2026-03-12T15:15:30.75Z40.192165374756-124.664833068850.54000002145767manualconfirmedUSGS1.86md1Origin/20260312151723.786453.95260Magnitude/20260312151723.786514.95261USGS35 km WSW of Petrolia, CAregion namenccatalognc75326507contributorID