Crustal motion and block behaviour in SE-Asia from GPS measurements

Results acquired using global positioning system (GPS) data taken over a large part of SEAsia, indicate that Sundaland, i.e. Indochina along with the western and central part of Indonesia, constitutes a stable tectonic block moving approximately east with respect to Eurasia at a velocity of 12±3 mm yr-1. With respect to India and Australia this block moves due south. Significant motion has not been detected along the northern boundary to South China i.e. along the Red River Fault, whereas nearly 50 mm yr-1 of right lateral motion has to be accommodated between India and Sundaland in the Andaman¯Burma region.