California earthquakes

M3.0 earthquake 21 km SSW of Three Rocks, California

A magnitude 3.0 earthquake struck 21 km SSW of Three Rocks, California on Thu, Oct 28, 1982, 5:52 PM PDT (00:52 UTC), 11 km (7 mi) below the surface.

A larger quake followed: M3.7 16 km ESE of Tres Pinos, California. This one was a foreshock.

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Map

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

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The earthquake

Magnitude: 3.0 (ml), minor
Local time: Thu, Oct 28, 1982, 5:52 PM PDT
UTC: 1982-10-29 00:52:10 UTC
Depth: 10.5 km (6.5 mi), shallow
Epicenter: 36.337° N, 120.516° W
Region: California
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 0.3 km horizontally, 0.6 km in depth
Depth from: From location
Station coverage gap: 91°
Stations used: 71

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 154 in the 60 days after this one and 43 in the 30 days before it.

After

The first 60 of 154.

Before

Earthquakes today California earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1081080 (also filed as ci512069, usp0001qka). Read Wed, Sep 23, 2026, 2:07 PM UTC.