QuickTime animation of 2004 Indian Ocean tsunami waves generated by the December 26, 2004 Sumatra – Andaman Islands great earthquake. The magnitude 9.2 great earthquake in the Sunda Trench occurred along the subduction zone between the India – Australia Plate and the southeastern corner of the Eurasian Plate. During the earthquake, the ocean floor in the Sunda Trench was offset and uplifted a column of ocean water producing an elongated mound of ocean water at the surface of the Indian Ocean. That mound of water then propagated to eastward toward northern Sumatra and Thailand and also westward toward Sri Lanka and India.
This animation was developed by scientists at NOAA’s Pacific Marine Environmental Laboratory in Seattle.