2026-04-26T20:23:54.935985Z42.679481506347656143.236648559570381.13700103759766manualconfirmedIAG5.967101102928803Mw(mB)1Origin/20260427131152.020631.2867Magnitude/20260427131152.020695.2868earthquakeIAGHokkaido, Japan Regionregion nameusp2026idrfcontributorID