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Title: Direct estimation of near-surface damping based on normalized energy density
Authors: Goto, H.  kyouindb  KAKEN_id  orcid (unconfirmed)
Kawamura, Y.
Sawada, S.
Akazawa, T.
Author's alias: 後藤, 浩之
Keywords: Earthquake ground motion
Seismic attenuation
Site effects
Wave propagation
Issue Date: 10-Jun-2013
Publisher: Oxford University Press
Journal title: Geophysical Journal International
Volume: 194
Issue: 1
Start page: 488
End page: 498
Abstract: We propose a direct estimation of dampings in surface layers based on the normalized energy density (NED). The ratio of the NED, defined as the NED for the uppermost layer divided by the NED for the basement, correlates well with the total damping, t^∗_S. We apply the relation between the NED ratio and the total damping to estimate the total damping at an actual site, Katagihara (KTG) site in Japan. The total damping at the KTG site is directly estimated as t^∗_S=0.038. This value agrees well with the estimated values determined from a conventional method, incorporating the non-linear inversion scheme.
Rights: This article has been accepted for publication in 'Geophysical Journal International'
© The Authors 2013. Published by Oxford University Press on behalf of The Royal Astronomical Society.
DOI(Published Version): 10.1093/gji/ggt104
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