California earthquakes

M3.4 earthquake 7 km S of Mesa, California

A magnitude 3.4 earthquake struck 7 km S of Mesa, California on Wed, Dec 22, 1982, 1:40 AM PST (09:40 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M3.9 2 km ESE of Mammoth Lakes, 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: 3.4 (md), minor
Local time: Wed, Dec 22, 1982, 1:40 AM PST
UTC: 1982-12-22 09:40:49 UTC
Depth: 2.3 km (1.4 mi), shallow
Epicenter: 37.349° N, 118.553° 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 5.3 km horizontally, 8.1 km in depth
Magnitude uncertainty: ±0.13
Depth from: From location
Station coverage gap: 298°, poorly surrounded by stations
Stations used: 9

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 200 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 200.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1083354 (also filed as usp0001rn4, ci512382). Read Tue, Sep 22, 2026, 8:22 PM UTC.