Unnamed Fire
199137,836 acresMinnesota
The Unnamed Fire burned 37,836 acres, about 59 square miles, across 3 counties. It began on May 13, 1991.
Watch how it happenedUnnamed Fire · 1991
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 |
|---|---|---|
| Lowsurface fire, most trees survive | 74% | 28,168 |
| Unburned to lowislands inside the perimeter, little change | 22% | 8,275 |
| Increased greennessvegetation greener after the fire than before | 3.7% | 1,393 |
Most of the area inside the perimeter burned at low severity or not at all.
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.
| Clearwater County | MN | 37,823 |
| Pennington County | MN | 11 |
| Polk County | MN | 5 |
Monitoring Trends in Burn Severity (USGS and U.S. Forest Service). Type recorded: Other.