Chile earthquakes

M4.5 earthquake 44 km W of Valparaíso, Chile

A magnitude 4.5 earthquake struck 44 km W of Valparaíso, Chile on Wed, Oct 31, 1973, 3:58 AM GMT-3 (06:58 UTC), 24 km (15 mi) below the surface.

A larger quake followed: M4.8 57 km NNW of Valparaíso, Chile. This one was a foreshock.

Valparaíso forecastMore in Chile

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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
4.5 (mb), light
Local time
UTC
1973-10-31 06:58:27 UTC
Depth
24.0 km (14.9 mi), shallow
Epicenter
33.077° S, 72.101° W
Region
Chile
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.

Stations used
15

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 31 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0000409. Read Mon, Sep 28, 2026, 6:33 PM UTC.