There were no immediate reports of casualties or damage due to the earthquake that struck at 19:03 local time, Xinhua news agency reported.
According to the USGS, the epicenter of the earthquake was determined at 14.609 degrees south latitude and 167.249 degrees east longitude, at a depth of 156.7 km.
The Pacific Tsunami Warning Center did not immediately issue a tsunami warning based on the earthquake.
Pacific island countries such as Fiji, Tonga and Vanuatu lie on the so-called Pacific 'Ring of Fire', an arc of earthquake and volcanic zones where continental plates collide, often causing seismic activity.
According to the USGS, the epicenter of the earthquake was determined at 14.609 degrees south latitude and 167.249 degrees east longitude, at a depth of 156.7 km.
The Pacific Tsunami Warning Center did not immediately issue a tsunami warning based on the earthquake.
Pacific island countries such as Fiji, Tonga and Vanuatu lie on the so-called Pacific 'Ring of Fire', an arc of earthquake and volcanic zones where continental plates collide, often causing seismic activity.