Earthquake Information for St. Ignatius, Montana

St. Ignatius, MT has a high earthquake risk, with a total of 142 earthquakes since 1931. The USGS database shows that there is a 66.72% chance of a major earthquake within 50km of St. Ignatius, MT within the next 50 years. The largest earthquake within 30 miles of St. Ignatius, MT was a 4.4 Magnitude in 1975.

Risk Level:
High
Total Number of Earthquakes in St. Ignatius since 1931 within 30 miles
142
Probability of A 5.0 Earthquake within next 50 years
66.72%

Earthquake Probability for St. Ignatius, MT

View the probability of a major earthquake within the next 50 years in St. Ignatius, MT.

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
66.72%
5.1
60.19%
5.2
60.19%
5.2
53.79%
5.3
47.70%
5.4
42.02%
5.5
36.83%
5.6
32.16%
5.7
28.02%
5.8
24.38%
5.9
21.21%
6.0
18.48%
6.1
15.71%
6.2
13.34%
6.3
11.19%
6.4
9.26%
6.5
7.43%
6.6
5.64%
6.7
4.16%
6.8
2.94%
6.9
1.89%
7.0
0.94%
7.1
0.77%
7.2
0.57%
7.3
0.44%
7.4
0.21%
7.5
0.09%
7.6
0.03%
7.7
0.01%
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%