2026-06-01T17:25:02.99Z40.322666168213-124.3861694335925.989999771118manualconfirmedUSGS2.17md1Origin/20260601172845.436041.29797Magnitude/20260601172845.436105.29798USGS9 km W of Petrolia, CAregion namenccatalognc75369341contributorID