用烈度资料反演Qssub>、扩散因子和震源S波加速度.
DETERMINATION OF Qs, SPREADING FACTOR AND SOURCE S WAVE ACCELERATION BY INVERSION OF SEISMIC INTENSITY DATA
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摘要: 本文采用发生在中国的35个地震的烈度资料,用阻尼最小二乘法解超定方程组的方法,反演了中国7个区的1秒周期S波品质因子Q_S的平均值、扩散因子和震源S波加速度.并探讨了震源S波加速度与震级的关系.作为一个例子,反演了台湾地区Qs值的二维平面分布,发现Qs值分布与布格重力异常、地震活动性存在某种对应关系. 对反演结果进行了初步分析和讨论,并估计了Qs的误差.Abstract: In this paper, on the basis of intensity data from 85 earthquakes that occurred in China, the method of resolving overdetermined equations by using the damped least squares method is applied to inversing for the mean value of 1-sec. S wave quality factor, the spreading factor and the source S wave acceleration in 7 regions of China. The relation between soures S wave acceleration and magnitude is discussed. As an example, 2-D Qs distribution in Taiwan Province is obtained by inversion. It is found that there exists some correspondence relation between this distribution and Bouguer gravitational anomaly and seismicity.Preliminary analysis and discussion on results of the inversion, and estimation of error in Qs are made.
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[4] Nuttli, O. W., Bollinger, G. A. and Griffiths, D. W., 1979. On the relation between Modified Mercalliintensity and body——wave magnitude. Bull. Seism. Soc. Am., 69, 893——909.
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[6] by inversion of seismic intensity data:Determination of seismic attenuation structure and source strengtb method and numerical experiment. J. Phys. Earth. 32, 299——316.
[7] 吴大铭、王培德、陈运泰,1987.北京和云南剑川地区的Q,和Qs.地晨学报,337——346,
[8] Aki, K. and Lee., W. H. K., 1976. Determination of three——dimensional velocity anomalies under a seismic array using first P arrival times from local earthquakes, 1. A, homogeneous initial model. J. Geonhvr. Rer., 81, 4381——4399.
[9] Кондорская, Н. В., Шебалин, Н. В.,1977.Новмй каталог рилъних эемлетрясеНий на территории СССР с древнейщих времен до 1975 Г., Наука. Москва,1——12
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[12] Umino. N. and Hasegawa, A., 1984. Three dimensional Qs structure in the Northeastern Japan Arc. Zisin, 37, 2, 213——228,
[13] Hadley, D. M., Helmberger D. V, and Orcutt, J. A., 1982. Peak acceleration scaling studies.Bull. Seim. Soc. Am., 72, 959——979,
[14] Gutenbeng, B, and Richter, C.F., 1942. Earthquake magnitude, intensity, energy, and acceleration, Bull. Seirm. Soc. Am., 32, 163——191.[1] 高龙生,1985,Q值研究当前所面临的问题.国际地震动态,10;1——5,
[2] Evernden, J. F., 1975. Seismic intensity, "size" of earthquakes and related phenomena. Bull, Seirm. Soc.Am., 65, 1287——1315.
[3] Nuttli, O. W., 1973. The Mississippi valley earthquakes of 1811 and 1812; intensities, ground motion, and magnitudes. Bull, Seirm. Soc. Am., 63, 227——248.
[4] Nuttli, O. W., Bollinger, G. A. and Griffiths, D. W., 1979. On the relation between Modified Mercalliintensity and body——wave magnitude. Bull. Seism. Soc. Am., 69, 893——909.
[5] CHEN, P. S. and Nuttli, O. W., 1984. Estimates of magnitudes and short——period wave attenuation of Chinese earthquakes from Modified Mecarlli,intensity data. Bull. Seism. Soc. Am., 74, 957——968. Hashida, T. and Shimazaki, K. 1984.
[6] by inversion of seismic intensity data:Determination of seismic attenuation structure and source strengtb method and numerical experiment. J. Phys. Earth. 32, 299——316.
[7] 吴大铭、王培德、陈运泰,1987.北京和云南剑川地区的Q,和Qs.地晨学报,337——346,
[8] Aki, K. and Lee., W. H. K., 1976. Determination of three——dimensional velocity anomalies under a seismic array using first P arrival times from local earthquakes, 1. A, homogeneous initial model. J. Geonhvr. Rer., 81, 4381——4399.
[9] Кондорская, Н. В., Шебалин, Н. В.,1977.Новмй каталог рилъних эемлетрясеНий на территории СССР с древнейщих времен до 1975 Г., Наука. Москва,1——12
[10] 谢家树、邵辉成,1988.中国地震烈度衰减率分区.地震学报,10, 423——436,
[11] 中国科学院地质研究所,1977.中国地晨地质概论.科学出版社,北京,82——87,
[12] Umino. N. and Hasegawa, A., 1984. Three dimensional Qs structure in the Northeastern Japan Arc. Zisin, 37, 2, 213——228,
[13] Hadley, D. M., Helmberger D. V, and Orcutt, J. A., 1982. Peak acceleration scaling studies.Bull. Seim. Soc. Am., 72, 959——979,
[14] Gutenbeng, B, and Richter, C.F., 1942. Earthquake magnitude, intensity, energy, and acceleration, Bull. Seirm. Soc. Am., 32, 163——191. -
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