The powerful 9.1-magnitude earthquake off the coast of the Indonesian island of Sumatra, triggered a tsunami that killed around 230,000 people across a dozen countries.

Survivors and families of victims visited mass graves, lit candles and comforted one another across Southeast and South Asia in ceremonies to mark the disaster that killed some 230,000 people.

On Dec. 26, 2004, an earthquake-triggered tsunami raced across the Indian Ocean with 40-foot-high waves slamming into India, Thailand, Indonesia and several other countries, killing at least 225,000 people and leaving thousands injured.

Triggered by a 9.1 magnitude earthquake off the coast of the Indonesian island of Sumatra, the catastrophic event was the deadliest tsunami in recorded history.

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.At the time of the earthquake,

Thailand marks 20 years since the 2004 Indian Ocean tsunami A 9.1 magnitude earthquake struck off the coast of the Indonesian island of Sumatra on Dec. 26, 2004, triggering a tsunami that killed around 230,