"These maps show modeled maximum wave height (top) and travel time (lower) for the Indian Ocean Tsunami of December 26, 2004. Although the epicenter of the earthquake that triggered the tsunami was near the northern tip of Sumatra, the sea floor shifted along an arc stretching about 1200 km to the north. This shifting pushes a mass of water across the Indian Ocean."Citation source:

http://earthobservatory.nasa.gov/NaturalHazards/

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