2026-04-20T12:56:46.082227Z39.73331832885742143.308227539062510manualconfirmedIAG5.332647461475933mb1Origin/20260422202431.011068.80600Magnitude/20260422202431.011129.80601earthquakeIAGOff East Coast of Honshu, Japanregion nameusp2026hsdlcontributorID