FactSheet: FS2016-E-0003

Title:
Ground fissures that appeared in Aso Caldera Basin in the 2016 Kumamoto Earthquake, Japan

Authour:
Kazuo KONAGAI¹, Takashi KIYOTA², Masataka SHIGA³, Hikaru TOMITA⁴, Hiroki OKUDA⁵, Kazuhiro KAJIHARA⁶

1Fellow, JSCE, Professor, Institute of Urban Innovation, Yokohama National University
2Member of JSCE, Assoc. Professor, Institute of Industrial Science, University of Tokyo
3Graduate student, Institute of Urban Innovation, Yokohama National University
4Graduate student, Institute of Urban Innovation, Yokohama National University
5Graduate student, Institute of Urban Innovation, Yokohama National University
6Graduate student, Institute of Urban Innovation, Yokohama National University

Key Facts:
・ Hazard Type: Earthquake
・ Date of disaster:April 14th and 16th, 2016
・ Location of Survey:Northwestern part of Aso caldera, Kumamoto, Japan
・ Date of the field survey: April 29th to May 2nd, 2016
・ Survey tools: Unmanned aerial vehicle (UAV), GPS

Key findings:
1) A swath of ground depression extends fragmentally over about a 10 km distance in the Aso Caldera Basin.
2) Detail features of the ground depression observed by using UAV photos showed neither clear indication of soil liquefaction nor lateral offset of the ground.

Key Words:
Kumamoto Earthquake, surface ruptures, UAV photogrammetry

Paper: PDF 1,163KB