摘要
盆地对地震动具有很强的放大作用.文章基于日本关东盆地及其周围20 个台站的记录,研究了S波窗口、S波后 10 秒窗口、尾波窗口之间特征的差异,从理论上解释了这些差异,并研究了三者随震源深度化产生的放大差异.结果表明:尾波窗口、S波后10 秒窗口与S波窗口采用HVSR法得到曲线形状相似.浅源地震引起的S波窗口、S波后 10秒窗口与尾波窗口放大显著高于深源地震.
Abstract
The basin has a significant amplifying effect on ground motion.Based on the records from 20 stations around the Kanto Basin in Japan,this paper studies the differences in characteristics among the S-wave window,the 10-second post S-wave window,and the coda wave window,and provides a theoretical explanation for these differences.Additionally,the study investigates the amplification differences caused by the variation in focal depth among these three wave windows.The results indicate that the shapes of the curves obtained by using the HVSR method for the coda wave window,the 10-second post S-wave window,and the S-wave window are similar.The amplification of the S-wave window,the 10-second post S-wave window,and the coda wave window induced by shallow earthquakes are significantly higher than those induced by deep earthquakes.
万方数据