[J].国际地震动态,(5):8-12.
王培德,赵华,李春来,等.2002.延庆数字地震台阵及其观测新技术[J].地震地磁观测与研究,23(6):48-52.
汪素云,许忠淮,俞言祥,等.1995.北京及临近地区微震重新定位及其构造含义[J].中国地震,11(3):222-229.
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于湘伟,陈运泰,王培德.2003.京津唐地区中上地壳三维P波速度结构[J].地震学报,25(1):1-14.
杨智娴,陈运泰,郑月军,等.2003.双差地震定位法在我国中西部地区地震精确定位中的应用[J].中国科学(D辑),33(增刊):129-134.
张家茹,邵学钟,殷秀华,等.1993.深部构造背景和强震的深部孕震环境[G]∥高文学,马瑾主编.首都圈地震地质环境与地震灾害.北京:地震出版社:52-86.
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祝治平,张先康,张建狮,等.1997.北京—怀来—丰镇剖面地壳上地幔构造与速度结构研究[J].地震学报,19(5):499-505.
Eberhart-Phillips D.1986.Three-di mensional velocity structure in north California Coast Ranges frominversion of localearthquakes arrival ti mes[J].Bull Seism Soc Amer,76:1025-1052.
Husen S,Kissling E,Flueh E,et al.1999.Accurate hypocentre determinationin the seismogenic zone of the subductingNazca Plate in northern Chile using a combined on-/offshore network[J].Geophys J Int,138:687-701.
Kissling E.1988.Geotomography withlocal earthquake data[J].Rev Geophys,26:659-698.
Waldhauser F,Ellsworth WL.2000.Adouble difference earthquake location algorithm:Method and application to thenorthern Hayward fault,California[J].Bull Seism Soc Amer,90(6):1353-1368.
李春来,王培德.2005.1999年11月大同地震部分余震的定位及震源机制反演[J].地震地磁观测与研究,26(2):48-55.
李文军,王培德,李春来,等.2005.近场精确定位在卢龙ML6.2地震发展震构造研究中的应用[J].地震学报,27(4):377-384
王培德,陈运泰.2001.中德合作开展流动台阵近场地震观测和北京地区防震减灾研究[J].国际地震动态,(5):8-12.
王培德,赵华,李春来,等.2002.延庆数字地震台阵及其观测新技术[J].地震地磁观测与研究,23(6):48-52.
汪素云,许忠淮,俞言祥,等.1995.北京及临近地区微震重新定位及其构造含义[J].中国地震,11(3):222-229.
徐锡伟,吴卫民,张先康,等.2002.首都圈地区地壳最新构造变动与地震[M].北京:科学出版社:47-69,105-107.
于湘伟,陈运泰,王培德.2003.京津唐地区中上地壳三维P波速度结构[J].地震学报,25(1):1-14.
杨智娴,陈运泰,郑月军,等.2003.双差地震定位法在我国中西部地区地震精确定位中的应用[J].中国科学(D辑),33(增刊):129-134.
张家茹,邵学钟,殷秀华,等.1993.深部构造背景和强震的深部孕震环境[G]∥高文学,马瑾主编.首都圈地震地质环境与地震灾害.北京:地震出版社:52-86.
中国地震局.2005.活动断裂探测方法(DB/T15—2005)[S].北京:地震出版社:1.
朱艾斓,徐锡伟,胡平,等.2005.首都圈地区小震重新定位及其在地震构造研究中的应用[J].地质评论,51(3):268-274.
祝治平,张先康,张建狮,等.1997.北京—怀来—丰镇剖面地壳上地幔构造与速度结构研究[J].地震学报,19(5):499-505.
Eberhart-Phillips D.1986.Three-di mensional velocity structure in north California Coast Ranges frominversion of localearthquakes arrival ti mes[J].Bull Seism Soc Amer,76:1025-1052.
Husen S,Kissling E,Flueh E,et al.1999.Accurate hypocentre determinationin the seismogenic zone of the subductingNazca Plate in northern Chile using a combined on-/offshore network[J].Geophys J Int,138:687-701.
Kissling E.1988.Geotomography withlocal earthquake data[J].Rev Geophys,26:659-698.
Waldhauser F,Ellsworth WL.2000.Adouble difference earthquake location algorithm:Method and application to thenorthern Hayward fault,California[J].Bull Seism Soc Amer,90(6):1353-1368.
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