International ocean drilling expedition to understand causes of the Indian Ocean 2004 earthquake and tsunami

The devastating earthquake that struck North Sumatra and the Andaman and Nicobar Islands on Boxing Day in 2004 caused a tsunami that inundated coastal communities around the Indian Ocean, killing over 250,000 people in 14 countries. That earthquake was caused by a slip on a subduction zone plate boundary fault beneath the eastern Indian Ocean, say scientists.

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