Mexico earthquakes

M3.7 earthquake 13 km NNW of La Unión, Mexico

A magnitude 3.7 earthquake struck 13 km NNW of La Unión, Mexico on Fri, Jul 26, 1985, 4:08 AM CST (10:08 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M8.0 1985 Michoacan, Mexico Earthquake. This one was a foreshock.

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The earthquake

Magnitude
3.7 (mb), minor
Local time
UTC
1985-07-26 10:08:25 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
18.099° N, 101.841° W
Region
Mexico
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
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Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 24 in the 60 days after this one and 0 in the 30 days before it.

After

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002h3n. Read Wed, Sep 30, 2026, 12:31 AM UTC.