California earthquakes

M1.8 earthquake 14km N of Cabazon, CA

A magnitude 1.8 earthquake struck 14km N of Cabazon, CA on Thu, Dec 29, 1977, 2:26 AM PST (10:26 UTC), 16 km (10 mi) below the surface.

A larger quake followed: M2.3 11km SW of Corona, CA. This one was a foreshock.

Cabazon 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
1.8 (mh), micro
Local time
UTC
1977-12-29 10:26:30 UTC
Depth
15.9 km (9.9 mi), shallow
Epicenter
34.043° N, 116.797° 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, 0.5 km in depth
Depth from
From location
Station coverage gap
34°
Stations used
31

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 165 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 165.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci3337176. Read Tue, Sep 22, 2026, 8:45 PM UTC.