The Indian Ocean tsunami warning system relies on two centers, the Pacific Tsunami Warning Center and a center in Japan, to analyze earthquake data and determine if a tsunami will occur and when it will arrive. If a tsunami is predicted, warnings are sent to countries in the Indian Ocean region through organizations like the Asian Disaster Preparedness Center to allow time for evacuation. This system was implemented after the deadly 2004 Indian Ocean tsunami to help detect future tsunamis and save lives through early warning.