An earthquake with a preliminary magnitude of 6.5 has been recorded in the south Pacific, the U.S. Geological Survey said on Saturday . 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.