2025-03-23T16:16:13.25Z37.8048324584961-121.92099761962914.960000038147manualconfirmedUSGS1.81md1Origin/20250323161834.162905.190677Magnitude/20250323161834.162957.190678USGS2 km SW of Blackhawk, CAregion namenccatalognc75153907contributorID