Earthquake Information for Massac County, Illinois

Massac County, IL has a moderate earthquake risk, with a total of 2 earthquakes since 1931. The USGS database shows that there is a 17.51% chance of a major earthquake within 50km of Massac County, IL within the next 50 years. The largest earthquake within 30 miles of Massac County, IL was a 4.2 Magnitude in 1994.

Risk Level:
Moderate
Total Number of Earthquakes in Massac County since 1931
2
Probability of A 5.0 Earthquake within next 50 years
17.51%

Earthquake Probability for Massac County, IL

View the probability of a major earthquake within the next 50 years in Massac 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)
MAGNITUDE
PROBABILITY
5.0
17.51%
5.1
15.75%
5.2
15.75%
5.2
15.75%
5.3
14.31%
5.4
13.13%
5.5
12.18%
5.6
11.88%
5.7
11.16%
5.8
10.78%
5.9
10.27%
6.0
10.11%
6.1
9.68%
6.2
9.45%
6.3
9.13%
6.4
9.03%
6.5
8.79%
6.6
8.66%
6.7
8.59%
6.8
8.41%
6.9
8.32%
7.0
8.27%
7.1
7.63%
7.2
7.57%
7.3
7.54%
7.4
6.15%
7.5
3.45%
7.6
3.45%
7.7
1.24%
7.8
1.24%
7.9
0.67%
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%