Earthquake Information for Flathead County, Montana

Flathead County, MT has a high earthquake risk, with a total of 39 earthquakes since 1931. The USGS database shows that there is a 70.91% chance of a major earthquake within 50km of Flathead County, MT within the next 50 years. The largest earthquake within 30 miles of Flathead County, MT was a 4.6 Magnitude in 1975.

Risk Level:
High
Total Number of Earthquakes in Flathead County since 1931
39
Probability of A 5.0 Earthquake within next 50 years
70.91%

Earthquake Probability for Flathead County, MT

View the probability of a major earthquake within the next 50 years in Flathead 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
70.91%
5.1
64.24%
5.2
64.24%
5.2
57.55%
5.3
51.03%
5.4
44.86%
5.5
39.14%
5.6
33.92%
5.7
29.25%
5.8
25.11%
5.9
21.49%
6.0
18.34%
6.1
15.34%
6.2
12.76%
6.3
10.53%
6.4
8.63%
6.5
6.99%
6.6
5.43%
6.7
4.06%
6.8
2.83%
6.9
1.78%
7.0
0.83%
7.1
0.72%
7.2
0.56%
7.3
0.42%
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%