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研究了印变境内的喜马拉雅山地区峰值地面水平加速度的一种衰减关系。资料源自印度强震台阵记录的5次地震中提取的66个峰值地面水平加速度。目前使用的分析方法是两步成层的回归模型,其衰减关系假设为: log(A)=-1.072+0.390 3M-1.21log(X+e~(0.587 3M))式中,A为峰值地面加速度(g),M为震级,X为震源距。残差平方和为0.14。把这一衰减关系与其他的衰减关系进行了比较。与其他关系式相比,这一关系式在较近的距离上具有较少的数值,因而还需要更多的数据作更深入的研究。当有更多的数据可利用时,这一衰减关系尚需进一步改进。
A decay relationship between peak ground horizontal acceleration in the Himalayas in India and India was studied. The data are derived from 66 peak ground-level accelerations extracted from 5 earthquakes recorded by the Strong Earthquake Array in India. The analysis method currently used is a two-step regression model, and the attenuation relationship is assumed as follows: log (A) = -1.072 +0.390 3M-1.21 log (X + e0.587 3M)) where A is the peak ground Acceleration (g), M is the magnitude, X is the source distance. The residual sum of squares is 0.14. This decay relationship is compared with other attenuation relationships. Compared with other relations, this relationship has fewer values at shorter distances, so more data are needed for further research. This attenuation relationship still needs further improvement when more data is available.