Earthquake Information for Cascade County, Montana

Cascade County, MT has a moderate earthquake risk, with a total of 2 earthquakes since 1931. The USGS database shows that there is a 9.01% chance of a major earthquake within 50km of Cascade County, MT within the next 50 years. The largest earthquake within 30 miles of Cascade County, MT was a 3.6 Magnitude in 2005.

Risk Level:
Moderate
Total Number of Earthquakes in Cascade County since 1931
2
Probability of A 5.0 Earthquake within next 50 years
9.01%

Earthquake Probability for Cascade County, MT

View the probability of a major earthquake within the next 50 years in Cascade 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
9.01%
5.1
7.57%
5.2
7.57%
5.2
6.43%
5.3
5.40%
5.4
4.53%
5.5
3.81%
5.6
3.22%
5.7
2.72%
5.8
2.30%
5.9
1.94%
6.0
1.66%
6.1
1.36%
6.2
1.12%
6.3
0.90%
6.4
0.72%
6.5
0.56%
6.6
0.43%
6.7
0.31%
6.8
0.19%
6.9
0.09%
7.0
0.00%
7.1
0.00%
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%