2004 Indian Ocean Tsunami

The 2004 Indian Ocean earthquake (magnitude 9.1 to 9.3) and subsequent tsunami killed 227,898 people in 14 countries — Indonesia, Sri Lanka, India, and Thailand suffering the worst — and displaced 1.7 million people. The tsunami waves reached up to 30 metres in height and the disaster was the first in the modern era captured extensively on video, transforming global understanding of tsunami risk and driving investment in early warning systems across the Indian Ocean.