US Geological Survey says an earthquake struck off the coast of New Caledonia in the southern Pacific at around 3:18 PM Wednesday local time, or 4:18 UTC.
The quake originated at a depth of 10 kilometers. The USGS revised the magnitude from a preliminary 7.6 to 7.5.
The Pacific Tsunami Warning Center in Hawaii says tsunami waves of up to 3 meters could hit New Caledonia and Vanuatu, and those of up to one meter could hit Fiji.
The center also says up to 0.3 meter changes above tide levels could be observed in other Pacific islands, Australia and Hawaii