SuGAr has been observing surface deformation in Sumatra since 2002.
Block-diagram showing a cross-section of the Sunda Megathrust. The Indo-Australian tectonic plate (on the left) dives under the Eurasian plate (on the right).
Dark red lines show Sumatran fault zone (after Sieh and Natawidjaja, 2000); red line with teeth shows
Talk by Prof Kerry Sieh during NTU-SST Flagship Programme, June 2012.
Media Briefing by Director Kerry Sieh on the September 2007 earthquakes offshore Sumatra.
Animation produced by the Tectonics Observatory, California Institute of Technology. Labels modified by EOS. Read more about earthquakes and tsunamis in Sumatra at siaga.org
This cross-section image shows the origin of the September 30, 2009 earthquake (upper green star) and an aftershock.