 EPOD - a service of USRA

The Earth Science Picture of the Day (EPOD) highlights the diverse processes
and phenomena which shape our planet and our lives. EPOD will collect and
archive photos, imagery, graphics, and artwork with short explanatory
captions and links exemplifying features within the Earth system. The
community is invited to contribute digital imagery, short captions and
relevant links.


 Wildfire Smoke Plume Over Eastern Idaho

   September 09, 2021

    Wildfire_near_St_Anthony

   Photographer:  Glenn McCreery

   Summary Author:  Glenn McCreery

   On June 21, 2021 at approximately 5 PM Mountain Daylight Time (MDT) a
    wildfire, the “ Black Knoll Fire”, started in an unpopulated
   area approximately four miles northeast on the town of  St. Anthony,
   Idaho. The material burned was mostly grass,  sagebrush, and
    juniper. Organic matter burns at a lower temperature and produces a
   lighter gray plume than the black, higher temperature, plume from
   burning oil or a house fire. Such scenes are becoming more common now
   that wildfire season has become longer and the fires more intense due
   to  climate change.
   I photographed the fire at 7:43 PM MDT from Idaho State Highway 33, at
   a distance of approximately 10 miles to the southeast of the fire. By
   this time, the fire had grown to about 100 acres (40 hectares). The
   fire continued to grow to  approximately 433 acres (175 hectares)
   before it was completely contained the next day.  I calculate from the
   camera image dimensions and focal length (105mm) and approximate
   distance to the fire, that the plume reached a maximum height above the
   ground of approximately 1 mile (1.6 km). The angle that the initial
   plume makes compared with vertical is accounted for by an estimated 7
   to 10 mile per hour (11 to 16 kph) wind blowing from the southwest,
   although there are no nearby weather stations from which to check my
   estimate.

   Photo data: Canon 5D IV camera with Canon 24-105mm L lens at 105mm. ISO
   200, f:8.0, 1/1000s. Minor adjustments in Photoshop CC.
     * Newdale, Idaho Coordinates: 43.8849, -111.5389

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Geography Links

     *  Atlapedia Online
     *  CountryReports
     *  GPS Visualizer
     *  Holt Rinehart Winston World Atlas
     *  Mapping Our World
     *  Perry-Castañeda Library Map Collection
     *  Types of Land
     *  World Mapper

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   Earth Science Picture of the Day is a service of the  Universities
   Space Research Association.

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