California earthquakes

M3.4 earthquake 129 km W of Ferndale, California

A magnitude 3.4 earthquake struck 129 km W of Ferndale, California on Tue, May 15, 1979, 12:13 AM PDT (07:13 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M3.9 85 km WNW of Samoa, California. This one was a foreshock.

Ferndale forecastMore in California

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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
3.4 (ML, local (Richter)), minor
Magnitude from
Northern California Seismic System
Local time
UTC
1979-05-15 07:13:37 UTC
Depth
5.0 km (3.1 mi), shallow
Epicenter
40.588° N, 125.796° 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 11.2 km horizontally, 12.0 km in depth
Depth from
From location
Station coverage gap
331°, poorly surrounded by stations
Stations used
13

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 30 in the 60 days after this one and 22 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1045809. Read Thu, Oct 1, 2026, 9:58 PM UTC.