Sierra Grande School District R-30 Natural Disasters and Weather Extremes
The chance of earthquake damage in Sierra Grande School District R-30 is lower than Colorado average and is much lower than the national average. The risk of tornado damage in Sierra Grande School District R-30 is much lower than Colorado average and is much lower than the national average.
Earthquake Index, #121
| Sierra Grande School District R-30 | 0.07 |
| Colorado | 1.32 |
| 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, #34
| Sierra Grande School District R-30 | 0.0000 |
| Colorado | 0.0009 |
| 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, #120
| Sierra Grande School District R-30 | 21.27 |
| Colorado | 117.98 |
| 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 292 other weather extremes events within 50 miles of Sierra Grande School District R-30 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: | 0 |
| Dust Storm: | 0 | Flood: | 14 | Hail: | 244 | Heat: | 0 | Heavy Snow: | 0 |
| High Surf: | 0 | Hurricane: | 0 | Ice Storm: | 0 | Landslide: | 0 | Strong Wind: | 0 |
| Thunderstorm Winds: | 16 | Tropical Storm: | 0 | Wildfire: | 3 | Winter Storm: | 0 | Winter Weather: | 0 |
| Other: | 15 | ||||||||
Volcanos Nearby
No volcano is found in or near Sierra Grande School District R-30.
Historical Earthquake Events
No historical earthquake events that had recorded magnitudes of 3.5 or above found in or near Sierra Grande School District R-30.
No historical earthquake events found in or near Sierra Grande School District R-30.
Historical Tornado Events
A total of 4 historical tornado events that had recorded magnitude of 2 or above found in or near Sierra Grande School District R-30.
| Distance (miles) | Date | Magnitude | Start Lat/Log | End Lat/Log | Length | Width | Fatalities | Injuries | Property Damage | Crop Damage | Affected County |
| 3.1 | 1955-07-31 | 3 | 37°26'N / 105°26'W | 0.50 Mile | 100 Yards | 0 | 0 | 3K | 0 | Costilla | |
| 21.5 | 1955-07-10 | 2 | 37°27'N / 105°52'W | 0 | 0 | 3K | 0 | Alamosa | |||
| 40.2 | 1953-06-17 | 2 | 37°06'N / 106°06'W | 1.00 Mile | 1417 Yards | 0 | 0 | 0K | 0 | Conejos | |
| 43.3 | 1960-07-04 | 2 | 38°02'N / 105°28'W | 0 | 0 | 3K | 0 | Custer |
* 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.