2026-04-06T06:45:10.543Z31.7549135.885410manualconfirmedUSGS4.9mb1Origin/20260406070514.725314.680520Magnitude/20260406070514.725401.6805212026-04-06T06:56:24.151428Z2026-04-06T07:05:15.029916ZSoutheast of Shikoku, Japanregion nameOrigin/20260406070514.725314.680520