California earthquakes

M1.7 earthquake 10 km ESE of Mammoth Lakes, California

A magnitude 1.7 earthquake struck 10 km ESE of Mammoth Lakes, California on Sun, Oct 31, 1982, 6:25 AM PST (14:25 UTC), 2 km (2 mi) below the surface.

A larger quake followed: M4.7 25 km NNE of Benton, California. This one was a foreshock.

Mammoth Lakes forecast More in California

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 1.7 (md), micro
Local time: Sun, Oct 31, 1982, 6:25 AM PST
UTC: 1982-10-31 14:25:00 UTC
Depth: 2.4 km (1.5 mi), shallow
Epicenter: 37.606° N, 118.864° W
Region: California
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 0.5 km horizontally, 0.8 km in depth
Magnitude uncertainty: ±0.21
Depth from: From location
Station coverage gap: 106°
Stations used: 9

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: at least 201 in the 60 days after this one and at least 200 in the 30 days before it.

After

The first 60 of at least 201.

Before

Earthquakes today California earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1081221. Read Mon, Sep 28, 2026, 6:44 PM UTC.