2026-05-15T20:38:05.8Z40.588665008545-122.7151641845749.54999923706manualconfirmedUSGS2.55md1Origin/20260515203958.469443.36987Magnitude/20260515203958.469502.36988USGS15 km SSW of French Gulch, CAregion namenccatalognc75361026contributorID