Longjiang County fire, 31 October 2022 龙江县 · Longjiang County
The fire started on 31 October 2022 in Longjiang County, China, and satellites saw it burning for 4 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 4,126 hectares from heat detections, spread across a single municipality.
It is the 203th largest in Heilongjiang Province since 2016 (of 1765 with a page). Number 11 in China in 2022, of 212.
Compare with…
We have the GWIS perimeter for this fire, but the VIIRS sensors did not capture it in enough detail: no day-by-day evolution, but the split by municipality is there.
- Burnt area
- 4,126ha
- GWIS perimeter (Copernicus)
- Duration
- 4days
- 31 Oct 2022 – 3 Nov 2022
- Municipalities hit
- 1
- counties
- Started on
- 31 Oct
- 2022
- Danger at start
- 14
- Moderate · FWI index
Where it burned
The weather it burned in
It had gone 4 days without rain (1 mm or more) when it started. Rain came after the fire: 1.6 mm on 11 Nov.
This area had burned before
58% of the perimeter overlaps earlier fires recorded since 2016: 829 ha in 2016, 242 ha in 2019, 2,143 ha in 2020. Part of it burned more than once, so the yearly figures add up to more than the 2,378 ha that had burned before.
How big is it?
London boundary: geoBoundaries · Office for National Statistics (Open Government Licence v3.0).
Beijing (Dongcheng and Xicheng) boundary: geoBoundaries · Lee Beryman, OpenStreetMap · © 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.
What happened to each town
-
4,126 ha0.7 %
Burnt area inside each municipality, from crossing the GWIS perimeter with administrative boundaries. The distance is from the town centre to the nearest fire: staying a kilometre away does not mean it reached the houses.
The weather day by day
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) |
|---|---|---|---|---|---|
| 31 Oct | 10.7 °C | 36 % | 46 km/h | 0.6 mm | Moderate 14 |
| 1 Nov | 4.7 °C | 26 % | 48 km/h | 0.0 mm | Moderate 15 |
| 2 Nov | 0.7 °C | 24 % | 50 km/h | 0.0 mm | Moderate 16 |
| 3 Nov | 1.3 °C | 24 % | 38 km/h | 0.0 mm | Moderate 13 |
| 4 Nov after | 5.6 °C | 31 % | 24 km/h | 0.0 mm | Low 11 |
| 5 Nov after | 4.3 °C | 34 % | 26 km/h | 0.0 mm | Moderate 12 |
| 6 Nov after | 8.6 °C | 30 % | 18 km/h | 0.0 mm | Moderate 11 |
| 7 Nov after | 7.9 °C | 31 % | 31 km/h | 0.0 mm | Moderate 13 |
| 8 Nov after | 8.6 °C | 40 % | 16 km/h | 0.0 mm | Low 11 |
| 9 Nov after | 8.3 °C | 39 % | 26 km/h | 0.0 mm | Moderate 12 |
| 10 Nov after | 4.4 °C | 26 % | 19 km/h | 0.0 mm | Low 11 |
| 11 Nov after | 7.0 °C | 46 % | 35 km/h | 1.6 mm | Very low 4 |
Before and after, from space
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.
The smoke
CAMS · CopernicusOn 30 October 2022 the air beside the fire reached 57 µg/m³ of PM2.5. That day averaged 41: 2.7 times the WHO daily guideline (15).
Particles from the Copernicus CAMS model at the centre of the perimeter; these are not measurements in each town. The pale bar is the worst hour, the solid one the daily average.
Open-Meteo.com (CC BY 4.0) · Copernicus Atmosphere Monitoring Service (CAMS)
Other fires nearby
- 12,804 haLongjiang County 龙江县30 October 2025 · 9 days · 3 km away
- 14,703 haLongjiang County 龙江县11 April 2020 · 5 days · 9 km away
- 19,521 haLongjiang County 龙江县11 April 2020 · 5 days · 21 km away
- 7,187 haLongjiang County 龙江县27 October 2025 · 12 days · 22 km away
- 13,341 haLongjiang County 龙江县16 March 2026 · 13 days · 24 km away
- 12,133 haLongjiang County 龙江县9 April 2020 · 7 days · 24 km away
Frequently asked questions
- How long did the Longjiang County fire last?
- GWIS (Copernicus) dates it between 31 October 2022 and 3 November 2022: 4 days between the first and last heat detection of the perimeter.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 4,126 hectares (41.3 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Longjiang County (4,126 ha, 0.7 %).
- What was the weather like?
- During the fire the temperature reached 10.7 °C, humidity dropped to 24 % and gusts hit 50 km/h. The fire danger index (FWI) reached 16, class Moderate.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of China (geoBoundaries). It is not an official report.
Where to verify it
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: 119
Satellite cross-check
Does something look wrong on this page?
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.
Report an error
How we know this
- Perimeter: GWIS (Copernicus), rebuilt from heat detections rather than mapped on imagery.
- Dates from the perimeter: the VIIRS detections inside it did not change them. No Suomi-NPP VIIRS detections on those dates.
- We have not matched this page with any official record.
- Weather: Copernicus ERA5 reanalysis at the fire location, in cells of about 25 km.
Where this data comes from
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 ADM3 (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.