California earthquakes

M2.4 earthquake 22km NNE of Trona, CA

A magnitude 2.4 earthquake struck 22km NNE of Trona, CA on Mon, May 11, 1981, 5:40 PM PDT (00:40 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M2.4 15km NNE of Inyokern, 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
2.4 (mc), micro
Local time
UTC
1981-05-12 00:40:56 UTC
Depth
4.7 km (2.9 mi), shallow
Epicenter
35.955° N, 117.309° 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 1.5 km horizontally, 31.6 km in depth
Depth from
Operator assigned
Station coverage gap
147°
Stations used
15

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 40 in the 60 days after this one and 61 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci515886. Read Tue, Sep 22, 2026, 10:26 PM UTC.