Simpson Bt Fire
199436,914 acresUtah
The Simpson Bt Fire burned 36,914 acres, about 58 square miles, across Tooele County. It began on June 15, 1994.
Watch how it happenedSimpson Bt Fire · 1994
How it happened
See how severely each place burned, revealed outward from where it started.
How severely it burned
Burn severity inside the final perimeter, classified from Landsat images taken before and after the fire.
| Severity | Share | Acres |
|---|---|---|
| Highmost vegetation consumed, soils altered | 1.3% | 485 |
| Moderatemixed: many trees killed, some survive | 36% | 13,230 |
| Lowsurface fire, most trees survive | 42% | 15,563 |
| Unburned to lowislands inside the perimeter, little change | 21% | 7,628 |
1% of the area inside the perimeter burned at high severity, about 485 acres; 37% burned at moderate or high severity.
Monitoring Trends in Burn Severity (U.S. Geological Survey and USDA Forest Service). Classes come from the change in a Landsat burn index (dNBR) between images before and after the fire; acres are each class’s share of the fire’s mapped area.
Where it burned
Acres inside each county, measured from the satellite-mapped perimeter.
| Tooele County | UT | 36,916 |
Other large fires in Utah in 1994
- Elevator Fire31,841 acres
Monitoring Trends in Burn Severity (USGS and U.S. Forest Service). Type recorded: Wildfire.