vostok_hotspot

Consistent fire-activity history from MODIS and VIIRS hotspots, 2000 to today. Draw an area on the map or pick a preset.

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Date range
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Monthly history

Click a month or use the month selector to compare it with the all-year median.

Select an area

Draw an area on the map or pick a preset to see the monthly history.

Month vs median

Absolute monthly hotspots, with the median across years.

Draw an area to compare a month with its all-year median.

How it works

  1. 1
    Two sensors

    NASA FIRMS MODIS and VIIRS detect fires differently, so raw hotspot counts are not directly comparable.

  2. 2
    The 2012 jump

    VIIRS starts in 2012 and raw totals jump when it joins MODIS. The series needs harmonization.

  3. 3
    Ratio k

    We estimate k = VIIRS / MODIS by H3 region and season from the 2012–2016 overlap.

  4. 4
    MODIS × k before 2012

    Pre-2012 MODIS counts are scaled by k. The low–high band is a 90% Poisson uncertainty interval.

Cells with hotspots in 8+ different years are treated as persistent heat sources (industry, flares); recurring agricultural burns can be affected, so the filter can be turned off.

Hold-out validation, 2015–2018
Tajikistan−5.0%annual error · r = 0.718
United States−9.5%annual error · r = 0.992