California earthquakes

M2.9 earthquake 7 km SSE of Three Rocks, California

A magnitude 2.9 earthquake struck 7 km SSE of Three Rocks, California on Mon, Feb 9, 1976, 3:28 PM PST (23:28 UTC), 9 km (6 mi) below the surface.

A larger quake followed: M4.3 Central 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
2.9 (md), micro
Local time
UTC
1976-02-09 23:28:41 UTC
Depth
9.4 km (5.8 mi), shallow
Epicenter
36.443° N, 120.358° W
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, 1.1 km in depth
Magnitude uncertainty
±0.51
Depth from
From location
Station coverage gap
117°
Stations used
32

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 189 in the 60 days after this one and 133 in the 30 days before it.

After

The first 60 of 189.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1028751. Read Wed, Sep 30, 2026, 6:45 AM UTC.