2026-06-17T10:27:57.94Z40.40633392334-124.5323333740218.030000686646manualconfirmedUSGS2.1md1Origin/20260617103045.023847.379Magnitude/20260617103045.023909.380USGS23 km WNW of Petrolia, CAregion namenccatalognc75378456contributorID