2026-03-18T16:11:56.76Z40.204666137695-124.1396636962911.489999771118manualconfirmedUSGS1.73md1Origin/20260318161335.986017.156925Magnitude/20260318161335.986103.156926USGS18 km SE of Petrolia, CAregion namenccatalognc75329622contributorID