Illinois earthquakes

M3.3 earthquake 5 km W of Tamms, Illinois

A magnitude 3.3 earthquake struck 5 km W of Tamms, Illinois on Fri, Feb 15, 1985, 9:56 AM CST (15:56 UTC), 5 km (3 mi) below the surface.

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The earthquake

Magnitude
3.3 (md), minor
Local time
UTC
1985-02-15 15:56:10 UTC
Depth
5.3 km (3.3 mi), shallow
Epicenter
37.230° N, 89.330° W
Region
Illinois
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
From location

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 13 in the 60 days after this one and 3 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nm602507 (also filed as usp0002bxq). Read Wed, Sep 30, 2026, 2:51 AM UTC.