2026-05-27T21:16:14.66Z38.638668060303-123.08816528323.4400000572205manualconfirmedUSGS1.83md1Origin/20260527211842.246276.95689Magnitude/20260527211842.246334.95690USGS17 km NNW of Guerneville, CAregion namenccatalognc75370012contributorID