»St. Clair County

Earthquake Information for St. Clair County, Illinois

St. Clair County, IL has a low earthquake risk, with a total of 5 earthquakes since 1931. The USGS database shows that there is a 4.50% chance of a major earthquake within 50km of St. Clair County, IL within the next 50 years. The largest earthquake within 30 miles of St. Clair County, IL was a 5.6 Magnitude in 1974.

Risk Level:
Low

Total Number of Earthquakes in St. Clair County since 1931

5

Probability of A 5.0 Earthquake within next 50 years

4.50%

Most Recent
Largest

10/11/2013 - 1.9 mag, 6.8mi depth 5 mi from Columbia, IL
5/21/2010 - 2.3 mag, 20.8mi depth 1 mi from Lebanon, IL
11/23/2005 - 2.5 mag, 11.7mi depth 1 mi from Fairmont City, IL
9/13/1997 - 2.8 mag, 16.0mi depth 2 mi from Darmstadt, IL
8/31/1987 - 3.1 mag, 5.0mi depth 2 mi from Darmstadt, IL
8/26/1986 - 3.7 mag, 5.0mi depth 2 mi from Fayetteville Township, IL
8/22/1974 - 2.5 mag, 12.0mi depth 2 mi from Marissa, IL
6/5/1974 - 4.0 mag, 11.0mi depth 2 mi from Caseyville Township, IL
3/27/1974 - 5.6 mag, 10.0mi depth 1 mi from Centreville, IL
4/18/1973 - 2.5 mag, 15.0mi depth 1 mi from Columbia, IL

3/27/1974 - 5.6 mag, 10.0mi depth 1 mi from Centreville, IL
6/5/1974 - 4.0 mag, 11.0mi depth 2 mi from Caseyville Township, IL
8/26/1986 - 3.7 mag, 5.0mi depth 2 mi from Fayetteville Township, IL
8/31/1987 - 3.1 mag, 5.0mi depth 2 mi from Darmstadt, IL
9/13/1997 - 2.8 mag, 16.0mi depth 2 mi from Darmstadt, IL
11/23/2005 - 2.5 mag, 11.7mi depth 1 mi from Fairmont City, IL
4/18/1973 - 2.5 mag, 15.0mi depth 1 mi from Columbia, IL
8/22/1974 - 2.5 mag, 12.0mi depth 2 mi from Marissa, IL
5/21/2010 - 2.3 mag, 20.8mi depth 1 mi from Lebanon, IL
10/11/2013 - 1.9 mag, 6.8mi depth 5 mi from Columbia, IL

View All

Earthquake Probability for St. Clair County, IL

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

Probability of Earthquakes Within the Next 50 Years For Magnitudes Between 5.0 and 9.2

(within 31 km/51 miles above magnitude)

5.0

4.50%

5.1

3.63%

5.2

3.63%

5.2

3.63%

5.3

2.92%

5.4

2.34%

5.5

1.88%

5.6

1.73%

5.7

1.38%

5.8

1.20%

5.9

0.96%

6.0

0.88%

6.1

0.67%

6.2

0.56%

6.3

0.41%

6.4

0.36%

6.5

0.24%

6.6

0.18%

6.7

0.15%

6.8

0.07%

6.9

0.04%

7.0

0.02%

7.1

0.01%

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%

Earthquake Count for St. Clair County, IL

View the number of earthquake incidents in St. Clair County, IL by year that are more than 2.5 Magnitude.

List of Earthquake Incidents for St. Clair County, IL

Total Number of Earthquakes in St. Clair County, IL within 30 miles. All distances and depths in the table are measured in miles.

Date

Magnitude

Depth

10/11/2013

1.9

6.8

Details

05/21/2010

2.3

20.8

Details

11/23/2005

2.5

11.7

Details

09/13/1997

2.8

16.0

Details

08/31/1987

3.1

5.0

Details

08/26/1986

3.7

5.0

Details

08/22/1974

2.5

12.0

Details

06/05/1974

4.0

11.0

Details

03/27/1974

5.6

10.0

Details

04/18/1973

2.5

15.0

Details

Risk Of Natural Disasters In St. Clair County, IL

Radon Risk Moderate
Tornado Risk Very High
UV Index Risk Moderate

Earthquake Information for St. Clair County, Illinois

Earthquake Probability for St. Clair County, IL

Probability of Earthquakes Within the Next 50 Years For Magnitudes Between 5.0 and 9.2

Earthquake Count for St. Clair County, IL

List of Earthquake Incidents for St. Clair County, IL

Risk Of Natural Disasters In St. Clair County, IL

Related Pages

Illinois Earthquakes by City