California earthquakes

M3.8 earthquake 9 km WNW of Fields Landing, California

A magnitude 3.8 earthquake struck 9 km WNW of Fields Landing, California on Wed, Feb 1, 1984, 12:49 PM PST (20:49 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M5.2 80 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: 3.8 (md), minor
Local time: Wed, Feb 1, 1984, 12:49 PM PST
UTC: 1984-02-01 20:49:04 UTC
Depth: 4.4 km (2.7 mi), shallow
Epicenter: 40.767° N, 124.314° W
Region: California
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 28.8 km horizontally, 82.0 km in depth
Magnitude uncertainty: ±0.21
Depth from: From location
Station coverage gap: 239°, poorly surrounded by stations
Stations used: 9

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 57 in the 60 days after this one and 43 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc4294. Read Tue, Sep 22, 2026, 9:12 AM UTC.