California earthquakes

M2.2 earthquake 8 km SSW of Mad River, California

A magnitude 2.2 earthquake struck 8 km SSW of Mad River, California on Tue, Oct 26, 1982, 1:44 PM PDT (20:44 UTC), 30 km (19 mi) below the surface.

A larger quake followed: M4.4 near the coast of Northern 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
2.2 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1982-10-26 20:44:42 UTC
Depth
30.2 km (18.7 mi), shallow
Epicenter
40.379° N, 123.541° 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 0.7 km horizontally, 1.1 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
180°
Stations used
13

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 103 in the 60 days after this one and 44 in the 30 days before it.

After

The first 60 of 103.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1080952. Read Mon, Oct 5, 2026, 10:31 AM UTC.