
The offshore quake hit at 3:00 pm (0200 GMT) and was centred around 287 kilometres (178 miles) east of Suva, at a depth of 538 kilometres, the US Geological Survey (USGS) said.
The Hawaii-based Pacific Tsunami Warning Center did not immediately issue any warnings.
The quake occurred in the so-called Pacific Ring of Fire, a region of frequent seismic activity due to collisions between continental plates.