The tsunami warning was later lifted. The magnitude of the earthquake was also revised to 6.9, down from an earlier estimate of 7.2 magnitude. A 7.2 magnitude earthquake off Vanuatu triggered a tsunami warning on Saturday, the Pacific Tsunami Warning Centre said."Based on the preliminary earthquake parameters... hazardous tsunami waves are possible for coasts located within 300 KM of the earthquake epicenter," the Hawaii-based monitor warned after the shallow quake in waters.