On the morning of December 26th, 2004, a massive earthquake struck the west coast of Sumatra, Indonesia, triggering an enormous tsunami that hit Indonesia, Sri Lanka, India, Thailand, and more. Killing at least 275,000 people, and impacting 20 countries, it remains the deadliest natural disaster of the 21st Century. But what exactly caused the earthquake and subsequent tsunami? How did it hit with no warning? And has enough been done to limit the effects of such an event if it happens again?

This is a Short History Of the Indian Ocean Tsunami.

Written by Lindsay Galvin. With thanks to Jose Borrero - a coastal and environmental scientist, and Tsunami Hazards specialist. 

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