Green earthquake (Magnitude 4.8M, Depth:272.579km) in Tonga Islands 20/06/2026 16:59 UTC, No people affected in 100km.. On 6/20/2026 4:59:20 PM, an earthquake occurred in Tonga Islands potentially affecting No people affected in 100km. The earthquake had Magnitude 4.8M, Depth:272.579km.