CONTRA COSTA COUNTY, CA — According to the U.S. Geological Survey, a preliminary 2.1 magnitude quake struck close to Danville on Saturday around midnight.

The tremor struck at 12:19 a.m., with its epicenter located approximately 1 mile southeast of Danville and a depth of 5 miles.

Did you feel it?

If you felt the earthquake, you can report it via the USGS Felt Report form.

Quakes past week

Last week, the area has experienced three tremors with a magnitude 2.5 or above. The biggest, a 3.0 magnitude earthquake, was registered close to Loyola four days ago.

The three largest earthquakes nearby in the last week:

• 3.0, west-southwest of Loyola on July 8
• 2.6, west-southwest of Loyola on July 8
• 2.5, southwest of Loyola on July 6

Source: The U.S. Geological Survey