People gathered in prayer and visited mass graves in Indonesia's Aceh province on Thursday to mark 20 years since the massive Indian Ocean tsunami hit the region in one of modern history's worst ...

Some 6,000 aftershocks followed. The tsunami that rose from this great shifting of tectonic plates reached over 115 feet in some places and ultimately killed about 230,000 people in Indonesia ...

In 2004, a 9.1 magnitude earthquake off the island of Sumatra in western Indonesia triggered a tsunami in the Indian Ocean that killed more than 220,000 people across 12 countries. Ali Rogin ...

Sirachai Arunrugstichai/Getty Thousands gathered in mourning on Thursday, Dec. 26, to mark two decades since the world’s largest tsunami. On Dec. 26, 2004, in one of the worst natural ...

The resulting tsunami unleashed waves more than 100 feet high and as fast as an airliner. Within hours, the tsunami had claimed nearly 230,000 human lives and displaced millions of people in 12 ...

On Boxing Day 2004, an earthquake in the Indian Ocean near Indonesia set off a tsunami which killed almost 250,000 people. It was the deadliest natural disaster this century, and was probably the ...