California earthquakes

M3.3 earthquake 21 km SW of Ferndale, California

A magnitude 3.3 earthquake struck 21 km SW of Ferndale, California on Wed, Jul 28, 1982, 10:06 AM PDT (17:06 UTC), 17 km (11 mi) below the surface.

A larger quake followed: M3.5 46 km WSW of Ferndale, California. This one was a foreshock.

Ferndale forecastMore in California

Map

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

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The earthquake

Magnitude
3.3 (ml), minor
Local time
UTC
1982-07-28 17:06:32 UTC
Depth
17.1 km (10.6 mi), shallow
Epicenter
40.436° N, 124.430° 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, 0.5 km in depth
Depth from
From location
Station coverage gap
251°, poorly surrounded by stations
Stations used
16

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 125 in the 60 days after this one and 56 in the 30 days before it.

After

The first 60 of 125.

Before

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1076699. Read Tue, Sep 22, 2026, 10:28 PM UTC.