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Analysis of Site Amplification Characteristics of Several Seismic Stations Distributed in the Southern Korean Peninsula  

Kim, Jun-Kyoung (세명대학교 자원환경공학과)
Publication Information
Tunnel and Underground Space / v.16, no.6, 2006 , pp. 486-494 More about this Journal
Abstract
The horizontal to vertical (H/V) ratio technique in spectral domain is a common useful technique to estimate empirical site transfer function. The technique, originally proposed by Nakamura, is proposed to analyse the surface waves in the micrortremor records. The purpose of this paper is to estimate spectral ratio using observed data at the seismic stations distributed within Southern Korean Peninsula from the Fukuoka earthquake including 11 aftershocks. The results show that most of the stations have fairly good amplification characteristics in low frequency band. However, some of the seismic stations show one (resonant frequency specific to the site) or several local peaks of amplification factors with narrow high frequency band. Even though the site amplification characteristics are important information, we should be careful to analyse the observed ground motions from the seismic stations which have several very high amplification peaks for the deconvolution of seismic source and attenuation parameters.
Keywords
Empirical site transfer function; H/V spectral ratio; Surface wave; Resonant frequency;
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