Earthquake Information for St. Louis County, Missouri

St. Louis County, MO has a very low earthquake risk, with a total of 2 earthquakes since 1931. 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.

Risk Level:
Very Low
Total Number of Earthquakes in St. Louis County, MO since 1931
2

Earthquake Probability for St. Louis County, MO

View the probability of a major earthquake within the next 50 years in St. Louis County, MO.

Probability of Earthquakes Within the Next 50 Years For Magnitudes Between 5.0 and 9.2
(within 31 km/51 miles above magnitude)

Probability of Earthquakes Within the Next 50 Years

(within 31 km/51 miles above magnitude)
MAGNITUDE
PROBABILITY
5.0
2.80%
5.1
2.25%
5.2
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%
Missouri Earthquake by City