Earthquake Information for Missoula County, Montana

Missoula County, MT has a high earthquake risk, with a total of 63 earthquakes since 1931. The USGS database shows that there is a 55.05% chance of a major earthquake within 50km of Missoula County, MT within the next 50 years. The largest earthquake within 30 miles of Missoula County, MT was a 4.5 Magnitude in 1978.

Risk Level:
High
Total Number of Earthquakes in Missoula County since 1931
63
Probability of A 5.0 Earthquake within next 50 years
55.05%

Earthquake Probability for Missoula County, MT

View the probability of a major earthquake within the next 50 years in Missoula County, 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
55.05%
5.1
48.84%
5.2
48.84%
5.2
43.03%
5.3
37.69%
5.4
32.88%
5.5
28.59%
5.6
24.81%
5.7
21.52%
5.8
18.67%
5.9
16.23%
6.0
14.14%
6.1
12.00%
6.2
10.19%
6.3
8.53%
6.4
7.01%
6.5
5.56%
6.6
4.22%
6.7
3.16%
6.8
2.29%
6.9
1.53%
7.0
0.85%
7.1
0.73%
7.2
0.57%
7.3
0.43%
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%