唐山余震震源参数和衰减的联合反演
INVERSION OF SOURCE PARAMETERS AND ATTENUATION OF THE TANGSHAN AFTERSHOCKS
-
摘要: 利用唐山余震的数字化地震记录,研究了唐山余震的震源参数.发展了一种 P 波谱的反演方法,以消除用波谱分析求解震源参数过程中的不确定因素的影响.经过数值实验和对实际资料的应用,初步证明了这种方法的实用性.利用5个台站接收的35次地震记录的 P 波频谱资料,反演了唐山滦县地区的震源动力学参数,得到了5个台站的 P 波 Q 值和震源频谱的高频衰减率.Q 值分布在408——847之间,均值为520;值分布在1.54——3.22之间,均值为2.41.在该区域的小震频谱的定标律研究中,发现应力降随地震矩的增加而增加.Abstract: Source parameters and characteristics of regional attenuation of Tangshan aftershocks are studied by using digital records of Tangshan aftershocks. An inversion method of P wave spectra to reduce influence on the ambiguity in the estimates of parameters by the usual spectrum analysis method is developed. By testing with artificial data and applying to real data, it is confirmed that the method is usable.Dynamic parameters of the Tangshan Luanxian area are obtained by using records of 35 earthquakes at 5 stations. P wave Q values and high frequency decay rate y of source spectrum at 5 stations are also obtained. The Q values range from 408 to 847, and the mean value is 520; while y ranges from 1.54 to 3.22 and the mean value is 2.41.In the studies of spectra of the microearthquakes in the Luanxian area, that the stress drop increases with increasing earthquake moment is found.
-
-
[1] Aki, K.,1967. Scaling law of seismic spectrum. J. Geophys. Res., 72,1217——1231.
[2] Geller, R. J——1976. Scaling ralation for earthquake source parameters and magnitudes. Bull. Seis. Soc. Amer.66,1501——1523.
[3] Papageorgiou, A. S. and Aki, K., 1985. Scaling law of farfield spectra based on observed parameters of the specific barrier model. PAGEOPN,123, 353——374.
[4] Archulet, R. J——Cranswick, E., Mueller, C. and Spudish, P——1982. Source parameters of the 1980 Mammoth Lakes, California earthquake sequence. J. Geophys. Res., 87, 4595——4607.
[5] Haar, L. C.,Fletcher, J. B. and Mueller, C. S——1984. The 1982 Eula, Arkansas, swarm and scaling of ground motion in the eastern United States. Bull. Seis. Soc. Amer. 74, 2463——2482.
[6] Scherbaum. F. and Stoll, D., 1983 Source parameters and scaling laws of the 1978 Swabian Jura(Southwest Germany)aftershocks. Bull.&。.Soc. Amen,73, 1321——1343.
[7] Johnson, L. R. and McEvilly, T. V., 1974. Nearfield observations and source parameters of central California earthquakes. Bull. Seis. Soc. Amer.,64, 1855——1886.
[8] Dysart, P. S——Snoke, J. A. and Sacks, I. S., 1988. Source parameters and scaling relation for small earthquakes in the Matsushiro region, Southwest Honshu, Japan. Bull. Seis. Soc. Amer. 78, 571——589.
[9] Hanks, T. C.,1982. fa Bull. Seis. Soc. Amen, 72, 1867——1879.
[10] Das. S. and Aki, K.,1977. Fault plane with barriers:A versatile earthquake model. J. Geophys. Res.,82,5658——5670.
[11] Papageorgion, A. S. and Aki, K., 1983. A specific barrier model for the quantitative description of inhomogeneous faulting and prediction of strong ground motion. I. Description of the model. Bull. Seis. Soc.Amer., 73, 693——722.
[12] Papageorgion, A. S. and Aki, K., 1983b. A specific barrier model for the quantitative description of inhomogeneous faulting and prediction of strong ground motion. II.Application of the model. Bull. Seis. Soc. Amer.,73, 953——978
[13] Aki, K,1987. Magnitude——frequency relation for small earthquakes:A due to the origin of large earthquakes. J. Geophys. Res.,92, 1349——1355
[14] Papageorgion, A. S.,1988. On two characteristic frequencies of acceleration spectra: patch corner frequency and a Bull. Seis. Soc. Amer., 78, 509——529.
[15] 范文、原秦喜、惠乃玲、李松林、石林可、张晓普,1987 滦县地区的近场观测.华北地震科学,5, 2, 40——50.
[16] Brune, 3. N., 1970. Tectonic stress and spectra of seismic shear waves from earthquakes. J. Geophys. Res., 75,4997——5009.
[17] Hanks, T. C. and Wyss, M., 1972 The use of body wave spectra in the determination of seismic source parameters. Bull. Seis. Soc. Amer.,62, 561——589.
[18] Sato, T. and Hirasawa, T 1973.Body wave spectra from propagation shear cracks. J. Ps. Earth, 21,415——431.
[19] Masuda, T.,1982. Scaling relations for source parameters of microearthquakes in the Northeastern part of Japan. Doctorial Thesis, Tohoku Univ., 67——70.
[20] 大崎顺彦,1980.地震动的谱分析人门.地震出版社,北京180——186.
[21] Garnet, M. and Trong, P. H., 1980. Some medium properties at Friuli ( Italy ) from amplitude spectrum analysis:a possible change in time or space. Tectonics, 68, 167——182.
[22] Hasegawa, H. S.,1983. Lg spectra of Local earthquakes recorded by the eastern Canada telemetered network and spectral scaling. Bull. Seis. Soc. Amer.,73, 1041——1061.
[23] Itovelli, A., Bonamassa, O.,Cocco, M——Bona, M. D. and Mazza, 5——1988. Scaling laws and spectral parameters of the ground motion in active extensional areas in Italy. Bull. Seis. Soc. Amer.78, 530——560
[24] Nuttli, O. W., 1983. Average seismicsource Amer,73, 519——535.
[25] relations for mid——plate earthquakes. Bull. Seis. Soc. Joyner, W. B——1987. Strongmotion seismology. Rev. Geophys., 25. 1149——1160[1] Aki, K.,1967. Scaling law of seismic spectrum. J. Geophys. Res., 72,1217——1231.
[2] Geller, R. J——1976. Scaling ralation for earthquake source parameters and magnitudes. Bull. Seis. Soc. Amer.66,1501——1523.
[3] Papageorgiou, A. S. and Aki, K., 1985. Scaling law of farfield spectra based on observed parameters of the specific barrier model. PAGEOPN,123, 353——374.
[4] Archulet, R. J——Cranswick, E., Mueller, C. and Spudish, P——1982. Source parameters of the 1980 Mammoth Lakes, California earthquake sequence. J. Geophys. Res., 87, 4595——4607.
[5] Haar, L. C.,Fletcher, J. B. and Mueller, C. S——1984. The 1982 Eula, Arkansas, swarm and scaling of ground motion in the eastern United States. Bull. Seis. Soc. Amer. 74, 2463——2482.
[6] Scherbaum. F. and Stoll, D., 1983 Source parameters and scaling laws of the 1978 Swabian Jura(Southwest Germany)aftershocks. Bull.&。.Soc. Amen,73, 1321——1343.
[7] Johnson, L. R. and McEvilly, T. V., 1974. Nearfield observations and source parameters of central California earthquakes. Bull. Seis. Soc. Amer.,64, 1855——1886.
[8] Dysart, P. S——Snoke, J. A. and Sacks, I. S., 1988. Source parameters and scaling relation for small earthquakes in the Matsushiro region, Southwest Honshu, Japan. Bull. Seis. Soc. Amer. 78, 571——589.
[9] Hanks, T. C.,1982. fa Bull. Seis. Soc. Amen, 72, 1867——1879.
[10] Das. S. and Aki, K.,1977. Fault plane with barriers:A versatile earthquake model. J. Geophys. Res.,82,5658——5670.
[11] Papageorgion, A. S. and Aki, K., 1983. A specific barrier model for the quantitative description of inhomogeneous faulting and prediction of strong ground motion. I. Description of the model. Bull. Seis. Soc.Amer., 73, 693——722.
[12] Papageorgion, A. S. and Aki, K., 1983b. A specific barrier model for the quantitative description of inhomogeneous faulting and prediction of strong ground motion. II.Application of the model. Bull. Seis. Soc. Amer.,73, 953——978
[13] Aki, K,1987. Magnitude——frequency relation for small earthquakes:A due to the origin of large earthquakes. J. Geophys. Res.,92, 1349——1355
[14] Papageorgion, A. S.,1988. On two characteristic frequencies of acceleration spectra: patch corner frequency and a Bull. Seis. Soc. Amer., 78, 509——529.
[15] 范文、原秦喜、惠乃玲、李松林、石林可、张晓普,1987 滦县地区的近场观测.华北地震科学,5, 2, 40——50.
[16] Brune, 3. N., 1970. Tectonic stress and spectra of seismic shear waves from earthquakes. J. Geophys. Res., 75,4997——5009.
[17] Hanks, T. C. and Wyss, M., 1972 The use of body wave spectra in the determination of seismic source parameters. Bull. Seis. Soc. Amer.,62, 561——589.
[18] Sato, T. and Hirasawa, T 1973.Body wave spectra from propagation shear cracks. J. Ps. Earth, 21,415——431.
[19] Masuda, T.,1982. Scaling relations for source parameters of microearthquakes in the Northeastern part of Japan. Doctorial Thesis, Tohoku Univ., 67——70.
[20] 大崎顺彦,1980.地震动的谱分析人门.地震出版社,北京180——186.
[21] Garnet, M. and Trong, P. H., 1980. Some medium properties at Friuli ( Italy ) from amplitude spectrum analysis:a possible change in time or space. Tectonics, 68, 167——182.
[22] Hasegawa, H. S.,1983. Lg spectra of Local earthquakes recorded by the eastern Canada telemetered network and spectral scaling. Bull. Seis. Soc. Amer.,73, 1041——1061.
[23] Itovelli, A., Bonamassa, O.,Cocco, M——Bona, M. D. and Mazza, 5——1988. Scaling laws and spectral parameters of the ground motion in active extensional areas in Italy. Bull. Seis. Soc. Amer.78, 530——560
[24] Nuttli, O. W., 1983. Average seismicsource Amer,73, 519——535.
[25] relations for mid——plate earthquakes. Bull. Seis. Soc. Joyner, W. B——1987. Strongmotion seismology. Rev. Geophys., 25. 1149——1160
计量
- 文章访问数: 1389
- HTML全文浏览量: 22
- PDF下载量: 97
下载:
