A powerful earthquake has been reported off the South Pacific island of Vanuatu at a depth of 41 km with no immediate reports of damage, the BBC said. The magnitude 7.1 quake occurred at 03:55 local time, 63km south of the capital, Port-Vila, the US Geological Survey said. The Pacific Tsunami Warning Center ruled out a Pacific-wide tsunami. Several powerful aftershocks later struck the same area, at least one with a magnitude of 7.0. The US Geological Survey earlier said the first quake was of a 7.5 magnitude.