According to the US Geological Survey the earthquake hit a part of the ocean about 227 kilometers southwest of Nadi. The agency also said that the quake is 10 kilometers deep.
People have been evacuating Nadi since the earthquake. Nadi, on Fiji's main island, is a hub for tourism.
A tsunami threat message was issued by the Pacific Tsunami Warning Centre after the quake hit at 11.52am local time. The warning centre later lifted the alert, saying the threat "had passed" while urging people to remain vigilant for minor fluctuations in sea level that could occur.