California earthquakes

M3.0 earthquake 38 km SW of Ferndale, California

A magnitude 3.0 earthquake struck 38 km SW of Ferndale, California on Sat, Jun 20, 1981, 11:25 AM PDT (18:25 UTC), 23 km (14 mi) below the surface.

A larger quake followed: M3.1 59 km WSW of Ferndale, California. This one was a foreshock.

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Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
3.0 (md), minor
Local time
UTC
1981-06-20 18:25:50 UTC
Depth
22.7 km (14.1 mi), shallow
Epicenter
40.323° N, 124.582° 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 1.5 km horizontally, 0.8 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
255°, poorly surrounded by stations
Stations used
24

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 139 in the 60 days after this one and 60 in the 30 days before it.

After

The first 60 of 139.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1064721. Read Tue, Sep 22, 2026, 11:21 PM UTC.