Study on Amplifying Effect Caused by Focal Depth Based on HVSR Method:A Case Study of Kanto Basin
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.
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