Newly velocity field of Sulawesi Island from GPS observation

• Main Authors: Sarsito, D. A., Susilo, Simons, W. J. F., Abidin, H. Z., Sapiie, B., Triyoso, W., Andreas, H.
• Format: Conference Proceeding
• Language: English
• Subjects: Deformation; Plates (tectonics); Satellite observation; Velocity; Velocity distribution
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/1.4987069

Sulawesi microplate Island is located at famous triple junction area of the Eurasian, India–Australian, and Philippine Sea plates. Under the influence of the northward moving Australian plate and the westward motion of the Philippine plate, the island at Eastern part of Indonesia is collide and with the Eurasian plate and Sunda Block. Those recent microplate tectonic motions can be quantitatively determine by GNSS-GPS measurement. We use combine GNSS-GPS observation types (campaign type and continuous type) from 1997 to 2015 to derive newly velocity field of the area. Several strategies are applied and tested to get the optimum result, and finally we choose regional strategy to reduce error propagation contribution from global multi baseline processing using GAMIT/GLOBK 10.5. Velocity field are analyzed in global reference frame ITRF 2008 and local reference frame by fixing with respect alternatively to Eurasian plate - Sunda block, India–Australian plate and Philippine Sea plates. Newly results show dense distribution of velocity field. This information is useful for tectonic deformation studying in geospatial era.