In the 2012 Banda Aceh earthquake of 8.4 magnitude , the system alerted the Indian islands on Andaman and Nicobar within 8 minutes . Some tsunami warning sirens in Aceh were delayed by about 20 minutes due to failure of the electrical grid caused by the proximity of the earthquake , and evacuation routes in Banda Aceh were jammed with traffic
2012 Banda Aceh earthquake
2012 Indian Ocean earthquakes
Indian Ocean Tsunami Warning System