SEGJ Technical Conference

Study on the surface deformation around Mt.Mihara of Hachijojima using SAR Interferometry

Abstract It is very important for volcanic disaster prevention to grasp surface deformation of volcanoes. In Japan, surface deformation have been observed using Global Navigation Satellite System (GNSS) since the 1990s. GNSS, however, can observe surface deformation only at the observation point. Recently SAR (Synthetic Aperture Rader) interferometry analysis that can be used to generate maps of surface deformation of analysis area has attracted a lot of attention. In order to grasp the trend of surface deformation of Mt.Mihara in Hachijojima Island, we have employed SAR interferometry analysis. The analysis period is from January 2015 to June 2018. The result of SAR interferometry shows the trend of slight uplift around the summit of Mt.Mihara. On the other hand, trend of surface deformation of near the foot of Mt.Mihara is different from the deformation trend of near the summit of Mt.Mihara.