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FactSheet: FS2019-E-0001

投稿者:柳川 博之 投稿日時:木, 2019-01-10 17:12

Title:
Runouts of landslide masses detached in the 2018 Hokkaido Eastern Iburi Earthquake

Authour:
Kazuo KONAGAI1, Alessandra Mayumi NAKATA2

1Fellow of JSCE, Professor Emeritus, University of Tokyo, Japan
2Member of JSCE, Researcher, International Consortium on Landslides, Japan

Key Facts:
・Hazard Type: Earthquake
・Date of disaster: Sept. 6th, 2018
・Location of Survey: Iburi, Hokkaido, Japan
・Date of the field survey: Nov. 13th to 17th, 2018
・Survey tools: GPS receivers, UAV

Key findings:
1)Morphological features of 30 landslide masses in the epicentral area suggested that the activatedaverage frictional coefficients on slip surfaces, μ1, and flat rice fields, μ2, could have been about0.165 and 0. 36, respectively.
2)However,
μ1 might have been even smaller than this value for smaller and gentler detachedmasses.

Key Words:Hokkaido Eastern Iburi Earthquake, volcanic ash and pumice, landslides

Paper: PDF 1,334KB

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