California earthquakes

M3.8 earthquake 11 km NNE of Mesa, California

A magnitude 3.8 earthquake struck 11 km NNE of Mesa, California on Tue, Aug 12, 1986, 8:37 AM PDT (15:37 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M4.4 1 km E of Bishop, California. This one was a foreshock.

Dixon Lane-Meadow Creek 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: 3.8 (ml), minor
Local time: Tue, Aug 12, 1986, 8:37 AM PDT
UTC: 1986-08-12 15:37:27 UTC
Depth: 3.2 km (2.0 mi), shallow
Epicenter: 37.507° N, 118.478° 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 0.2 km horizontally, 0.6 km in depth
Depth from: From location
Station coverage gap: 39°
Stations used: 46

Nearest places

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

Nearby

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

After

The first 60 of 201.

Before

Earthquakes today California earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc82832 (also filed as ci605389, usp0002x32). Read Wed, Sep 30, 2026, 2:05 AM UTC.