Moderate 4.2 quake hits near San Ramon, Contra Costa County, California, USA

An earthquake of magnitude 4.2 occurred in the morning on Monday, February 2nd, 2026, at 7:01 am local time near San Ramon, Contra Costa County, California, USA, as reported by the United States Geological Survey.
According to preliminary data, the quake was located at a very shallow depth of 5.6 miles. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
Based on the preliminary seismic data, the quake was probably felt by many people in the area of the epicenter. It should not have caused significant damage, other than objects falling from shelves, broken windows, etc.
In San Ramon (pop. 76,100) located 3 miles from the epicenter, Dublin (pop. 57,700) 4 miles away, and Danville (pop. 44,400) 6 miles away, the quake should have been felt as light shaking.
Weak shaking might have been felt in Pleasanton (pop. 79,500) located 8 miles from the epicenter, Hayward (pop. 158,300) 10 miles away, Livermore (pop. 88,100) 11 miles away, San Leandro (pop. 90,700) 12 miles away, and San Francisco (pop. 827,500) 26 miles away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include San Jose (pop. 997,400) located 29 miles from the epicenter, and Sacramento (pop. 524,900) 62 miles away.

Earthquake data:
Date & time: Feb 2, 2026 07:01 am (GMT -8) local time (2 Feb 2026 15:01 GMT)
Magnitude: 4.2
Depth: 9.00 km
Epicenter latitude / longitude: 37.76°N / 121.94°W (Contra Costa County, California, United States)
Primary data source: USGS
https://www.volcanodiscovery.com/earthquake/news/293683/Moderate-42-quake-hits-near-San-Ramon-Contra-Costa-County-California-USA.html