2026-09-21T22:41:51.82Z40.30350112915-124.5358352661110.460000038147manualconfirmedUSGS2.5md1Origin/20260921224414.625178.117519Magnitude/20260921224414.625237.117520USGS21 km W of Petrolia, CAregion namenccatalognc75439702contributorID