2026-06-18T07:38:51.79Z40.289501190185-124.328498840333.5299999713898manualconfirmedUSGS1.26md1Origin/20260618074039.777979.10055Magnitude/20260618074039.77804.10056USGS5 km SW of Petrolia, CAregion namenccatalognc75378931contributorID