Strong motion uncertainty determined from observed records by dense network in Japan

Nobuyuki Morikawa, Tatsuo Kanno, Akira Narita, Hiroyuki Fujiwara, Toshihiko Okumura, Yoshimitsu Fukushima, Aybars Guerpinar

研究成果: ジャーナルへの寄稿記事

52 引用 (Scopus)

抄録

The variation of ground motions at specific stations from events in six narrow areas was inspected by using K-NET and KiK-net records. A source-area factor for individual observation stations was calculated by averaging ratios between observed values for horizontal peak acceleration and velocity, as well as acceleration response spectra for 5% damping, and predicted values using a ground-motion model (usually known as an attenuation relation) by Kanno et al. (Bull Seismol Soc Am, 96:879-897, 2006). Standard deviations between observed and predicted amplitudes after the correction factor are less than 0.2 on the logarithmic scale and decrease down to around 0.15 in the short-period range. Intra-event standard deviation clearly increases with decreasing distance due to differing paths around near source area. Standard deviations may increase with amplitude or decrease with magnitude; however, both amplitude and magnitude of the data are strongly correlated with distance. The standard deviation calculated in this study is obviously much smaller than that of the original ground-motion model, as epistemic uncertainties are minimized by grouping ground motions at specific stations. This result indicates that the accuracy of strong ground motion prediction could be improved if ground-motion models for specified region are determined individually. For this to be possible, it is necessary to have dense strong-motion networks in high-seismicity regions, such as K-NET and KiK-net.

元の言語英語
ページ(範囲)529-546
ページ数18
ジャーナルJournal of Seismology
12
発行部数4
DOI
出版物ステータス出版済み - 5 27 2008

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strong motion
ground motion
Japan
standard deviation
stations
Damping
peak acceleration
damping
Uncertainty
seismicity
attenuation
prediction
predictions
station

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geochemistry and Petrology

これを引用

Morikawa, N., Kanno, T., Narita, A., Fujiwara, H., Okumura, T., Fukushima, Y., & Guerpinar, A. (2008). Strong motion uncertainty determined from observed records by dense network in Japan. Journal of Seismology, 12(4), 529-546. https://doi.org/10.1007/s10950-008-9106-2

Strong motion uncertainty determined from observed records by dense network in Japan. / Morikawa, Nobuyuki; Kanno, Tatsuo; Narita, Akira; Fujiwara, Hiroyuki; Okumura, Toshihiko; Fukushima, Yoshimitsu; Guerpinar, Aybars.

:: Journal of Seismology, 巻 12, 番号 4, 27.05.2008, p. 529-546.

研究成果: ジャーナルへの寄稿記事

Morikawa, N, Kanno, T, Narita, A, Fujiwara, H, Okumura, T, Fukushima, Y & Guerpinar, A 2008, 'Strong motion uncertainty determined from observed records by dense network in Japan', Journal of Seismology, 巻. 12, 番号 4, pp. 529-546. https://doi.org/10.1007/s10950-008-9106-2
Morikawa, Nobuyuki ; Kanno, Tatsuo ; Narita, Akira ; Fujiwara, Hiroyuki ; Okumura, Toshihiko ; Fukushima, Yoshimitsu ; Guerpinar, Aybars. / Strong motion uncertainty determined from observed records by dense network in Japan. :: Journal of Seismology. 2008 ; 巻 12, 番号 4. pp. 529-546.
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