用SH波和P波振幅比确定震源机制解di
DETERMINATION OF FOCAL MECHANISM USING SH TO P AMPLITUDE RATIO
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摘要: 使用三分向数字地震仪记录的地震资料,进行了SH和P波最大振幅比的反演,求得了震源参数的最小二乘解。本文确定的1981年河北省滦县震群的震源机制解为:走向98,倾角54,滑动角——114;1982年7月云南省剑川地震的震源机制解为:走向199,倾角40,滑动角——110;1982年10月河北省卢龙地震的震源机制解为:第一条断裂,走向270,倾角65,滑动角——135;第二条断裂,走向195,倾角80,滑动角——165。Abstract: Least squares method is used to invert source parameters from data recorded by a three-component digital seismograph. It is found that the focal mechanism parameters of the September 1981 Luanxian,Hebei,earthquake swarms are: strike 98,dip 54,rake-114; that of the July 1982 Jianchuan,Yunnan,earthquake are: strike 199,dip 40,rake -110; that of the October 1982 Lulong,Hebei,earthquake are: first group,strike 270,dip 65,rake -135; second group,strike 195,dip 80,rake -165
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[1] Herrman, R. B., 1975. A student's guide to the use of P and S wave data for focal mechanism determina——tion. Earthq. Notes, 46, 4, 29——39.
[2] Kisslinger, C., 1980. Evaluation of S to P amplitude ratio for determining focal mechanisms from re——gional network observation. Bull. Seism. Soc. Amer.. 70, 999——1014.
[3] Kisslinger, C., Bowman, J. R. and Kock, K. 198 i. Procedures for computing focal mechanisms from local (SV/P)z data. Bull. Seism. Soc. Amen, 71, 1719——1729.
[4] 梁尚鸿、李幼铭、束沛锰、朱陪定,1984.利用区域地震台网p,S振幅比资料测定小震震源参数.地球物理学报,27, 249——258,
[5] 吴大铭、王培德,1986.剑川地震余震研究及剑川地震发震构造.地震研究,10,1, 29——36.
[6] Aki, K., and Richards, P. G,1980. (W antitative Seismology: Theory and Methods, Vol. 1, W. H. Freemdn, San Francisco.
[7] 王培德,1981.一种新型的数字磁带记录地震仪——DCS——302型地震仪.地震科学研究,3: 62——64,
[8] Wang, P. D., Song, L. Y., and Wu, F. T., 1985. Near——field seismic observation with a mobile little apes——ture network, Geophysical Research, 1, 215——227.
[9] Wu, F. T., Song, L. Y., Wang, P. D., 1984. A ground motion synthesis study using small earthquake as Green's function. Proceedings of International Workshop ou Earthquake Engineering, A——21. Tongji Universtty.[1] Herrman, R. B., 1975. A student's guide to the use of P and S wave data for focal mechanism determina——tion. Earthq. Notes, 46, 4, 29——39.
[2] Kisslinger, C., 1980. Evaluation of S to P amplitude ratio for determining focal mechanisms from re——gional network observation. Bull. Seism. Soc. Amer.. 70, 999——1014.
[3] Kisslinger, C., Bowman, J. R. and Kock, K. 198 i. Procedures for computing focal mechanisms from local (SV/P)z data. Bull. Seism. Soc. Amen, 71, 1719——1729.
[4] 梁尚鸿、李幼铭、束沛锰、朱陪定,1984.利用区域地震台网p,S振幅比资料测定小震震源参数.地球物理学报,27, 249——258,
[5] 吴大铭、王培德,1986.剑川地震余震研究及剑川地震发震构造.地震研究,10,1, 29——36.
[6] Aki, K., and Richards, P. G,1980. (W antitative Seismology: Theory and Methods, Vol. 1, W. H. Freemdn, San Francisco.
[7] 王培德,1981.一种新型的数字磁带记录地震仪——DCS——302型地震仪.地震科学研究,3: 62——64,
[8] Wang, P. D., Song, L. Y., and Wu, F. T., 1985. Near——field seismic observation with a mobile little apes——ture network, Geophysical Research, 1, 215——227.
[9] Wu, F. T., Song, L. Y., Wang, P. D., 1984. A ground motion synthesis study using small earthquake as Green's function. Proceedings of International Workshop ou Earthquake Engineering, A——21. Tongji Universtty. -
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