The earthquake data are constrained by Global Positioning System (GPS) measurements at a Phuket site (Vigny et al., 2005). As the 26 December 2004 Earthquake caused a major movement of the Phuket site to the West, an increase in the arthquake activities in Southern Thailand could be also observed. However, the 28 March 2005 Earthquake did not cause any major
movement of the Phuket site, and consequently there was not a significant increase of the earthquake activities in Southern Thailand