[G01-P] Poster

[G01-P-04] IGRS2013 Deformation Model: Linear Velocities and Co-seismic Deformation

^○Susilo Susilo^{1, 2}, Hasanuddin Z. Abidin^{1, 2}, Irwan Meilano², Endra Gunawan², Benyamin Sapiie³, Dina A. Sarsito², Heri Andreas², Dhota Pradipta², Antonius B. Wijanarto¹, Joni Efendi¹ (1.Geospatial Information Agency, Bogor, Indonesia, 2.Bandung Institute of Technology, Faculty of Earth Science and Technology, Geodesy Research Group, Bandung, Indonesia, 3.Bandung Institute of Technology, Faculty of Earth Science and Technology, Geodynamic Research Group, Bandung, Indonesia)

On October 11st, 2013, a new geodetic datum for Indonesia was defined by Geospatial Information Agency of Indonesia. The datum name is Indonesian Geospatial Reference System 2013 (IGRS2013). This is a semi dynamic datum which the reference epoch of geodetic control coordinate defined at 2012.0 and the change of coordinate due to plate tectonic motion and earthquakes should be accommodated by a deformation model. In this study we estimate a linear GPS velocities from time series coordinates starting from 1999 until end of 2016. We include also several earthquakes that have magnitude > M7 starting from 01 January 2000 until 12 December 2016 to estimate the co-sesimic deformation. Our estimate of linear velocities suggest that the GPS velocities shows the characterized of plate/block tectonic motion in the region. Moreover, our co-sesimic deformation suggest that most of Indonesia region affected by co-seismic deformation due to 2004 Sumatran-Andaman earthquake, 2005 Nias earthquake and 2012 Wharton Basin earthquake. The deformation model that consists a linear velocity and co-seismic deformation used to transform the coordinates from observation epoch to or from reference epoch of IGRS2013.

Keywords: Indonesia, IGRS2013, deformation model, linear velocities, co-sesimic deformation