California earthquakes

M2.3 earthquake 23 km SW of Ferndale, California

A magnitude 2.3 earthquake struck 23 km SW of Ferndale, California on Tue, Dec 14, 1982, 11:04 AM PST (19:04 UTC), 25 km (16 mi) below the surface.

A larger quake followed: M3.6 5 km W of Hydesville, 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
2.3 (md), micro
Local time
UTC
1982-12-14 19:04:48 UTC
Depth
25.2 km (15.7 mi), shallow
Epicenter
40.446° N, 124.475° 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 2.3 km horizontally, 1.1 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
273°, poorly surrounded by stations
Stations used
15

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 98 in the 60 days after this one and 52 in the 30 days before it.

After

The first 60 of 98.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1083106. Read Tue, Sep 22, 2026, 10:24 PM UTC.