Earthquake Information for Helena Valley West Central, Montana

Helena Valley West Central, MT has a high earthquake risk, with a total of 414 earthquakes since 1931. The USGS database shows that there is a 47.00% chance of a major earthquake within 50km of Helena Valley West Central, MT within the next 50 years. The largest earthquake within 30 miles of Helena Valley West Central, MT was a 5.8 Magnitude in 2017.

Risk Level:
High
Total Number of Earthquakes in Helena Valley West Central since 1931 within 30 miles
414
Probability of A 5.0 Earthquake within next 50 years
47.00%

Earthquake Probability for Helena Valley West Central, MT

View the probability of a major earthquake within the next 50 years in Helena Valley West Central, 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
47.00%
5.1
41.23%
5.2
41.23%
5.2
35.97%
5.3
31.22%
5.4
27.01%
5.5
23.31%
5.6
20.09%
5.7
17.31%
5.8
14.92%
5.9
12.88%
6.0
11.15%
6.1
9.31%
6.2
7.76%
6.3
6.40%
6.4
5.25%
6.5
4.25%
6.6
3.20%
6.7
2.31%
6.8
1.46%
6.9
0.70%
7.0
0.11%
7.1
0.04%
7.2
0.01%
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%