2026-04-21T05:29:09.426903Z39.871803283691406143.697631835937510manualconfirmedIAG5.02346721493296mb1Origin/20260422193305.61733.80100Magnitude/20260422193305.61741.80101earthquakeIAGOff East Coast of Honshu, Japanregion nameusp2026htkfcontributorID