California earthquakes

M2.1 earthquake 24 km NE of Greenfield, California

A magnitude 2.1 earthquake struck 24 km NE of Greenfield, California on Fri, Mar 26, 1982, 2:08 AM PST (10:08 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M2.7 5 km N of Morgan Hill, 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
2.1 (md), micro
Local time
UTC
1982-03-26 10:08:43 UTC
Depth
5.1 km (3.2 mi), shallow
Epicenter
36.471° N, 121.043° 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, 0.5 km in depth
Magnitude uncertainty
±0.17
Depth from
From location
Station coverage gap
93°
Stations used
45

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 139 in the 60 days after this one and 53 in the 30 days before it.

After

The first 60 of 139.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1073249. Read Tue, Sep 22, 2026, 3:36 PM UTC.