2026-05-15T17:36:44.71Z40.254333496094-124.77050018310.64999997615814manualconfirmedUSGS2.29md1Origin/20260515173823.336734.35779Magnitude/20260515173823.336797.35780USGS42 km W of Petrolia, CAregion namenccatalognc75360961contributorID