California earthquakes

M1.8 earthquake 16km ENE of Coso Junction, CA

A magnitude 1.8 earthquake struck 16km ENE of Coso Junction, CA on Sun, Dec 13, 1981, 10:36 PM PST (06:36 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M3.6 14km ENE of Coso Junction, CA. 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
1.8 (mc), micro
Local time
UTC
1981-12-14 06:36:10 UTC
Depth
4.0 km (2.5 mi), shallow
Epicenter
36.097° N, 117.778° 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 1.2 km horizontally, 2.6 km in depth
Depth from
From location
Station coverage gap
187°, poorly surrounded by stations
Stations used
6

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 107 in the 60 days after this one and 58 in the 30 days before it.

After

The first 60 of 107.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci103159. Read Tue, Sep 22, 2026, 10:25 PM UTC.