AMPLIFICATION FACTOTS BY USE OF H/V SPECTRAL RATIO AT THE GROUND SURFACE FOR THE P -WAVE PART

Abstract

The paper deals with the H/V spectral ratio of the P-wave motions to empirically derive the amplification factors due to the local soil conditions. The Sendai Observation Site of KiK-net was discussed as a trail site for the purpose. The WV spectral ratio obtained from the records at the site shows a good correlation with the theoretical amplification factors. This paper concludes that the P-wave phases of strong ground motions provide effective information of amplifications due to local soil conditions by use of the H/V spectral technique.