California earthquakes

M2.1 earthquake 28 km WSW of Ferndale, California

A magnitude 2.1 earthquake struck 28 km WSW of Ferndale, California on Sat, Aug 21, 1982, 9:27 AM PDT (16:27 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M3.6 80 km W of Ferndale, 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
2.1 (md), micro
Local time
UTC
1982-08-21 16:27:50 UTC
Depth
21.4 km (13.3 mi), shallow
Epicenter
40.510° N, 124.590° 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 2.5 km horizontally, 0.5 km in depth
Magnitude uncertainty
±0.08
Depth from
From location
Station coverage gap
272°, poorly surrounded by stations
Stations used
22

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 132 in the 60 days after this one and 48 in the 30 days before it.

After

The first 60 of 132.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1077852. Read Wed, Sep 30, 2026, 5:41 PM UTC.