The U.S. Geological Survey says an earthquake with a preliminary magnitude of 6.5 has been recorded in the south Pacific.
The agency's National Earthquake Information Center said the tremor was at 0748 GMT Saturday. It was centered 322 kilometers (199 miles) west-northwest of Neiafu, Tonga, and 438 kilometers (271 miles) east of Lambasa, Fiji.
There were no immediate reports of damage.
The Pacific Tsunami Warning Center did not issue a warning, explaining that the quake was centered too far underground.