California earthquakes

M2.6 earthquake 45 km WNW of Samoa, California

A magnitude 2.6 earthquake struck 45 km WNW of Samoa, California on Thu, Nov 20, 1980, 4:45 AM PST (12:45 UTC), 24 km (15 mi) below the surface.

A larger quake followed: M3.0 105 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
2.6 (md), micro
Local time
UTC
1980-11-20 12:45:10 UTC
Depth
24.5 km (15.2 mi), shallow
Epicenter
40.979° N, 124.683° 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 0.6 km horizontally, 8.8 km in depth
Depth from
From location
Station coverage gap
279°, poorly surrounded by stations
Stations used
19

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 200 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 200.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1057309. Read Tue, Sep 22, 2026, 5:15 PM UTC.