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Mechanism of two rapid and long-runout landslides in the 16 April 2016 Kumamoto earthquake using a ring-shear apparatus and computer simulation (LS-RAPID)

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Abstract

Around hundred landslides were triggered by the Kumamoto earthquakes in April 2016, causing fatalities and serious damage to properties in Minamiaso village, Kumamoto Prefecture, Japan. The landslides included many rapid and long-runout landslides which were responsible for much of the damage. To understand the mechanism of these earthquake-triggered landslides, we carried out field investigations with an unmanned aerial vehicle to obtain DSM and took samples from two major landslides (Takanodai landslide and Aso-ohashi landslide) to measure parameters of the initiation and the motion of landslides. A series of ring-shear tests and computer simulations were conducted using a measured Kumamoto earthquake acceleration record from KNet station KMM005, 10 km west of Aso-ohashi landslide. The research results supported our assumed mechanism of sliding-surface liquefaction for the rapid and long-runout motion of these landslides.

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Authors and Affiliations

  1. International Consortium on Landslides, 138-1, Tanaka Asukaicho, Sakyo-ku, Kyoto, 606-8226, Japan

    Khang Dang & Kyoji Sassa

  2. VNU University of Science, Vietnam National University, Hanoi, Vietnam

    Khang Dang

  3. Research Institute for Natural Hazards and Disaster Recovery, Niigata University, Niigata, Japan

    Hiroshi Fukuoka

  4. National Research Institute for Earth Science and Disaster Resilience, Ibaraki, Japan

    Naoki Sakai

  5. GODAI Development Corporation, Kanazawa, Japan

    Yuji Sato

  6. Disaster Prevention Research Institute, Kyoto University, Kyoto, Japan

    Kaoru Takara, Pham Van Tien & Nguyen Duc Ha

  7. Institute of Transport Science and Technology, Hanoi, Vietnam

    Lam Huu Quang & Doan Huy Loi

Authors
  1. Khang Dang
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  2. Kyoji Sassa
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  3. Hiroshi Fukuoka
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  4. Naoki Sakai
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  5. Yuji Sato
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  6. Kaoru Takara
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  7. Lam Huu Quang
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  8. Doan Huy Loi
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  9. Pham Van Tien
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  10. Nguyen Duc Ha
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Corresponding author

Correspondence to Khang Dang.

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Dang, K., Sassa, K., Fukuoka, H. et al. Mechanism of two rapid and long-runout landslides in the 16 April 2016 Kumamoto earthquake using a ring-shear apparatus and computer simulation (LS-RAPID). Landslides 13, 1525–1534 (2016). https://doi.org/10.1007/s10346-016-0748-9

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  • DOI: https://doi.org/10.1007/s10346-016-0748-9

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