2026-05-27T21:37:32.755917Z-57.77875137329102-26.48341560363769510manualconfirmedIAG4.850482687071072mb1Origin/20260528130812.318197.102513Magnitude/20260528130812.318262.102514earthquakeIAGSouth Sandwich Islands Regionregion nameusp2026kikgcontributorID