California earthquakes

M2.6 earthquake 10 km ENE of Ruth, California

A magnitude 2.6 earthquake struck 10 km ENE of Ruth, California on Tue, Mar 22, 1983, 5:28 PM PST (01:28 UTC), 36 km (22 mi) below the surface.

A larger quake followed: M3.1 29 km NNW of Junction City, 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
2.6 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1983-03-23 01:28:58 UTC
Depth
35.7 km (22.2 mi), shallow
Epicenter
40.318° N, 123.215° 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 0.4 km horizontally, 1.9 km in depth
Magnitude uncertainty
±0.29
Depth from
From location
Station coverage gap
61°
Stations used
31

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 62 in the 60 days after this one and 27 in the 30 days before it.

After

The first 60 of 62.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1089492. Read Sun, Oct 4, 2026, 10:22 AM UTC.