Sumatra

Studies focused on tectonic activity along the Sumatran Fault zone (SFZ), which traverses the entire 1900-km length of Sumatra, are still lacking. The SFZ is segmented and the slip rate varies for each segment, but rates are poorly known, particularly at the southern end of the SFZ.

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

Animation showing the 2000 to 2010 earthquakes and their rupture patches on the Sunda megathrust fault.

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

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