M1.8 earthquake 10km E of Clearlake, CA

A magnitude 1.8 earthquake struck 10km E of Clearlake, CA on Tue, Aug 3, 2021, 12:35 AM PDT (07:35 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M3.8 4km ENE of Talmage, CA. This one was a foreshock.

Map

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

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

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

Within 100 km, magnitude 1.5 and up: 183 in the 60 days after this one and 150 in the 30 days before it.

The first 60 of 183.

From the USGS Earthquake Hazards Program and its partner networks, event nc73604851. Read Sat, Oct 3, 2026, 4:59 PM UTC.