2026-04-06T13:09:27.377402Z-57.55153274536133-30.53479957580566410manualconfirmedIAG5.029001211827832mb1Origin/20260406150123.704457.156611Magnitude/20260406150123.704533.156612earthquakeIAGSouth Sandwich Islands Regionregion nameusp2026gsowcontributorID