Crustal deformation and interplate coupling from GPS observation in the West-Java Indonesia

The Sunda trench plate boundaries along Sumatra have the potential to generate large thrust-type earthquakes. While less frequent and smaller events occur along Java where subduction of older seafloor takes place relatively aseismically. This latest need further investigation since 3 deadly earthquakes occurred for the last 4 years. The first once is the Yogyakarta May 2006 Earthquake then the Pangandaran July 2006 tsunami earthquake and the last one West Java 2009 earthquake. Java trench might have a unique earthquake potential. Therefore, more research is needed related to the 2009 earthquake in West Java to obtain a deep understanding of the mechanisms of subduction beneath the Java Island and its surrounding areas.