Small magnitude 3.8 quake hits 6 miles southeast of Brentwood, California, United States early evening
3.8 quake 28 Feb 6:21 pm (GMT -8)

An earthquake of magnitude 3.8 occurred only 5 minutes ago 6 miles southeast of Brentwood, California, United States, the United States Geological Survey reported.
The quake hit at a shallow depth of 7.2 miles beneath the epicenter near Brentwood, Contra Costa County, California, USA, early evening on Wednesday, February 28th, 2024, at 6:21 pm local time. 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.
Our monitoring service identified a second report from the European-Mediterranean Seismological Centre (EMSC) which listed the quake at magnitude 3.8 as well.
Based on the preliminary seismic data, the quake should not have caused any significant damage, but was probably felt by many people as light vibration in the area of the epicenter.
Weak shaking might have been felt in Discovery Bay (pop. 13,400) located 0 miles from the epicenter, Brentwood (pop. 59,000) 6 miles away, Oakley (pop. 39,800) 9 miles away, and Antioch (pop. 110,500) 13 miles away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Tracy (pop. 87,100) located 15 miles from the epicenter, Stockton (pop. 305,700) 17 miles away, Pittsburg (pop. 69,400) 18 miles away, Livermore (pop. 88,100) 18 miles away, San Jose (pop. 1,026,900) 43 miles away, and Sacramento (pop. 490,700) 47 miles away.


Earthquake data:
Date & time: Feb 28, 2024 06:21 pm (Los Angeles time) local time (29 Feb 2024 02:21 GMT)
Magnitude: 3.8
Depth: 11.6 km
Epicenter latitude / longitude: 37.91°N / 121.6°W (Contra Costa, California, United States)
Primary data source: USGS
https://www.volcanodiscovery.com/earthquake/news/235452/Small-magnitude-38-quake-hits-6-miles-southeast-of-Brentwood-California-United-States-early-evening-.html