論文

査読有り
2003年4月

Source modeling using strong-motion waveforms: Toward automated determination of earthquake fault planes and moment-release distributions

BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
  • K Kuge

93
2
開始ページ
639
終了ページ
654
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1785/0120020076
出版者・発行元
SEISMOLOGICAL SOC AMER

The geometry, size, and slip distribution of earthquake faults control the generation of strong ground motions around earthquake source regions. Fast determination, which is inevitably made by automated methods, of such source characteristics is important for estimating characteristics of strong ground motions. This study suggests that determination of the source parameters can be automated using the waveform data from modem strong-motion instruments. The method consists of three separate linear inversions, which provide data on moment tensor solutions, fault planes and their length, and distributions of moment release on the finite faults, respectively. Tests for five inland earthquakes (M > 6) beneath Japan show that the fault planes and distributions of moment release, which were obtained in the present method without human inspections, are in good agreement with the aftershock distributions and the results from other studies. The successful application of this method is produced by the broadband responses of modem strong-motion instruments that are deployed at a regular spacing. The method works best for shallow strike-slip earthquakes. Success with shallow dip-slip earthquakes is supported by a numerical test and the result for a reverse-fault earthquake. The second inversion, which models waveforms using aligned point sources to determine fault planes and their length, can contribute to speeding up the analyses of source processes. The present results suggest that using realtime data from strong-motion instruments will enable fast determination of source processes and consequently lead to the rapid estimation of ground motions.

リンク情報
DOI
https://doi.org/10.1785/0120020076
J-GLOBAL
https://jglobal.jst.go.jp/detail?JGLOBAL_ID=200902276051086934
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000182810100009&DestApp=WOS_CPL
ID情報
  • DOI : 10.1785/0120020076
  • ISSN : 0037-1106
  • J-Global ID : 200902276051086934
  • Web of Science ID : WOS:000182810100009

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