2026-09-04T05:52:15.83Z40.223331451416-124.155334472662.289999961853manualconfirmedUSGS1.82md1Origin/20260904055414.142088.74836Magnitude/20260904055414.142149.74837USGS16 km SE of Petrolia, CAregion namenccatalognc75429527contributorID