Hanover Fire

201727,909 acresIdaho

The Hanover Fire burned 27,909 acres, about 44 square miles, across Idaho County. It began on August 1, 2017.

Watch how it happened

Hanover Fire · 2017

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

Detections3,033satellite fire pixels

Fire milestones

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

Burning nowAreas reached in the last half day of satellite passes

Manhattan, to scale23 square miles of land, drawn at the fire’s scale

Timing: NASA FIRMS satellite fire detections (2,496 VIIRS and 537 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 Hanover Fire

Burn severity by class
Severity	Share	Acres
Highmost vegetation consumed, soils altered	11%	3,160
Moderatemixed: many trees killed, some survive	18%	5,136
Lowsurface fire, most trees survive	40%	11,237
Unburned to lowislands inside the perimeter, little change	30%	8,306
Not mappedcloud, shadow or water in the satellite images	0.2%	67

11% of the area inside the perimeter burned at high severity, about 3,160 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

Idaho County	ID	27,927

Other large fires in Idaho in 2017

Highline Fire93,679 acres
Lolo Peak Fire62,337 acres
Powerline Fire54,349 acres
Mammoth Cave Fire50,410 acres
Powerline Fire45,405 acres
Loveridge Fire39,611 acres
Shoestring Fire35,544 acres
Antelope Fire29,651 acres

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