St. Louis County, MO Earthquake Report

Maps of Earthquakes in St. Louis County, MO

Earthquake List

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St. Louis County, MO Earthquake Probability

Very Low Risk Area

The USGS database shows that there is a 2.80% chance of a major earthquake within 50km of St. Louis County, MO within the next 50 years. The largest earthquake within 30 miles of St. Louis County, MO was a 5.6 Magnitude in 1974.

Probability of earthquakes within the next 50 years

Within 31 Miles / 50km above magnitude

Magnitude
Probability
5.0
2.80%
5.1
2.25%
5.2
2.25%
5.3
1.81%
5.4
1.45%
5.5
1.16%
5.6
1.07%
5.7
0.85%
5.8
0.74%
5.9
0.59%
6.0
0.54%
6.1
0.41%
6.2
0.34%
6.3
0.25%
6.4
0.22 %
6.5
0.15%
6.6
0.11%
6.7
0.09%
6.8
0.04%
6.9
0.02%
7.0
0.01%
7.1
0.00%
7.2
0.00%
7.3
0.00%
7.4
0.00%
7.5
0.00%
7.6
0.00%
7.7
0.00%
7.8
0.00%
7.9
0.00%
8.0
0.00%
8.1
0.00%
8.2
0.00%
8.3
0.00%
8.4
0.00%
8.5
0.00%
8.6
0.00%
8.7
0.00%
8.8
0.00%
8.9
0.00%
9.0
0.00%
9.1
0.00%
9.2
0.00%

St. Louis County, MO Historical Earthquakes (within 30 miles)

All distances and depths in the table below are measured in miles.

Area Earthquakes By Year (>2.5 Mag)

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Environment Report Summary

Moderate Risk
Moderate Risk Area
Moderate Potential Risk