The United States Geological Survey reported a magnitude 2.9 quake in the United States near San Ramon, Contra Costa County, California, 36 minutes ago. The earthquake hit early morning on Monday, December 8th, 2025, at 5:21 am local time at a very shallow depth of 5.3 miles. Magnitude and other quake parameters can still change in the coming hours as the agency continues to process seismic data.A second report was later issued by The Incorporated Research Institutions for Seismology (IRIS), which listed it as a magnitude 2.9 earthquake as well. A third agency, the European-Mediterranean Seismological Centre (EMSC), reported the same quake at magnitude 2.7.Towns or cities near the epicenter where the quake might have been felt as very weak shaking include San Ramon (pop. 76,100) located 3 miles from the epicenter, Dublin (pop. 57,700) 4 miles away, Danville (pop. 44,400) 6 miles away, Pleasanton (pop. 79,500) 7 miles away, Castro Valley (pop. 61,400) 9 miles away, Hayward (pop. 158,300) 10 miles away, and Livermore (pop. 88,100) 11 miles away. In San Francisco (pop. 827,500, 26 miles away), and San Jose (pop. 997,400, 29 miles away), the quake was probably not felt.Earthquake data: Date & time: Dec 8, 2025 05:21 am (GMT -8) local time (8 Dec 2025 13:21 GMT)Magnitude: 2.9Depth: 8.52 kmEpicenter latitude / longitude: 37.75°N / 121.94°W (Contra Costa County, California, United States)Primary data source: USGS