1) The Indian Ocean tsunami warning system was established after the devastating 2004 tsunami to help detect future tsunamis and warn people.
2) The system works by sending seismic data from the Indian Ocean to warning centers in Hawaii and Japan to analyze if an earthquake could generate a tsunami, and then various methods are used to disseminate warnings to the public.
3) While the technology has not reached all regions yet, efforts by governments and community groups are helping to improve preparedness and save lives.