California earthquakes

M3.0 earthquake 12 km S of Three Rocks, California

A magnitude 3.0 earthquake struck 12 km S of Three Rocks, California on Mon, Nov 15, 1976, 10:11 AM PST (18:11 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M4.6 20 km SSE 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: Mon, Nov 15, 1976, 10:11 AM PST
UTC: 1976-11-15 18:11:17 UTC
Depth: 7.9 km (4.9 mi), shallow
Epicenter: 36.389° N, 120.393° 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 0.5 km horizontally, 1.0 km in depth
Depth from: From location
Station coverage gap: 67°
Stations used: 47

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 174 in the 60 days after this one and 62 in the 30 days before it.

After

The first 60 of 174.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1032299 (also filed as ci151929, usp0000kbf). Read Wed, Sep 30, 2026, 7:44 AM UTC.