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

The tremor shook 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 share your observations using the USGS Felt Report form. 4 people have submitted responses through the agency’s online form, reporting they experienced the quake.

Tremors past week

Over the last week, the area has experienced three quakes of magnitude 2.5 or higher. The biggest, a 3.0 magnitude earthquake, struck near 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