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A Comparison Study of the Amplification Characteristics of the Seismic Station near Yedang Reservoir using Background Noise, S-wave and Coda wave Energy
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 Title & Authors
A Comparison Study of the Amplification Characteristics of the Seismic Station near Yedang Reservoir using Background Noise, S-wave and Coda wave Energy
Wee, Soung-Hoon; Kim, Jun-Kyoung; Yoo, Seong-Hwa; Kyung, Jai-Bok;
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Seismograms are composed of 3 characteristics, that is, seismic source, attenuation, and site amplification. Among them, site amplification characteristics should be considered significantly to estimate seismic source and attenuation characteristics with more confidence. This purpose of this study is to estimate the site amplification characteristics at each site using horizontal to vertical (H/V) spectral ratio method. This method, originally proposed by Nakamura (1989), has been applied to study the surface waves in microtremor records. It has been recently extended to the shear wave energy of strong motion and applied to the study of site amplification. This study analyzed the H/V spectral ratio of 6 ground motions respectively using observed data from 4 sites nearby in Yedang Reservoir. And then, site amplification effects at each site, from 3 kinds of seismic energies, that is, S waves, Coda waves energy, and background noise were compared each other. The results suggested that 4 sites showed its own characteristics of site amplification property in specific resonance frequency ranges (YDS: ~11 Hz, YDU: ~4 Hz, YDD: ~7 Hz). Comparison of this study to other studies using different analysis method can give us much more information about dynamic amplification of domestic sites characteristics and site classification.
S wave;Coda wave;background noise;site amplification;H/V spectral ratio;
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