2026-06-30T00:15:10.883307Z-55.48097991943359-27.6116123199462910manualconfirmedIAG4.939034611388185mb1Origin/20260630125728.632903.49063Magnitude/20260630125728.632979.49064earthquakeIAGSouth Sandwich Islands Regionregion nameusp2026mqxbcontributorID