用烈度资料反演Q_s、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

作　　者：谢家树[1] 邵辉成[1] 

机构地区：[1]陕西省地震局,中国西安7100068

出　　处：《地震学报》1991年第2期202-211,共10页Acta Seismologica Sinica

基　　金：地震科学联合基金会

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Q_s值的二维平面分布,发现Q_s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Q_s的误差.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.

关 键 词：地震 烈度 扩散因子 S波 震源 

分 类 号：P315.9[天文地球—地震学]