AN INVESTIGATION BY USING CORS TO DETECT THE COORDINATE REFERENCE FRAME DISTORTION IN TAIWAN

Abstract

Plate motion will cause earthquakes, volcanic eruptions and other natural disasters. Plate motion especially non-linear motion can also change the relationship between stations in the reference frame. Therefore, a rational and reliable reference frame is needed to ensure the Euclidean integrity quality. Taiwan is located along the bounding of the Eurasian and the Philippine plate, and is therefore a region of non-rigid motion and therefore will shift and rotate in different directions due to the changing stress field. ITRF2008 is a fixed single term linear model utilizing data across the 5 years span of 2003-2008. It is not able to precisely model the non-linear motion of the crustal in the Taiwan region, after the 1999 Jiji earthquake. This study will show the complex non-linear model that is necessary to describe the Taiwan region by constructing a Reference Frame over Taiwan from 21 Taiwan’s CORS stations.