Continuous monitoring of the ground surface change in Sakurajima volcano using RADARSAT-2 data

We applied C-band SAR data acquired by RADARSAT-2 to examine ground surface changes in the active volcanic field. In the active volcano area, the observation of secondary disaster with rainfall is also important as well as direct influence by the volcanic eruption. By continuous monitoring, we generated a change detection image from the Spotlight mode data (1m resolution). By using the change detection images and also by field survey, sand movements with debris flow and ground surface change by eruption were extracted. We concluded that continuous monitoring using the SAR is effective for preventing volcanic disaster.