2026-04-20T07:52:59.3Z39.874143.00229.2manualconfirmedGFZ7.37Mw1Origin/20260420110009.221848.52125Magnitude/20260420110009.221903.52126earthquakeGFZOff East Coast of Honshu, Japanregion namegfz2026hrtlcontributorID