California earthquakes

M2.5 earthquake 5 km SSE of Swall Meadows, California

A magnitude 2.5 earthquake struck 5 km SSE of Swall Meadows, California on Wed, Jan 23, 1985, 12:40 PM PST (20:40 UTC), 7 km (5 mi) below the surface.

A larger quake followed: M2.6 2 km N 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: 2.5 (md), micro
Local time: Wed, Jan 23, 1985, 12:40 PM PST
UTC: 1985-01-23 20:40:12 UTC
Depth: 7.4 km (4.6 mi), shallow
Epicenter: 37.461° N, 118.620° 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, 0.6 km in depth
Magnitude uncertainty: ±0.22
Depth from: From location
Station coverage gap: 53°
Stations used: 38

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 nc38486 (also filed as ci59464). Read Tue, Sep 22, 2026, 9:24 AM UTC.