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Helena Valley Northeast, MT Natural Disasters and Weather Extremes

 
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The chance of earthquake damage in Helena Valley Northeast is much higher than Montana average and is much higher than the national average. The risk of tornado damage in Helena Valley Northeast is about the same as Montana average and is much lower than the national average.

Topics:Earthquake IndexVolcano IndexTornado IndexOther Weather Extremes EventsVolcanos NearbyHistorical Earthquake EventsHistorical Tornado Events

Earthquake Index, #25

Helena Valley Northeast, MT
8.83
Montana
1.98
U.S.
1.81

The earthquake index value is calculated based on historical earthquake events data using USA.com algorithms. It is an indicator of the earthquake level in a region. A higher earthquake index value means a higher chance of an earthquake.

Volcano Index, #40

Helena Valley Northeast, MT
0.0000
Montana
0.0002
U.S.
0.0023

The volcano index value is calculated based on the currently known volcanoes using USA.com algorithms. It is an indicator of the possibility of a region being affected by a possible volcano eruption. A higher volcano index value means a higher chance of being affected.

Tornado Index, #268

Helena Valley Northeast, MT
3.64
Montana
7.73
U.S.
136.45

The tornado index value is calculated based on historical tornado events data using USA.com algorithms. It is an indicator of the tornado level in a region. A higher tornado index value means a higher chance of tornado events.

Other Weather Extremes Events

A total of 367 other weather extremes events within 50 miles of Helena Valley Northeast, MT were recorded from 1950 to 2010. The following is a break down of these events:

TypeCountTypeCountTypeCountTypeCountTypeCount
Avalanche:0Blizzard:3Cold:0Dense Fog:0Drought:1
Dust Storm:0Flood:6Hail:103Heat:0Heavy Snow:45
High Surf:0Hurricane:0Ice Storm:1Landslide:0Strong Wind:92
Thunderstorm Winds:61Tropical Storm:0Wildfire:3Winter Storm:47Winter Weather:1
Other:4 

Volcanos Nearby

No volcano is found in or near Helena Valley Northeast, MT.

Historical Earthquake Events

A total of 16 historical earthquake events that had recorded magnitudes of 3.5 or above found in or near Helena Valley Northeast, MT.

Distance (miles)DateMagnitudeDepth (km)LatitudeLongitude
6.21935-10-196.3N/A46.62-111.97
7.91935-10-196.3N/A46.6-112
6.21935-10-316N/A46.62-111.97
6.61935-10-316N/A46.62-112
35.01966-03-074.8N/A46.3-111.5
45.41977-03-114.8546.13-111.48
46.81972-11-024.5546.1-111.5
40.71970-10-184.31546.2-111.5
18.91964-08-134.1N/A46.5-112.2
43.41975-05-024N/A46.18-111.44
40.81969-05-013.9N/A46.7-112.8
9.51976-02-133.8146.75-112.13
42.91984-02-283.8546.18-111.46
41.71976-04-053.6546.13-111.68
40.71972-11-023.5546.2-111.5
43.41972-11-023.5546.2-111.4

Historical Tornado Events

A total of 1 historical tornado event that had recorded magnitude of 2 or above found in or near Helena Valley Northeast, MT.

Distance (miles)DateMagnitudeStart Lat/LogEnd Lat/LogLengthWidthFatalitiesInjuriesProperty DamageCrop DamageAffected County
38.41975-06-30247°03'N / 111°18'W000K0Cascade


* The information on this page is based on the global volcano database, the U.S. earthquake database of 1638-1985, and the U.S. Tornado and Weather Extremes database of 1950-2010.


 
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