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,

Banlue Choosin has been monitoring the seas around Thailand's southern Phang Nga province for signs of abnormality for nearly two decades. The 59-year-old is a former fisherman, and his experience and knowledge of the sea are why his coastal community in Ban Nam Khem village relies on him to monitor nearby waters after earthquakes.

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.

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,