shakemap
A 6.9 magnitude earthquake shook the South Pacific Saturday west-northwest of Tonga, the USGS reported. USGS

(Reuters) - A magnitude 6.9 earthquake struck in the South Pacific on Saturday, 186 miles (300 km) west-northwest of Tonga, the U.S. Geological Survey said.

There was no immediate tsunami alert following the quake, according to the Pacific Tsunami Warning Center. The quake was 259 miles (417 km) deep, according to USGS.