Survivors and victims' relatives will this 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.

In 2004, an earthquake in the Indian Ocean released energy equivalent to 23,000 Hiroshima type atomic bombs. 20 years later, we examine the disaster and its toll.

The day after Christmas in 2004, a 9.1 magnitude earthquake under the Indian Ocean triggered tsunami waves that killed some 230,000 people across a dozen countries.

A relative of a victim of a 2004 Indian Ocean tsunami participates in its 20th anniversary at Tsunami Memorial Park at Ban Nam Khem, Takuapa district of Phang Nga province, southern Thailand ...

The magnitude-9.1 earthquake of Dec. 26, 2004, 150 miles off the coast of the Indonesian island of Sumatra, packed the energy of 23,000 atomic bombs, according to National Geographic.

Trauma lingers on for survivors of the deadly 2004 Indian Ocean tsunami. ... after a 9.1 magnitude earthquake off the west coast of Indonesia's Sumatra island. ... Along Thailand's Andaman coast, ...

Prayers and tears mark 20 years since the Indian Ocean tsunami that killed some 230,000 people The powerful earthquake off the coast of the Indonesian island of Sumatra on Dec. 26, 2004, triggered ...

Survivors and victims' relatives will this 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 ...