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タイトル: | Identifying landslides from continuous seismic surface waves: a case study of multiple small-scale landslides triggered by Typhoon Talas, 2011 |
著者: | Okuwaki, Ryo Fan, Wenyuan Yamada, Masumi ![]() Osawa, Hikaru Wright, Tim J. |
著者名の別形: | 奥脇, 亮 山田, 真澄 大澤, 光 |
キーワード: | Time-series analysis Seismic noise Surface waves and free oscillations Wave propagation Tectonics and landscape evolution |
発行日: | Aug-2021 |
出版者: | Oxford University Press (OUP) |
誌名: | Geophysical Journal International |
巻: | 226 |
号: | 2 |
開始ページ: | 729 |
終了ページ: | 741 |
抄録: | Landslides can cause devastating damage. In particular, heavy rainfall-triggered landslides pose a chain of natural hazards. However, such events are often difficult to detect, leaving the physical processes poorly understood. Here we apply a novel surface-wave detector to detect and locate landslides during the transit of Typhoon Talas 2011. We identify multiple landslides triggered by Typhoon Talas, including a landslide in the Tenryu Ward, Shizuoka prefecture, Japan, ∼400 km east from the typhoon track. The Tenryu landslide displaced a total volume of 1.2 - 1.5 × 10⁶ m³. The landslide is much smaller than those detected by using globally recorded surface waves, yet the event generated coherent seismic signals propagating up to 3000 km away. Our observations show that attributes of small and large landslides may follow the same empirical scaling relationships, indicating possible invariant failure mechanisms. Our results also suggest an alerting technology to detect and locate landslides with a sparse seismic network. |
記述: | 地震波形で地すべりの発生を効果的に探す手法を開発. 京都大学プレスリリース. 2021-04-12. |
著作権等: | This article has been accepted for publication in ’Geophysical Journal International' © The Author(s) 2021 Published by Oxford University Press on behalf of The Royal Astronomical Society. All rights reserved. |
URI: | http://hdl.handle.net/2433/262790 |
DOI(出版社版): | 10.1093/gji/ggab129 |
関連リンク: | https://www.kyoto-u.ac.jp/ja/research-news/2021-04-12 |
出現コレクション: | 学術雑誌掲載論文等 |
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