M2.1 earthquake 1km WNW of Danville, CA

A magnitude 2.1 earthquake struck 1km WNW of Danville, CA on Sun, May 2, 2021, 1:51 PM PDT (20:51 UTC), 7 km (5 mi) below the surface.

A larger quake followed: M3.9 3km N of San Lorenzo, CA. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

3 people reported to the USGS what they felt; the strongest reported shaking was III, weak shaking.

Reviewed by a seismologist.

Distance and direction from each place to the epicenter, with its forecast.

Within 100 km, magnitude 1.5 and up: 74 in the 60 days after this one and 27 in the 30 days before it.

The first 60 of 74.

From the USGS Earthquake Hazards Program and its partner networks, event nc73557300. Read Sun, Oct 4, 2026, 6:33 AM UTC.