2026-03-20T01:15:54.067362Z-61.64242172241211-56.6573562622070331manualconfirmedIAG5.036656401237945mb1Origin/20260320150003.841539.180517Magnitude/20260320150003.841622.180518earthquakeIAGSouth Shetland Islandsregion nameusp2026fmpucontributorID