California earthquakes

M2.3 earthquake 29 km WNW of Three Rocks, California

A magnitude 2.3 earthquake struck 29 km WNW of Three Rocks, California on Thu, Jan 20, 1983, 8:56 PM PST (04:56 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M4.2 37 km SSW of South Dos Palos, 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
2.3 (md), micro
Local time
UTC
1983-01-21 04:56:49 UTC
Depth
5.4 km (3.3 mi), shallow
Epicenter
36.593° N, 120.706° 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 1.3 km horizontally, 0.8 km in depth
Magnitude uncertainty
±0.17
Depth from
From location
Station coverage gap
203°, poorly surrounded by stations
Stations used
36

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 152 in the 60 days after this one and 77 in the 30 days before it.

After

The first 60 of 152.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1086402. Read Tue, Sep 29, 2026, 8:38 PM UTC.