California earthquakes

M3.1 earthquake 9km SW of Alpaugh, CA

A magnitude 3.1 earthquake struck 9km SW of Alpaugh, CA on Mon, Sep 20, 1982, 10:33 AM PDT (17:33 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M3.5 14km NW of Oildale, CA. This one was a foreshock.

Alpaugh forecastMore in California

Map

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

Open the live map with earthquakes

The earthquake

Magnitude
3.1 (Mc), minor
Magnitude from
Southern California Seismic Network
Local time
UTC
1982-09-20 17:33:35 UTC
Depth
5.0 km (3.1 mi), shallow
Epicenter
35.827° N, 119.560° 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.

Depth from
Operator assigned
Station coverage gap
134°
Stations used
0

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 67 in the 60 days after this one and 6 in the 30 days before it.

After

The first 60 of 67.

Before

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci507942. Read Sat, Oct 3, 2026, 5:07 AM UTC.