Green earthquake (Magnitude 4.5M, Depth:231.662km) in South Sandwich Islands Region 23/06/2026 17:08 UTC, No people affected in 100km.. On 6/23/2026 5:08:55 PM, an earthquake occurred in South Sandwich Islands Region potentially affecting No people affected in 100km. The earthquake had Magnitude 4.5M, Depth:231.662km.