California earthquakes

M1.8 earthquake 10 km SSW of Ferndale, California

A magnitude 1.8 earthquake struck 10 km SSW of Ferndale, California on Wed, Dec 16, 1981, 9:50 AM PST (17:50 UTC), 27 km (17 mi) below the surface.

A larger quake followed: M2.5 41 km WSW of Ferndale, California. This one was a foreshock.

Ferndale 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 (md), micro
Local time
UTC
1981-12-16 17:50:03 UTC
Depth
27.0 km (16.8 mi), shallow
Epicenter
40.490° N, 124.322° 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 0.8 km horizontally, 0.8 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
163°
Stations used
17

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 109 in the 60 days after this one and 47 in the 30 days before it.

After

The first 60 of 109.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1070376. Read Tue, Sep 22, 2026, 9:33 PM UTC.