California earthquakes

M4.9 earthquake 20 km NNE of Mesa, California

A magnitude 4.9 earthquake struck 20 km NNE of Mesa, California on Mon, Jul 21, 1986, 7:53 AM PDT (14:53 UTC), 6 km (4 mi) below the surface.

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

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The earthquake

Magnitude
4.9 (ml), light
Local time
UTC
1986-07-21 14:53:58 UTC
Depth
6.0 km (3.7 mi), shallow
Epicenter
37.580° N, 118.420° 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

Nearest places

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

Nearby

Within 100 km, magnitude 1.9 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 usp0002w9q (also filed as ushis3972). Read Tue, Sep 22, 2026, 10:30 PM UTC.