California earthquakes

M3.4 earthquake 3 km ESE of Mammoth Lakes, California

A magnitude 3.4 earthquake struck 3 km ESE of Mammoth Lakes, California on Thu, Nov 12, 1981, 6:42 PM PST (02:42 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M3.9 4 km ESE of Mammoth Lakes, 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
3.4 (md), minor
Local time
UTC
1981-11-13 02:42:27 UTC
Depth
6.6 km (4.1 mi), shallow
Epicenter
37.635° N, 118.932° 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 0.6 km horizontally, 0.9 km in depth
Magnitude uncertainty
±0.14
Depth from
From location
Station coverage gap
209°, poorly surrounded by stations
Stations used
10

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 87 in the 60 days after this one and 30 in the 30 days before it.

After

The first 60 of 87.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1069423 (also filed as ci526952). Read Tue, Sep 22, 2026, 7:06 AM UTC.