California earthquakes

M3.5 earthquake 42km SW of Mendota, CA

A magnitude 3.5 earthquake struck 42km SW of Mendota, CA on Fri, Apr 20, 1979, 1:23 AM PST (09:23 UTC), 6 km (4 mi) below the surface.

Mendota 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
3.5 (ml), minor
Local time
UTC
1979-04-20 09:23:35 UTC
Depth
6.0 km (3.7 mi), shallow
Epicenter
36.520° N, 120.757° 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 3.5 km horizontally, 31.6 km in depth
Magnitude uncertainty
±0.20
Depth from
Operator assigned
Station coverage gap
286°, poorly surrounded by stations
Stations used
8

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 144 in the 60 days after this one and 55 in the 30 days before it.

After

The first 60 of 144.

Before

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci3348521. Read Wed, Sep 30, 2026, 11:05 PM UTC.