On Dec. 26, 2004, a 9.1 magnitude earthquake struck off the west coast of Sumatra, causing a massive wave that devastated Asian coastal communities across thousands of miles.

Survivors and victims' relatives will next week mark the 20th anniversary of the 2004 Indian Ocean earthquake and tsunami, which killed more than 220,000 people across more than a dozen countries.

Tsunami-hit nations will next week commemorate the more than 220,000 people who died in the Boxing Day disaster two decades ago, when huge waves tore into coastal communities around the Indian Ocean.An undersea 9.