FactSheet: FS2019-E-0001

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