A very deep M6.8 occurred south of the Fiji Islands at 09:38 UTC at a depth of 628 km (390 miles). The earthquake was followed by this M7.0 earthquake at 09:51 UTC at a depth of 665 km (413 miles). Once this larger earthquake occurred, the M6.8 is considered a foreshock. This mainshock was then followed by a M6.6 aftershock at 10:14 UTC at a depth of 623 km (387 miles). The epicenters were located about 845.4 km (525.3 miles) SW of Vaini, Tonga, and 870.2 km (540.7 miles) S of Suva, Fiji. There is no risk of a tsunami from earthquakes at this depth.