5:15 PM - 6:30 PM
[STT54-P06] Volcanic deformation in Tokachi-dake volcano, Hokkaido, detected by DInSAR observations
Keywords:SAR, Deformation, Tokachi-dake Volcano
Continuous GNSS sites were located adjacent to the top of the volcano. They have revealed that local inflation occurred in the area and it continued up to 2015. These inflation increased in May, 2015. X-band SAR/TanDEM-X and L-band SAR/ALOS-2 observed the Tokachi-dake volcano in same period, and detected the local transient inflation of top of Tokachi-dake volcano. In this study, we tried to acquire two dimensional displacements, using DInSAR results observed from both west and east side of the area. Then we tried to infer deformation source. First, we use simple Mogi source [Mogi, 1958] as the deformation source, but it is necessary to take into consideration an influence of the terrain [Kawaguchi et al., 2016]. Then we acquire better fit between observed and modeled data.