Mexico earthquakes

M1.8 earthquake 19km NW of Progreso, B.C., MX

A magnitude 1.8 earthquake struck 19km NW of Progreso, B.C., MX on Mon, Mar 20, 1978, 12:12 PM PST (20:12 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M5.0 14km WNW of Alberto Oviedo Mota, B.C., MX. This one was a foreshock.

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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
1.8 (mh), micro
Local time
UTC
1978-03-20 20:12:02 UTC
Depth
7.0 km (4.3 mi), shallow
Epicenter
32.679° N, 115.750° 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.

Location uncertainty
About 1.5 km horizontally, 2.9 km in depth
Depth from
From location
Station coverage gap
180°
Stations used
7

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 193 in the 60 days after this one and 199 in the 30 days before it.

After

The first 60 of 193.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci3338232. Read Wed, Sep 30, 2026, 7:24 PM UTC.