Unzen-Mayuyama megaslide

LCI : JPN1607121655
Main Information
Landslide Name : Unzen-Mayuyama megaslide
Latitude : 32:45:51.51 N
Longitude : 130:20:54.16 E
Location
City / District : Shimabara
Province : Nagasaki
Country : Japan
Reporter
Reporter 1 : Khang Dang
Reporter 2 : Kyoji Sassa
Landslide Type
Material : Complex
Movement : Slide
Velocity (mm/sec) : Extremely Rapid
Depth (m) : Very Deep
Slope (degree) : Moderate
Volume (m³) : Extremely Large
Date of Occurence
Date of Occurence : May 21, 1792
Other Information
Land Use Source area : Forest
Run-out/deposition area : Farming, Urban area, Industrial use, Road, Railways, Sea/lake
Other Activity : Active in the past
Triggering Factor : Earthquake
Death(s) & Missing : 15153
Houses and other structural damage : -
Photo of landslide :
Google earth kmz file : 11478764606.kmz
Plan of landslide :
Cross section of landslide :
Reference (paper/report) : http://link.springer.com/article/10.1007/s10346-003-0004-y
Testing graph : Fig1478764606.xlsx
Monitoring graph : Iwate-Miyagi Earthquake CS1478764606.xlsx
Video of moving landslides including 3D simulation : https://www.youtube.com/watch?v=GwAWjdXXNbk
Description :

The greatest landslide disaster in the history of Japan is the 1792 Unzen–Mayuyama megaslide (Nakada et al. 1992, 1999). Its volume was 3.4×108 m3 and the maximum depth was 400 m; around 15,000 people were killed by the landslide and its resulting tsunami (Unzen Restoration Office of the Ministry of Land, Infrastructure and Transport of Japan 2002; 2003). This report was made based on the paper of Sassa et al. 2014 published in Landslides Journal. This report referred the research in the paper `Kyoji Sassa I Khang Dang I Bin He I Kaoru Takara I Kimio Inoue I Osamu Nagai (2014) A new high-stress undrained ring-shear apparatus and its application to the 1792 Unzen–Mayuyama megaslide in Japan. Landslides Vol. 11:827–842`