Edgemont School District 23-1 Natural Disasters and Weather Extremes
The chance of earthquake damage in Edgemont School District 23-1 is about the same as South Dakota average and is much lower than the national average. The risk of tornado damage in Edgemont School District 23-1 is lower than South Dakota average and is much lower than the national average.
Earthquake Index, #14
| Edgemont School District 23-1 | 0.10 |
| South Dakota | 0.05 |
| 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, #1
| Edgemont School District 23-1 | 0.0000 |
| South Dakota | 0.0000 |
| 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, #142
| Edgemont School District 23-1 | 46.66 |
| South Dakota | 114.73 |
| 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 1,172 other weather extremes events within 50 miles of Edgemont School District 23-1 were recorded from 1950 to 2010. The following is a break down of these events:
| Type | Count | Type | Count | Type | Count | Type | Count | Type | Count |
| Avalanche: | 0 | Blizzard: | 0 | Cold: | 0 | Dense Fog: | 0 | Drought: | 1 |
| Dust Storm: | 0 | Flood: | 36 | Hail: | 865 | Heat: | 0 | Heavy Snow: | 0 |
| High Surf: | 0 | Hurricane: | 0 | Ice Storm: | 0 | Landslide: | 0 | Strong Wind: | 2 |
| Thunderstorm Winds: | 248 | Tropical Storm: | 0 | Wildfire: | 5 | Winter Storm: | 0 | Winter Weather: | 0 |
| Other: | 15 | ||||||||
Volcanos Nearby
No volcano is found in or near Edgemont School District 23-1.
Historical Earthquake Events
No historical earthquake events that had recorded magnitudes of 3.5 or above found in or near Edgemont School District 23-1.
No historical earthquake events found in or near Edgemont School District 23-1.
Historical Tornado Events
A total of 14 historical tornado events that had recorded magnitude of 2 or above found in or near Edgemont School District 23-1.
| Distance (miles) | Date | Magnitude | Start Lat/Log | End Lat/Log | Length | Width | Fatalities | Injuries | Property Damage | Crop Damage | Affected County |
| 8.8 | 1982-06-05 | 2 | 43°09'N / 103°57'W | 43°12'N / 103°48'W | 7.00 Miles | 33 Yards | 0 | 1 | 250K | 0 | Fall River |
| 18.7 | 1961-06-22 | 2 | 43°31'N / 103°37'W | 0 | 0 | 3K | 0 | Custer | |||
| 23.5 | 1969-07-14 | 2 | 43°22'N / 103°23'W | 0.10 Mile | 33 Yards | 0 | 0 | 25K | 0 | Fall River | |
| 32.3 | 1983-06-19 | 2 | 43°10'N / 103°13'W | 43°00'N / 103°20'W | 12.00 Miles | 40 Yards | 0 | 0 | 25K | 0 | Fall River |
| 35.1 | 1976-07-28 | 2 | 42°50'N / 103°34'W | 0.30 Mile | 30 Yards | 0 | 0 | 3K | 0 | Sioux | |
| 38.6 | 1983-06-19 | 2 | 43°00'N / 103°20'W | 42°48'N / 103°17'W | 10.00 Miles | 40 Yards | 0 | 0 | 250K | 0 | Dawes |
| 38.8 | 1965-06-11 | 2 | 43°49'N / 103°32'W | 0 | 0 | 3K | 0 | Custer | |||
| 39.6 | 1983-08-17 | 2 | 43°12'N / 103°04'W | 0.20 Mile | 10 Yards | 0 | 0 | 25K | 0 | Fall River | |
| 41.4 | 1966-06-22 | 2 | 43°41'N / 103°14'W | 43°42'N / 103°12'W | 0 | 0 | 25K | 0 | Custer | ||
| 44.8 | 1984-06-13 | 2 | 43°00'N / 104°40'W | 43°02'N / 104°37'W | 4.00 Miles | 30 Yards | 0 | 1 | 250K | 0 | Niobrara |
| 45.0 | 1982-06-05 | 2 | 43°03'N / 104°40'W | 1.00 Mile | 17 Yards | 0 | 3 | 250K | 0 | Niobrara | |
| 45.4 | 1978-07-28 | 2 | 43°02'N / 104°40'W | 5.00 Miles | 700 Yards | 0 | 0 | 250K | 0 | Niobrara | |
| 47.1 | 1958-06-12 | 2 | 43°53'N / 104°20'W | 1.00 Mile | 200 Yards | 0 | 0 | 25K | 0 | Weston | |
| 49.4 | 1966-07-23 | 2 | 43°58'N / 103°28'W | 43°56'N / 103°23'W | 3.80 Miles | 440 Yards | 0 | 5 | 25K | 0 | Pennington |
* 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.