California earthquakes

M2.4 earthquake 3km NE of Yucaipa, CA

A magnitude 2.4 earthquake struck 3km NE of Yucaipa, CA on Tue, Dec 29, 1981, 6:38 AM PST (14:38 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M2.7 8km SSE of Palomar Observatory, CA. This one was a foreshock.

Yucaipa forecastMore in California

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
2.4 (ml), micro
Local time
UTC
1981-12-29 14:38:51 UTC
Depth
10.1 km (6.3 mi), shallow
Epicenter
34.055° N, 117.025° 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 0.3 km horizontally, 0.6 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
26°
Stations used
55

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 160 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 160.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci104019. Read Tue, Sep 22, 2026, 8:51 PM UTC.