California earthquakes

M2.9 earthquake 10 km SW of Huron, California

A magnitude 2.9 earthquake struck 10 km SW of Huron, California on Wed, Dec 21, 1983, 3:53 AM PST (11:53 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M2.9 12 km ESE of Coalinga, 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: Wed, Dec 21, 1983, 3:53 AM PST
UTC: 1983-12-21 11:53:42 UTC
Depth: 9.7 km (6.0 mi), shallow
Epicenter: 36.142° N, 120.196° 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, 0.5 km in depth
Magnitude uncertainty: ±0.14
Depth from: From location
Station coverage gap: 141°
Stations used: 38

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 197 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 197.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1108805 (also filed as ci27517, usp00020pf). Read Tue, Sep 22, 2026, 7:25 AM UTC.