2026-05-13T06:36:43.869045Z-54.60707092285156-28.80581665039062510manualconfirmedIAG5.104302661107499mb1Origin/20260513131846.46752.13927Magnitude/20260513131846.467588.13928earthquakeIAGSouth Sandwich Islands Regionregion nameusp2026jhrmcontributorID