2026-06-04T17:53:52.93Z40.405498504639-124.85966491699-0.37manualconfirmedUSGS2.01md1Origin/20260604175527.575883.53785Magnitude/20260604175527.575945.53786USGS50 km W of Petrolia, CAregion namenccatalognc75370826contributorID