The Indian Ocean tsunami, also known as the Boxing Day tsunami, occurred on December 26, 2004, and was one of the deadliest natural disasters in recorded history. It was triggered by a massive undersea earthquake with a magnitude of 9.1–9.3 off the western coast of northern Sumatra, Indonesia. The earthquake caused the seafloor to uplift, displacing a massive volume of water and generating powerful tsunami waves. The tsunami waves radiated across the Indian Ocean, affecting the coastlines of 14