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http://dx.doi.org/10.5467/JKESS.2009.30.7.810

Characteristics of Site Amplification of the Broad-band Seismic Stations in Korea  

Kim, Seo-Young (Earthquake Research Center, Korea Institute of Geoscience and Mineral Resources)
Kim, Sung-Kyun (School of Earth and Environmental Sciences, Chonnam National University)
Publication Information
Journal of the Korean earth science society / v.30, no.7, 2009 , pp. 810-823 More about this Journal
Abstract
One of the critical factors in accurate determination of earthquake source parameters, and in prediction of seismic hazards is the detailed information related to the site amplification characteristics. The site amplification characteristics of the broad-band seismic stations in Korea were estimated as a function of frequency in the range of 0.2 to 20 Hz. A total of 1275 seismograms recorded from 43 earthquakes observed from 2003 to 2008 in the southern Korean Peninsula were used. It was found that the site amplification ratios for 28 stations estimated from the inversion of the ground motion model were approximately concordant with those obtained from the horizontal-to-vertical (H/V) spectral ratio except for some stations. The spectral site amplification characteristics obtained in this study did not show any considerable spatial distribution. It revealed to be largely correlated with the degree of weathering rather than the basement rock type. Considering the spectral site amplification ratio, 28 broad-band stations were classified into four groups and the characteristics of each group were described in the text.
Keywords
seismic station; site amplification ratio; H/V spectral ratio;
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Times Cited By KSCI : 4  (Citation Analysis)
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