Earthquake Information for East Helena, Montana

East Helena, MT has a high earthquake risk, with a total of 204 earthquakes since 1931. The USGS database shows that there is a 53.92% chance of a major earthquake within 50km of East Helena, MT within the next 50 years. The largest earthquake within 30 miles of East Helena, MT was a 4.1 Magnitude in 2000.

Risk Level:
High

Total Number of Earthquakes in East Helena since 1931 within 30 miles

204

Probability of A 5.0 Earthquake within next 50 years

53.92%

Most Recent
Largest

4/19/2024 - 0.6 mag, 9.8mi depth 16.6424 mi from Winston, MT
2/14/2024 - 2.0 mag, -2.0mi depth 4.66524 mi from Townsend, MT
1/26/2024 - 0.4 mag, 10.4mi depth 3.86656 mi from Marysville, MT
10/10/2023 - 0.9 mag, -2.0mi depth 0.9172 mi from South Hills, MT
5/26/2022 - 0.2 mag, 8.4mi depth 2.98304 mi from Marysville, MT
2/10/2022 - 1.1 mag, -2.0mi depth 4.63013 mi from Townsend, MT
12/2/2021 - 1.9 mag, -2.0mi depth 5.42849 mi from Townsend, MT
10/26/2021 - 1.9 mag, -2.0mi depth 5.2829 mi from Townsend, MT
10/12/2021 - 1.8 mag, -2.0mi depth 5.36269 mi from Townsend, MT
10/6/2021 - 1.2 mag, 6.0mi depth 3.50547 mi from Elkhorn, MT
8/28/2021 - 2.9 mag, 5.4mi depth 6.59797 mi from Winston, MT
8/12/2021 - 1.7 mag, -2.0mi depth 4.83454 mi from Townsend, MT
8/3/2021 - 1.1 mag, -2.0mi depth 3.75908 mi from Townsend, MT
6/22/2021 - 1.6 mag, -2.0mi depth 5.53359 mi from Townsend, MT
6/10/2021 - 1.4 mag, -2.0mi depth 4.26698 mi from Townsend, MT
6/3/2021 - 1.5 mag, -2.0mi depth 4.34361 mi from The Silos, MT
5/24/2021 - 2.6 mag, 1.7mi depth 3.61691 mi from Avon, MT
4/20/2021 - 0.9 mag, -2.0mi depth 4.52206 mi from The Silos, MT
4/19/2021 - 1.3 mag, -2.0mi depth 5.89452 mi from Townsend, MT
3/24/2021 - 3.1 mag, 4.8mi depth 9.41534 mi from Marysville, MT
2/18/2021 - 2.1 mag, 5.9mi depth 1.10726 mi from Townsend, MT
7/22/2020 - 1.6 mag, -2.0mi depth 4.38656 mi from Townsend, MT
6/4/2020 - 0.6 mag, -2.0mi depth 2.15083 mi from Townsend, MT
4/19/2020 - 2.6 mag, 10.0mi depth 2.95033 mi from Boulder, MT
4/17/2020 - 2.8 mag, 10.0mi depth 3.682 mi from Boulder, MT
2/28/2020 - 1.9 mag, 4.4mi depth 24.9765 mi from Helena Valley Southeast, MT
1/30/2020 - 3.3 mag, 5.0mi depth 7.29342 mi from Helena Valley Northwest, MT
12/17/2019 - 1.6 mag, -3.0mi depth 15.1687 mi from Helena Valley Northwest, MT
7/30/2019 - 1.4 mag, -2.0mi depth 3.21112 mi from Montana City, MT
6/18/2019 - 1.7 mag, -2.0mi depth 2.80948 mi from Montana City, MT
5/8/2019 - 1.2 mag, 4.7mi depth 16.6278 mi from Helena Valley Northeast, MT
5/8/2019 - -0.6 mag, 9.1mi depth 10.6966 mi from Helena West Side, MT
5/4/2019 - 1.4 mag, 9.8mi depth 4.45729 mi from Helena Valley Northwest, MT
5/1/2019 - 1.6 mag, -2.0mi depth 4.80295 mi from Townsend, MT
2/4/2019 - 2.0 mag, 12.4mi depth 12.8076 mi from Helena West Side, MT
10/11/2018 - 1.8 mag, -2.0mi depth 4.63809 mi from Townsend, MT
9/20/2018 - 1.3 mag, -2.0mi depth 4.39916 mi from Townsend, MT
7/3/2018 - 1.6 mag, -2.0mi depth 4.70855 mi from Townsend, MT
4/4/2018 - 1.1 mag, -2.0mi depth 3.99378 mi from Townsend, MT
2/7/2018 - 1.3 mag, -2.0mi depth 4.41979 mi from Townsend, MT
9/6/2017 - 1.6 mag, -2.0mi depth 4.2136 mi from Townsend, MT
8/22/2017 - 1.0 mag, 7.7mi depth 13.6806 mi from Helena Valley Northwest, MT
8/22/2017 - 1.0 mag, 8.3mi depth 13.8739 mi from Helena Valley Northwest, MT
3/15/2017 - 0.3 mag, 15.7mi depth 15.0958 mi from Deer Lodge, MT
3/14/2017 - 1.3 mag, 5.0mi depth 12.1124 mi from Helena Valley Northwest, MT
3/12/2017 - 3.8 mag, 19.6mi depth 14.7881 mi from Deer Lodge, MT
1/26/2017 - 1.8 mag, 1.4mi depth 14.211 mi from Helena Valley Northwest, MT
9/17/2016 - 1.3 mag, 5.0mi depth 4.53773 mi from Helena Valley Northwest, MT
8/30/2016 - 1.1 mag, -2.0mi depth 4.49392 mi from Townsend, MT
8/12/2016 - 1.4 mag, 7.0mi depth 6.30346 mi from Helena Valley Northwest, MT

4/8/2000 - 4.1 mag, 4.7mi depth 5.4757 mi from Townsend, MT
11/10/2000 - 4.0 mag, 2.1mi depth 9.0344 mi from Townsend, MT
7/18/1975 - 3.9 mag, 5.0mi depth 3.0031 mi from Helena Valley Northwest, MT
2/13/1976 - 3.8 mag, 1.0mi depth 3.6178 mi from Helena Valley Northwest, MT
3/12/2017 - 3.8 mag, 19.6mi depth 14.7881 mi from Deer Lodge, MT
5/24/2000 - 3.7 mag, 2.5mi depth 5.9525 mi from Townsend, MT
1/16/2011 - 3.7 mag, 15.2mi depth 6.4254 mi from Marysville, MT
5/3/1975 - 3.7 mag, 5.0mi depth 3.936 mi from Townsend, MT
7/16/1986 - 3.6 mag, 5.0mi depth 4.8037 mi from Jefferson City, MT
7/16/1986 - 3.6 mag, 5.0mi depth 4.9677 mi from Jefferson City, MT
7/19/1975 - 3.5 mag, 5.0mi depth 3.049 mi from Helena Valley West Central, MT
1/17/2004 - 3.5 mag, 11.3mi depth 2.8393 mi from Radersburg, MT
10/24/1986 - 3.5 mag, 3.4mi depth 4.6775 mi from Elkhorn, MT
10/18/1986 - 3.5 mag, 5.0mi depth 3.5808 mi from Elkhorn, MT
10/3/2015 - 3.4 mag, 4.3mi depth 5.03827 mi from Helena Valley Northwest, MT
11/26/1982 - 3.4 mag, 5.0mi depth 2.1488 mi from Elkhorn, MT
2/3/2016 - 3.4 mag, 2.0mi depth 4.5893 mi from Clancy, MT
6/6/2000 - 3.3 mag, 1.6mi depth 4.414 mi from Townsend, MT
11/9/1986 - 3.3 mag, 5.0mi depth 1.7875 mi from Boulder, MT
4/1/2000 - 3.3 mag, 6.7mi depth 5.7042 mi from Townsend, MT
10/19/1986 - 3.3 mag, 5.0mi depth 3.3258 mi from Elkhorn, MT
1/30/2020 - 3.3 mag, 5.0mi depth 7.29342 mi from Helena Valley Northwest, MT
9/4/1977 - 3.2 mag, 5.0mi depth 1.4664 mi from Helena West Side, MT
4/10/2000 - 3.2 mag, 3.5mi depth 4.9159 mi from Townsend, MT
4/9/2000 - 3.2 mag, 3.7mi depth 6.0938 mi from Townsend, MT
10/31/1995 - 3.2 mag, 10.6mi depth 8.4466 mi from Marysville, MT
1/17/2004 - 3.2 mag, 11.0mi depth 2.8393 mi from Radersburg, MT
6/16/1999 - 3.2 mag, 3.9mi depth 9.9691 mi from Craig, MT
10/18/1986 - 3.2 mag, 5.0mi depth 4.9091 mi from Elkhorn, MT
6/8/2000 - 3.1 mag, 2.1mi depth 7.0867 mi from Townsend, MT
12/6/2015 - 3.1 mag, 3.0mi depth 5.44792 mi from Clancy, MT
7/18/1975 - 3.1 mag, 5.0mi depth 3.8013 mi from Helena Valley West Central, MT
3/24/2021 - 3.1 mag, 4.8mi depth 9.41534 mi from Marysville, MT
7/6/2008 - 3.1 mag, 12.1mi depth 3.7904 mi from Elkhorn, MT
2/3/1993 - 3.1 mag, 23.0mi depth 8.8961 mi from Marysville, MT
12/3/1986 - 3.1 mag, 0.0mi depth 9.1676 mi from Jefferson City, MT
5/23/2000 - 3.0 mag, 5.9mi depth 5.2921 mi from Townsend, MT
6/18/2015 - 3.0 mag, 10.6mi depth 7.86535 mi from Helena Valley Northwest, MT
6/20/2016 - 3.0 mag, -2.8mi depth 8.0911 mi from Helena West Side, MT
4/18/2009 - 3.0 mag, 21.8mi depth 7.3497 mi from Marysville, MT
8/28/2021 - 2.9 mag, 5.4mi depth 6.59797 mi from Winston, MT
3/22/2003 - 2.9 mag, 10.3mi depth 3.0942 mi from Helena Valley West Central, MT
10/7/2003 - 2.9 mag, 10.2mi depth 9.0945 mi from Radersburg, MT
12/26/1998 - 2.9 mag, 5.8mi depth 5.2446 mi from Jefferson City, MT
9/13/2012 - 2.9 mag, 9.1mi depth 8.3198 mi from Helena Valley Northeast, MT
12/19/1994 - 2.9 mag, 6.3mi depth 1.8688 mi from Marysville, MT
4/11/2010 - 2.8 mag, 17.8mi depth 19.6745 mi from Helena Valley Northeast, MT
12/2/2010 - 2.8 mag, 14.3mi depth 6.4993 mi from Marysville, MT
6/4/2003 - 2.8 mag, 16.2mi depth 6.0518 mi from Marysville, MT
4/8/2000 - 2.8 mag, 4.2mi depth 5.6619 mi from Townsend, MT

View All

Earthquake Probability for East Helena, MT

View the probability of a major earthquake within the next 50 years in East Helena, MT.

Probability of Earthquakes Within the Next 50 Years For Magnitudes Between 5.0 and 9.2

(within 31 km/51 miles above magnitude)

5.0

53.92%

5.1

47.64%

5.2

47.64%

5.2

41.78%

5.3

36.40%

5.4

31.55%

5.5

27.23%

5.6

23.44%

5.7

20.13%

5.8

17.27%

5.9

14.81%

6.0

12.72%

6.1

10.64%

6.2

8.87%

6.3

7.33%

6.4

6.01%

6.5

4.84%

6.6

3.62%

6.7

2.59%

6.8

1.63%

6.9

0.77%

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%

Earthquake Count for East Helena, MT

View the number of earthquake incidents in East Helena, MT by year that are more than 2.5 Magnitude.

List of Earthquake Incidents for East Helena, MT

Total Number of Earthquakes in East Helena, MT within 30 miles. All distances and depths in the table are measured in miles.

04/19/2024

0.6

9.8

16.64

Earthquake Information for East Helena, Montana

Earthquake Probability for East Helena, MT

Probability of Earthquakes Within the Next 50 Years For Magnitudes Between 5.0 and 9.2

Earthquake Count for East Helena, MT

List of Earthquake Incidents for East Helena, MT

Risk Of Natural Disasters In East Helena, MT

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