California earthquakes

M1.7 earthquake 13 km WNW of Samoa, California

A magnitude 1.7 earthquake struck 13 km WNW of Samoa, California on Sat, Feb 3, 1979, 5:11 AM PST (13:11 UTC), 24 km (15 mi) below the surface.

A larger quake followed: M1.8 11 km WNW of Samoa, 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
1.7 (md), micro
Local time
UTC
1979-02-03 13:11:25 UTC
Depth
23.7 km (14.7 mi), shallow
Epicenter
40.870° N, 124.332° 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 1.9 km horizontally, 0.8 km in depth
Depth from
From location
Station coverage gap
273°, poorly surrounded by stations
Stations used
5

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 110 in the 60 days after this one and 80 in the 30 days before it.

After

The first 60 of 110.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1044492. Read Tue, Sep 22, 2026, 4:04 PM UTC.