Koch fire, December 2017 Koch
The fire started on 28 December 2017 in Koch, South Sudan, and satellites saw it burning for 3 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 7,118 hectares from heat detections, spread across a single municipality.
It is the 36th largest in Unity since 2016 (of 85 with a page). Number 105 in South Sudan in 2017, of 203.
- Burnt area
- 7,118ha
- GWIS perimeter (Copernicus)
- Duration
- 3days
- 28 Dec 2017 – 30 Dec 2017
- Municipalities hit
- 1
- counties
- Started on
- 28 Dec
- 2017
- Heat detections
- 159
- in a single hotspot: 171 MW
- Danger at start
- 56
- Extreme · FWI index
- Energy released
- 2.9GW
- sum of detected power
Where it burned
How it evolved, day by day
Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.
The weather it burned in
It had gone 53 days without rain (1 mm or more) when it started.
This area had burned before
60% of the perimeter overlaps earlier fires recorded since 2016: 4,551 ha in 2016. Part of it burned more than once, so the yearly figures add up to more than the 4,261 ha that had burned before.
What happened to each town
-
Koch where it started7,161 ha reached on 28 Dec1.6 %
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) |
|---|---|---|---|---|---|
| 28 Dec | 39.2 °C | 13 % | 36 km/h | 0.0 mm | Extreme 56 |
| 29 Dec | 40.0 °C | 10 % | 32 km/h | 0.0 mm | Extreme 53 |
| 30 Dec | 40.0 °C | 9 % | 42 km/h | 0.0 mm | Extreme 62 |
| 31 Dec after | 38.5 °C | 11 % | 36 km/h | 0.0 mm | Extreme 64 |
| 1 Jan after | 35.0 °C | 12 % | 40 km/h | 0.0 mm | Extreme 64 |
| 2 Jan after | 33.5 °C | 14 % | 38 km/h | 0.0 mm | Extreme 58 |
| 3 Jan after | 34.5 °C | 15 % | 35 km/h | 0.0 mm | Extreme 54 |
| 4 Jan after | 34.9 °C | 14 % | 39 km/h | 0.0 mm | Extreme 57 |
| 5 Jan after | 34.0 °C | 12 % | 36 km/h | 0.0 mm | Extreme 58 |
| 6 Jan after | 34.3 °C | 11 % | 33 km/h | 0.0 mm | Extreme 56 |
| 7 Jan after | 35.6 °C | 8 % | 38 km/h | 0.0 mm | Extreme 57 |
| 8 Jan after | 35.9 °C | 9 % | 38 km/h | 0.0 mm | Extreme 58 |
| 9 Jan after | 35.9 °C | 9 % | 37 km/h | 0.0 mm | Extreme 58 |
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.
Detections table · 159Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 14,962 haKoch28 December 2018 · 16 days · 10 km away
- 7,846 haTonj North5 January 2016 · 7 days · 25 km away
- 8,948 haKoch28 February 2024 · 20 days · 32 km away
- 8,435 haTonj North26 January 2016 · 8 days · 32 km away
- 7,488 haKoch25 January 2018 · 6 days · 32 km away
- 10,377 haMayomDecember 2019 · 19 days · 35 km away
Frequently asked questions
- How long did the Koch fire last?
- GWIS (Copernicus) dates it between 28 December 2017 and 30 December 2017: 3 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 7,118 hectares (71.2 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Koch (7,161 ha, 1.6 %).
- What was the weather like?
- During the fire the temperature reached 40.0 °C, humidity dropped to 9 % and gusts hit 42 km/h. The fire danger index (FWI) reached 62, class Extreme.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of South Sudan (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.
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
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 ADM2 (Creative Commons Attribution 3.0 Intergovernmental Organisations (CC BY 3.0 IGO)). 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.