利用P波初动及振幅比初步计算2005年11月26日九江―瑞昌地震余震震源机制

英文篇名：Focal Mechanism Solution of the Aftershocks of Jiujiang-Ruichang Earthquake on Nov.26,2005 by Using P Wave First Motion and S/P Amplitude Ratio
中文刊名：华南地震
英文刊名：South China Journal of Seismology
作者：杨中书 ; 李超
英文作者：YANG Zhongshu1 ; LI Chao2(1.The School of Earth and Space Sciences ; University of Science and Technology of China ; Hefei 230026 ; China ; 2.Earthquake Administration of Jiangxi Province ; Nanchang 330039 ; China)
中文关键词：震源机制 ; P波初动 ; 振幅比 ; 九江—瑞昌地震
英文关键词：Focal mechanism ; P wave first motion ; Amplitude ratio ; The Jiujiang-Ruichang earthquake
出版日期：2006-09-30
机构：中国科技大学地球与空间科学学院,江西省地震局安徽合肥230026,江西南昌3300391
年：2006
期：03
出版单位：华南地震

摘要

应用Jeanne L.Hardebeck和Peter M.Shearer编制的利用P波初动和振幅比计算地震震源机制解的程序,使用九江—瑞昌流动地震台观测的地震资料,初步计算了九江—瑞昌地震余震的震源机制;并对单独利用P波初动和利用初动及振幅比这两种计算方法进行了比较。综合最优计算结果,九江—瑞昌地震余震震源机制解为:走向174°,倾角62°,滑动角43°。
The focal mechanism solution of the aftershocks of Jiujiang-Ruichang earthquake occurred on Nov.26,2005 is calculated by using the seismic wave data of the Jiujiang-Ruichang motion seismograph network based on the soft package of focal mechanism solution combining the first motion and S/P amplitude ratio,which is developed by professor Jeanne and Peter M.The results obtained are compared with those got only by P first motion.It shows that the focal mechanism of the aftershocks is strike 1740,dip angle 620 and slip angle 430 referenced to scientific expedition of the earthquake and the average result.

引文

[1]吴大铭,王培德,陈运泰.用SH波和P波振幅比确定震源机制解.地震学报.1989,11(3):275-276.
    [2]付淑芳,刘宝城,李文艺.地震学教程(下册)[M].北京:地震出版社,1980,59-983.
    [3]刘杰,郑斯华,康英.利用P波和S波的初动和振幅比计算中小地震的震源机制解[J].地震,2004,24(1):20-26.
    [4]Hardebeck,Jeanne L.and Peter M.Shearer,A new method for determining-rstmotion focal mechanisms[J].Bulletin ofthe Seismological Society of America,2002,92:2264-2276,2002.
    [5]华祥文.唐山强震前后北京、天津周围地区应力场的变化过程[J].地震学报,1980,2(2):67-72.
    [6]笠原庆一.地震力学[M].北京:地震出版社,1984,28-49.
    [7]徐果明,周蕙兰.地震学原理[M].北京:科学出版社.1982.141-143,289.
    [8]陈祥熊,林树,李祖宁,等.福建—台湾地区一维地壳速度结构的初始模型[J].地震,2005,25(2):61-63.
    [9]高星,王卫发,姚振兴.中国及邻近地区地壳结构[J].地球物理学报,2005,48(3):593-598.
    [10]郑圻森,朱介寿,宣瑞卿,等.华南地区地壳速度结构分析[J].沉积与特提斯地质,2003,23(4):10-12.
    [11]Hardebeck,Jeanne L.and Peter M.Shearer.Using S/P Amplitude Ratios to Constrain the Focal Mechanisms of SmallEarthquakes[J].Bulletin of the Seismological Society of America.2003,93:2434-2444.
    [12]Ebel,J.The effect of crustal scattering on observed high-frequency earthquake seismograms[J].Geophys.J.R.Astr.Soc.1989,98:329–341.
    [13]郑栋,曾新福,刘吉夫,等.江西省地震局.九江—瑞昌5.7级地震现场科学考察报告[R].2006.13-15.