California earthquakes

M4.7 earthquake 16 km NE of Mesa, California

A magnitude 4.7 earthquake struck 16 km NE of Mesa, California on Wed, Jul 23, 1986, 8:39 AM PDT (15:39 UTC), 12 km (8 mi) below the surface.

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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: 4.7 (ml), light
Local time: Wed, Jul 23, 1986, 8:39 AM PDT
UTC: 1986-07-23 15:39:11 UTC
Depth: 12.1 km (7.5 mi), shallow
Epicenter: 37.537° N, 118.437° 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 0.3 km horizontally, 0.9 km in depth
Depth from: From location
Station coverage gap: 116°
Stations used: 22

Nearest places

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

Nearby

Within 100 km, magnitude 1.7 and up: 200 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 200.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc77040 (also filed as ushis3988, ci603226, usp0002we6). Read Tue, Sep 22, 2026, 7:03 AM UTC.