Estimation of deformation volume in Mt. Mayon in Phillipine using differential SAR interferometry by using EERS tandem

Mayon volcano has still erupted five or ten years interval, where is located at south of Luzon Island in Philippine. It is remembered that the eruption of Mt. Pinatubo in Philippine caused the tremendous disaster such as mudflow. As Mt. Mayon is one of biggest volcanic mountain in Philippine, it must be monitored the situation. Especially, it is important to measure the deformation caused by eruptions. This study is experimental analysis for deformation of volcanic mountain. The differential SAR technique was applied to detect the deformation area of Mt. Mayon using European ERS1 and 2 Tandem data. The proposed method was as follows. (1) generation SAR interferometries from two pair of EERS tandem data. (2) generation DEM from the unwrapped interferometries. (3) comparison generating DEM each others and existed topographical maps. The results shows the area and depth of lava flow by the eruption. The proposed analysis revealed the deformation area of Mt. Mayon.