The fire started on 25 June 2021 in Gorny Ulus, Russia, and satellites saw it burning for 29 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 101,734 hectares from heat detections, spread across 2 municipalities.
This page is probably a fire complex, not a single fire. GWIS merges into one perimeter the fires that touch over weeks, which in large burning seasons can join dozens of separate fires. The total area is reliable; the origin and dates refer to the whole complex.
Other fire pages in the same area and on the same dates:
It is the 27th largest in Sakha Republic since 2016 (of 1347 with a page). Number 15 in Russia in 2021, of 581.
Union of 6 GWIS (Copernicus) perimeters: overlapping areas count once.
No official record is matched to this page to compare it with.
25 Jun 2021 to 23 Jul 2021: first and last day with fire on the page.
Satellites pass a few times a day and cloud or smoke can hide the fire: a lack of detections is not an official extinction. Each country’s emergency service declares a fire contained or out.
First day with fire seen by the satellites or the perimeter.
No official record is matched to this page, so the alert time and the cause are not known here.
VIIRS detections at 375 m. Most intense hotspot: 578 MW.
There is no official record to compare with. Each hotspot is a pixel detected in one satellite pass, not a separate fire.
Total radiative power on 8 July 2021; hotspots that day: 1,355.
Fire radiative power (FRP) measures the energy the fire gives off when the satellite passes. Added up by day, it compares intensity, not area.
Fire Weather Index (Canadian system) computed by WorldFires for the day the fire started. Consecutive days without rain before: 15.
This is an index computed from weather model data, not a measurement of the fire nor an official warning. Danger warnings are issued by each country’s authority. Emergency number and official warnings
High of 34.6 °C and minimum humidity of 26% on 1 July 2021; gusts of 42 km/h on 16 July 2021.
These are model values for a cell of about 25 km, not from a weather station: they may differ from what was measured on the ground.
This page’s change log has been kept since 24 October 2026: every night what it publishes is compared and the difference is logged. Anything earlier is reconstructed from each source’s date and marked as reconstructed.
Every night a snapshot of what the page shows is saved. If anything changes, it appears in the list as a log entry.
A version keeps the area, dates, name and official record; the area as it was logged (changes under 2% are not logged). The map, hotspots and weather always show today’s data.
| fecha | focos_viirs | frp_mw | tmax_c | tmin_c | hr_min_pct | viento_max_kmh | racha_max_kmh | precip_mm | fwi | clase_fwi | dentro_del_incendio |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2021-06-25 | 1 | 24 | 22.9 | 13.7 | 72 | 8 | 20.5 | 7.3 | 0.6 | muy_bajo | 1 |
| 2021-06-26 | 21 | 447 | 26 | 13.9 | 56 | 7.9 | 24.8 | 3.1 | 2.8 | muy_bajo | 1 |
| 2021-06-27 | 34 | 371 | 27.1 | 12.7 | 47 | 6.5 | 17.3 | 0.6 | 1.8 | muy_bajo | 1 |
| 2021-06-28 | 16 | 174 | 29.1 | 13 | 39 | 10.7 | 24.1 | 0 | 13 | moderado | 1 |
| 2021-06-29 | 0 | 0 | 26.4 | 15.1 | 58 | 10.6 | 29.5 | 3.6 | 3.8 | muy_bajo | 1 |
| 2021-06-30 | 32 | 195 | 27.5 | 15.1 | 58 | 10.2 | 29.5 | 2.1 | 0.7 | muy_bajo | 1 |
| 2021-07-01 | 101 | 1,444 | 34.6 | 15.9 | 26 | 14.4 | 23.4 | 0 | 13.2 | moderado | 1 |
| 2021-07-02 | 738 | 13,735 | 34.1 | 15 | 28 | 13.3 | 23.4 | 0 | 23.1 | alto | 1 |
| 2021-07-03 | 1,153 | 23,181 | 32.7 | 14.9 | 30 | 12.3 | 33.1 | 0 | 23 | alto | 1 |
| 2021-07-04 | 476 | 4,060 | 29.3 | 13.4 | 42 | 11.1 | 35.3 | 2.6 | 20.7 | moderado | 1 |
| 2021-07-05 | 170 | 842 | 25.2 | 15.1 | 37 | 15.3 | 38.2 | 0.3 | 9.5 | bajo | 1 |
| 2021-07-06 | 337 | 4,363 | 26.5 | 11.8 | 50 | 10.1 | 31.3 | 0.4 | 12.3 | moderado | 1 |
| 2021-07-07 | 990 | 7,223 | 31.4 | 12.6 | 31 | 11.4 | 27.7 | 0 | 20.5 | moderado | 1 |
| 2021-07-08 | 1,355 | 28,483 | 34.2 | 16.1 | 30 | 14.2 | 33.5 | 0 | 29.6 | alto | 1 |
| 2021-07-09 | 7 | 30 | 26.6 | 18.4 | 56 | 14.2 | 40.3 | 4.3 | 6.2 | bajo | 1 |
| 2021-07-10 | 0 | 0 | 18.4 | 10.5 | 62 | 14.1 | 27.7 | 5.2 | 0.2 | muy_bajo | 1 |
| 2021-07-11 | 0 | 0 | 21 | 8.8 | 33 | 13.4 | 34.6 | 0 | 2.4 | muy_bajo | 1 |
| 2021-07-12 | 173 | 415 | 23.3 | 9.5 | 40 | 11.3 | 26.3 | 0 | 6.7 | bajo | 1 |
| 2021-07-13 | 778 | 5,471 | 25.3 | 9.8 | 40 | 8.2 | 19.8 | 0 | 11.2 | moderado | 1 |
| 2021-07-14 | 1,477 | 18,769 | 29.2 | 10.2 | 33 | 12.5 | 30.6 | 0 | 19 | moderado | 1 |
| 2021-07-15 | 340 | 7,342 | 25.4 | 12.3 | 44 | 14.3 | 33.5 | 0 | 18.6 | moderado | 1 |
| 2021-07-16 | 1,525 | 4,848 | 21.5 | 13.3 | 34 | 16 | 41.8 | 0.1 | 21.8 | alto | 1 |
| 2021-07-17 | 1,015 | 5,727 | 25.1 | 8.8 | 32 | 14 | 36.7 | 0 | 24.2 | alto | 1 |
| 2021-07-18 | 399 | 3,021 | 27.8 | 13.6 | 44 | 11.5 | 22 | 0 | 17.2 | moderado | 1 |
| 2021-07-19 | 1,822 | 27,708 | 32.3 | 15.2 | 34 | 14.2 | 29.5 | 0 | 18.3 | moderado | 1 |
| 2021-07-20 | 180 | 914 | 25.8 | 15.9 | 55 | 14.6 | 26.6 | 0.2 | 16.1 | moderado | 1 |
| 2021-07-21 | 2 | 3 | 20.4 | 15.4 | 68 | 12.7 | 34.6 | 3.3 | 3.4 | muy_bajo | 1 |
| 2021-07-22 | 116 | 758 | 28 | 13.5 | 36 | 12.9 | 31 | 0 | 11.4 | moderado | 1 |
| 2021-07-23 | 8 | 48 | 25.4 | 12.2 | 49 | 12.4 | 30.2 | 3.1 | 15.1 | moderado | 1 |
| 2021-07-24 | 0 | 0 | 22.3 | 16 | 62 | 15.5 | 31.7 | 11.6 | 0 | muy_bajo | 0 |
It is generated in your browser from this page’s data: one file per fire, aggregated by day and without individual hotspots.
It updates itself while the fire is still active and links to this page. Free, with the attribution shown at the bottom.
Sources for this page: GWIS (Copernicus), NASA FIRMS (VIIRS), ERA5 (ECMWF/Copernicus C3S) · Open-Meteo.com (CC BY 4.0), GHSL (JRC). Open-Meteo.com · How we build fire pages: methodology
Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.
It had gone 15 days without rain (1 mm or more) when it started. Rain came after the fire: 11.6 mm on 24 Jul.
No earlier perimeters overlap this fire since 2016, when the satellite record begins.
London boundary: geoBoundaries · Office for National Statistics (Open Government Licence v3.0).
Moscow boundary: geoBoundaries · OpenStreetMap, Wambacher · © OpenStreetMap contributors (ODbL 1.0).
Paris boundary: geoBoundaries · Institut national de l'information géographique et forestière (IGN-F) (Etalab Open License 2.0).
Madrid boundary: geoBoundaries · Open Data ESRI, IGN Central Registry of Cartography Area (CC BY 4.0).
This compares size, not location: both shapes are at the same scale, north up, centred on each other.
Burnt area inside each municipality, from crossing the GWIS perimeter with administrative boundaries. The distance runs from the point marking the centre of each area to the nearest fire: staying a kilometre away does not mean it reached the houses.
Inside the perimeter there was no noticeable built-up land and almost nobody lived there (GHSL 2020, satellite-based estimate).
This is an estimate on 100 m cells, made from satellite imagery and census data: it does not mean that homes burned or that anyone was harmed. The perimeter also contains land that never burned.
Source: Global Human Settlement Layer (GHS-BUILT-S and GHS-POP R2023A), European Commission Joint Research Centre (JRC), © European Union, CC BY 4.0. Sum inside the perimeter computed by WorldFires. human-settlement.emergency.copernicus.eu
ECMWF ERA5 reanalysis at the fire location, the standard reference for past weather, and the Canadian Fire Weather Index (the same system Copernicus uses), computed by WorldFires from that data. Days after the fire run until the first rain.
Open-Meteo.com (CC BY 4.0) · Copernicus Climate Change Service (ERA5)
| Day | High | Min. humidity | Peak gust | Rain | Danger (FWI) |
|---|---|---|---|---|---|
| 25 Jun | 22.9 °C | 72 % | 20 km/h | 7.3 mm | Very low 1 |
| 26 Jun | 26.0 °C | 56 % | 25 km/h | 3.1 mm | Very low 3 |
| 27 Jun | 27.1 °C | 47 % | 17 km/h | 0.6 mm | Very low 2 |
| 28 Jun | 29.1 °C | 39 % | 24 km/h | 0.0 mm | Moderate 13 |
| 29 Jun | 26.4 °C | 58 % | 30 km/h | 3.6 mm | Very low 4 |
| 30 Jun | 27.5 °C | 58 % | 30 km/h | 2.1 mm | Very low 1 |
| 1 Jul | 34.6 °C | 26 % | 23 km/h | 0.0 mm | Moderate 13 |
| 2 Jul | 34.1 °C | 28 % | 23 km/h | 0.0 mm | High 23 |
| 3 Jul | 32.7 °C | 30 % | 33 km/h | 0.0 mm | High 23 |
| 4 Jul | 29.3 °C | 42 % | 35 km/h | 2.6 mm | Moderate 21 |
| 5 Jul | 25.2 °C | 37 % | 38 km/h | 0.3 mm | Low 10 |
| 6 Jul | 26.5 °C | 50 % | 31 km/h | 0.4 mm | Moderate 12 |
| 7 Jul | 31.4 °C | 31 % | 28 km/h | 0.0 mm | Moderate 20 |
| 8 Jul | 34.2 °C | 30 % | 34 km/h | 0.0 mm | High 30 |
| 9 Jul | 26.6 °C | 56 % | 40 km/h | 4.3 mm | Low 6 |
| 10 Jul | 18.4 °C | 62 % | 28 km/h | 5.2 mm | Very low 0 |
| 11 Jul | 21.0 °C | 33 % | 35 km/h | 0.0 mm | Very low 2 |
| 12 Jul | 23.3 °C | 40 % | 26 km/h | 0.0 mm | Low 7 |
| 13 Jul | 25.3 °C | 40 % | 20 km/h | 0.0 mm | Moderate 11 |
| 14 Jul | 29.2 °C | 33 % | 31 km/h | 0.0 mm | Moderate 19 |
| 15 Jul | 25.4 °C | 44 % | 34 km/h | 0.0 mm | Moderate 19 |
| 16 Jul | 21.5 °C | 34 % | 42 km/h | 0.1 mm | High 22 |
| 17 Jul | 25.1 °C | 32 % | 37 km/h | 0.0 mm | High 24 |
| 18 Jul | 27.8 °C | 44 % | 22 km/h | 0.0 mm | Moderate 17 |
| 19 Jul | 32.3 °C | 34 % | 30 km/h | 0.0 mm | Moderate 18 |
| 20 Jul | 25.8 °C | 55 % | 27 km/h | 0.2 mm | Moderate 16 |
| 21 Jul | 20.4 °C | 68 % | 35 km/h | 3.3 mm | Very low 3 |
| 22 Jul | 28.0 °C | 36 % | 31 km/h | 0.0 mm | Moderate 11 |
| 23 Jul | 25.4 °C | 49 % | 30 km/h | 3.1 mm | Moderate 15 |
| 24 Jul after | 22.3 °C | 62 % | 32 km/h | 11.6 mm | Very low 0 |
Drag the line to compare the same ground before the fire and after it.
If the day is cloudy, change the date: each satellite passes once a day. In false colour the burnt ground looks brown or red.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
A satellite detection is not an official report. Final figures and the fire’s status are published by each country’s emergency service.
Emergency number: 112 · Emergency number and official warnings
Satellite cross-check
RSS Changes to this page With cross-checks and a citable version
This page is built from satellite data and official records, and it sometimes gets things wrong: the wrong dates, the wrong town, two fires merged into one, or something that was not a wildfire at all. If you know this fire first-hand (you live nearby, saw it, fought it or reported on it), tell us what really happened and we will check it.
The perimeter comes from the Copernicus Global Wildfire Information System (GWIS), which rebuilds it from MODIS and VIIRS heat detections and publishes it under CC BY 4.0. It is not measured on imagery as in Europe, so it is an estimate. Heat detections come from the VIIRS sensors aboard Suomi-NPP and NOAA-20, distributed by NASA FIRMS at 375 m resolution. Municipal boundaries come from geoBoundaries ADM2 (Open Data Commons Open Database License 1.0). The area per municipality is computed by WorldFires by crossing the perimeter with those boundaries, so it may differ from each country’s official figure.