Consideration of Crustal Deformation in the Adjacent Area of Plate Boundary

Southwestern Ryukyu Arc and Eastern Taiwan region are characterized by subduction and collision of the Philippine Sea Plate and Eurasian Plate. Huatung Longitudinal Valley is a huge valley running between the cities of Hualian and Tainting in Eastern Taiwan with approximate length of 130 km. This valley is also located in between Central Mountain Range and Coastal Mountain Range. Since 1998, Tokai University has started to measure seismological activities with Dahan Institute of technology (DIT), a Taiwan Technology University, also measuring GPS and Electronic Distance Meter (EDM) data to monitor the crustal movement in the northern part of test area. We have performed a repeat-pass differential interferometric analysis using the ENVISAT/ASAR data. In addition, we propose a crustal movement extraction approach useful when insufficiency of the successful SAR image pairs.