M1.9 earthquake 14km WNW of Anza, CA

A magnitude 1.9 earthquake struck 14km WNW of Anza, CA on Fri, Sep 3, 2021, 10:24 PM PDT (05:24 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M3.4 10km NNW of Anza, CA. This one was a foreshock.

Map

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

2 people reported to the USGS what they felt; the strongest reported shaking was II, 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: 138 in the 60 days after this one and 81 in the 30 days before it.

The first 60 of 138.

From the USGS Earthquake Hazards Program and its partner networks, event ci40032208. Read Sun, Oct 4, 2026, 11:01 AM UTC.