California earthquakes

M3.7 earthquake 7 km NNW of Mesa, California

A magnitude 3.7 earthquake struck 7 km NNW of Mesa, California on Sun, May 12, 1985, 8:28 AM PDT (15:28 UTC), 7 km (4 mi) below the surface.

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The earthquake

Magnitude: 3.7 (ml), minor
Local time: Sun, May 12, 1985, 8:28 AM PDT
UTC: 1985-05-12 15:28:45 UTC
Depth: 7.2 km (4.5 mi), shallow
Epicenter: 37.483° N, 118.558° 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, 0.7 km in depth
Depth from: From location
Station coverage gap: 44°
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: 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 nc47666 (also filed as ci66154, usp0002er2). Read Wed, Sep 23, 2026, 4:52 AM UTC.