Milepost 78 Fire

2002107,366 acresAlaska

The Milepost 78 Fire burned 107,366 acres, about 168 square miles, across Yukon-Koyukuk Census Area. It began on May 23, 2002.

Watch how it happened

Milepost 78 Fire · 2002

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

Detections437satellite fire pixels

Fire milestones

Burn severityHigh, Moderate, Low, Unburned to low, Increased greenness

Burning nowAreas reached in the last half day of satellite passes

Washington, D.C., to scale61 square miles of land, drawn at the fire’s scale

Timing: NASA FIRMS satellite fire detections (437 MODIS) inside the final perimeter; each place takes the time of its nearest detection, so the order is satellite-observed but interpolated between passes, roughly every 12 hours. Severity: Monitoring Trends in Burn Severity (USGS, U.S. Forest Service), mapped from Landsat after the fire.

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 Milepost 78 Fire

Burn severity by class
Severity	Share	Acres
Highmost vegetation consumed, soils altered	14%	14,539
Moderatemixed: many trees killed, some survive	23%	24,625
Lowsurface fire, most trees survive	32%	34,111
Unburned to lowislands inside the perimeter, little change	21%	22,530
Increased greennessvegetation greener after the fire than before	0.9%	920
Not mappedcloud, shadow or water in the satellite images	9.9%	10,642

14% of the area inside the perimeter burned at high severity, about 14,539 acres; 36% 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

Yukon-Koyukuk Census Area	AK	107,420

Other large fires in Alaska in 2002

Geskakmina Lake Fire260,185 acres
Reindeer Fire225,602 acres
Vinasale Fire175,425 acres
Yetna River Fire156,079 acres
Sischu Fire127,466 acres
Moose Lake Fire118,836 acres
Colorado Creek Fire89,032 acres
Long Creek Fire73,238 acres

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