2013年6月
Dynamic landslide processes revealed by broadband seismic records
GEOPHYSICAL RESEARCH LETTERS
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- ,
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- 巻
- 40
- 号
- 12
- 開始ページ
- 2998
- 終了ページ
- 3002
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1002/grl.50437
- 出版者・発行元
- AMER GEOPHYSICAL UNION
We use broadband seismic recordings to trace the dynamic process of the deep-seated Akatani landslide that occurred on the Kii Peninsula, Japan, which is one of the best recorded large slope failures. Combining analyses of the seismic records with precise topographic surveys done before and after the event, we can resolve a detailed time history of the mass movement. During 50s of the large landslide, we observe a smooth initiation, acceleration with changes in basal friction, and reversal of the momentum when the mass collides with the opposite valley wall. Of particular importance is the determination of the dynamic friction during the landslide. The coefficient of friction is estimated to be 0.56 at the beginning of the event and drops to 0.38 for most of the sliding. The change in the frictional level on the sliding surface may be due to liquefaction or breaking of rough patches and contributes to the extended propagation of the large landslide.
- リンク情報
- ID情報
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- DOI : 10.1002/grl.50437
- ISSN : 0094-8276
- J-Global ID : 201302202428793486
- Web of Science ID : WOS:000321951300022