California earthquakes

M1.8 earthquake 2 km NNW of Round Valley, California

A magnitude 1.8 earthquake struck 2 km NNW of Round Valley, California on Wed, Jan 23, 1985, 7:42 PM PST (03:42 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M1.9 11km ESE of Independence, CA. 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
UTC
1985-01-24 03:42:30 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
37.440° N, 118.602° 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 0.2 km horizontally, 0.6 km in depth
Magnitude uncertainty
±0.24
Depth from
From location
Station coverage gap
63°
Stations used
35

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 nc38548. Read Tue, Sep 22, 2026, 8:29 AM UTC.