Monarch Fire

200725,043 acresUtah

The Monarch Fire burned 25,043 acres, about 39 square miles, across 2 counties. It began on July 18, 2007.

Watch how it happened

Monarch Fire · 2007

How it happened

Watch it burn in the order satellites saw it, coloured by how severely each place burned.

About this replay
Date (UTC)—Historical replay
Burned so far—acres
High severity—of the area so far
Detections63satellite fire pixels

How severely it burned

Burn severity inside the final perimeter, classified from Landsat images taken before and after the fire.

Map of burn severity across the Monarch Fire
Burn severity by class
SeverityShareAcres
Highmost vegetation consumed, soils altered2.8%711
Moderatemixed: many trees killed, some survive27%6,802
Lowsurface fire, most trees survive27%6,659
Unburned to lowislands inside the perimeter, little change43%10,871

3% of the area inside the perimeter burned at high severity, about 711 acres; 30% 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.

Acres burned by county
Tooele CountyUT23,749
Box Elder CountyUT1,296

Other large fires in Utah in 2007

Monitoring Trends in Burn Severity (USGS and U.S. Forest Service). Type recorded: Wildfire.