The 2004 Indian Ocean earthquake, known by the scientific community as the Sumatra-Andaman earthquake, was an undersea earthquake that occurred at 00:58:53 UTC (07:58:53 local time) on December 26, 2004. According to the United States Geological Survey, the earthquake and its tsunami killed more than 283,100 people, making it one of the deadliest disasters in modern history. [2] The disaster is known in Asia and the media as the Asian Tsunami and also known in Australia, New Zealand, Canada, and the United Kingdom as the Boxing Day Tsunami because it took place on Boxing Day.

http://en.wikipedia.org/wiki/2004_Indian_Ocean_earthquake