2026-09-21T22:34:41.35Z36.736000061035-121.431167602547.6599998474121manualconfirmedUSGS1.72md1Origin/20260921223710.516952.117475Magnitude/20260921223710.517017.117476USGS10 km SW of Ridgemark, CAregion namenccatalognc75439692contributorID