California earthquakes

M1.8 earthquake 11 km ENE of Swall Meadows, California

A magnitude 1.8 earthquake struck 11 km ENE of Swall Meadows, California on Fri, Dec 14, 1984, 4:04 PM PST (00:04 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M1.9 5 km NNW of Round Valley, 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: 1.8 (md), micro
Local time: Fri, Dec 14, 1984, 4:04 PM PST
UTC: 1984-12-15 00:04:57 UTC
Depth: 9.8 km (6.1 mi), shallow
Epicenter: 37.529° N, 118.513° 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 0.2 km horizontally, 0.4 km in depth
Magnitude uncertainty: ±0.20
Depth from: From location
Station coverage gap: 47°
Stations used: 34

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 nc34331. Read Tue, Sep 22, 2026, 10:28 AM UTC.