Pre-eruptive and co-eruptive deformation of Kirishima volcano, Japan with deep and shallow sources modeling constrained from InSAR and GPS data

Thursday, 17 December 2015
Poster Hall (Moscone South)
Yunjun Zhang1, Falk Amelug2, Fabien Albino2 and Yosuke Aoki3, (1)University of Miami, Miami, FL, United States, (2)University of Miami, Miami, FL, United States, (3)Earthquake Research Institute, University of Tokyo, Tokyo, Japan
Kirishima volcano group is located on the southern part of Kyushu, Japan. Prior to its 2011 magmatic eruption, several phreatic eruptions occurred on August 2008 and March, April, May, June and July 2010. Using time series InSAR from 2007-2011 ALOS PALSAR data, we found a small deflating area around Shinmoe-dake volcano summit and a relatively large inflating area on the northwest of Shinmoe-dake volcano, before 2011 Kirishima, Shinmoe-dake eruption. Modeling constrained from both InSAR and dense regional GPS network data revealed deep and shallow deformation sources for Kirishima volcano. This double sources system would help us better understand the complex process of volcanic deformation.