2025-12-21T20:40:49.3Z36.7861671447754-121.409835815437.19000005722046manualconfirmedUSGS3.46ml1Origin/20251221204411.138071.18595Magnitude/20251221204411.138118.18596USGS5 km SW of Ridgemark, CAregion namenccatalognc75284286contributorID