California earthquakes

M2.4 earthquake 15 km W of Mad River, California

A magnitude 2.4 earthquake struck 15 km W of Mad River, California on Tue, Jan 12, 1982, 4:21 PM PST (00:21 UTC), 4 km (2 mi) below the surface.

A larger quake followed: M2.8 11 km E of Redcrest, 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
2.4 (md), micro
Local time
UTC
1982-01-13 00:21:42 UTC
Depth
3.7 km (2.3 mi), shallow
Epicenter
40.432° N, 123.696° 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 1.3 km horizontally, 13.7 km in depth
Magnitude uncertainty
±0.57
Depth from
From location
Station coverage gap
120°
Stations used
5

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 86 in the 60 days after this one and 63 in the 30 days before it.

After

The first 60 of 86.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1071192. Read Tue, Sep 22, 2026, 10:41 AM UTC.