Tsunami spreads across the Indian Ocean, affecting many countries

Vasily V. Titov, Associate Director, Tsunami Inundation Mapping Efforts (TIME), NOAA/PMEL - UW/JISAO

The first three hours of the tsunami spread outward into the Bay of Bengal toward Sri Lanka and India and to the east toward Sumatra and Thailand.

Credit: U.S. Geological Survey

The tsunami arrives in Thailand.

Credit: David Rydevik, worldwide public domain

Tsunami devastation in Sumatra.

Credit: Ying Ying Huang, U.S. Geological Survey. Public domain.