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, 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 ...

The powerful earthquake off the coast of the Indonesian ... water on a stone marking a mass grave of victims of the 2004 Indian Ocean tsunami in Banda Aceh, Indonesia, on Thursday.

On Dec. 26, 2004, a 9.1-magnitude earthquake beneath the Indian Ocean triggered a tsunami with waves up to 100 feet high, killing an estimated 230,000 people. Twenty years later, people gathered ...

Within 20 minutes, waves of water began to hit the coasts of surrounding islands. In Indonesia's Aceh province in Northern ...

A 6.2 magnitude earthquake struck Aceh province, triggering panic among residents still traumatized by the 2004 tsunami.

Tsunami-hit nations will next week commemorate ... There was no warning system in the Indian Ocean in 2004 but today a sophisticated network of monitoring stations has cut down warning times.

About 20 minutes after the earthquake, the resulting tsunami reached the coastline of ... It was a mess of improvised warnings that came too late for many in the Indian Ocean. “I can simply say that ...

saw a surge of reconstruction after the disaster Survivors and victims' relatives will this week mark the 20th anniversary of the 2004 Indian Ocean earthquake and tsunami, which killed more than ...

Sirens sounded across the city for three minutes to mark the time of the earthquake. Relatives of victims of the 2004 Indian Ocean tsunami hold a candle light vigil as they participate on the 20th ...