Lardjem fire, 23 July 2017 الأرجام · Lardjem
The fire started on 23 July 2017 in Lardjem, Algeria, and satellites saw it burning for 1 day. Copernicus mapped a burnt perimeter of 186 hectares from satellite imagery, spread across a single municipality.
It is the 8th largest in Tissemsilt since 2016 (of 12 with a page). Number 102 in Algeria in 2017, of 173.
The power measured by the satellite is low (27.1 MW in the strongest hotspot), more typical of grass or stubble burning, or a slow surface fire, than of a large crown fire.
- Burnt area
- 186ha
- Copernicus perimeter
- Duration
- 1day
- 23 Jul 2017 – 23 Jul 2017
- Municipalities hit
- 1
- communes
- Started on
- 23 Jul
- 2017
- Heat detections
- 5
- in a single hotspot: 27 MW
- Danger at start
- 49
- Very high · FWI index
- Energy released
- 50MW
- 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 3 days without rain (1 mm or more) when it started. Rain came after the fire: 1.0 mm on 31 Jul.
This area had burned before
No earlier perimeters overlap this fire since 2016, when the satellite record begins.
What happened to each town
-
186 ha reached on 23 Jul0.7 %
Burnt area inside each municipality, from crossing the official 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.
What burned
- Mixed forest63 %
- Other natural land25 %
- Agricultural areas10 %
- Broadleaved forest1.1 %
Land cover inside the perimeter as reported by Copernicus EFFIS (outside the Corine Land Cover area).
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) |
|---|---|---|---|---|---|
| 23 Jul | 38.7 °C | 18 % | 48 km/h | 0.6 mm | Very high 49 |
| 24 Jul after | 35.7 °C | 20 % | 44 km/h | 0.0 mm | Very high 48 |
| 25 Jul after | 36.3 °C | 17 % | 43 km/h | 0.0 mm | Very high 48 |
| 26 Jul after | 34.1 °C | 29 % | 40 km/h | 0.0 mm | Very high 42 |
| 27 Jul after | 37.5 °C | 19 % | 26 km/h | 0.0 mm | Very high 40 |
| 28 Jul after | 41.3 °C | 17 % | 35 km/h | 0.0 mm | Very high 48 |
| 29 Jul after | 39.4 °C | 24 % | 36 km/h | 0.0 mm | Very high 49 |
| 30 Jul after | 40.3 °C | 18 % | 28 km/h | 0.0 mm | Very high 44 |
| 31 Jul after | 41.6 °C | 16 % | 51 km/h | 1.0 mm | Very high 49 |
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 24 July 2017 the air beside the fire reached 60 µg/m³ of PM2.5. That day averaged 32: 2.2 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)
Detections table · 5Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 361 haLardjem الأرجامAugust 2019 · 3 days · 3 km away
- 459 haLardjem الأرجامJune 2019 · 2 days · 6 km away
- 355 haLardjem الأرجامAugust 2016 · 3 days · 11 km away
- 364 haLarbaa الأربعاءAugust 2016 · 2 days · 18 km away
- 323 haRamka الرمكةOctober 2020 · 1 day · 18 km away
- 514 haBeni Bouattab بني بوعتاب11 July 2017 · 4 days · 26 km away
Frequently asked questions
- How long did the Lardjem fire last?
- Copernicus dates it between 23 July 2017 and 23 July 2017: 1 day between the first and last image with fire.
- How much area did it burn?
- The perimeter Copernicus measured from satellite imagery is 186 hectares (1.9 km²). Official national figures may differ.
- Which municipalities burned?
- The fire only entered Lardjem (186 ha, 0.7 %).
- Did the fire reach a town?
- The closest fire to a town centre came within 10.3 km of Lardjem. That is the distance to the perimeter or nearest hotspot; it does not mean it entered the houses.
- What was the weather like?
- During the fire the temperature reached 38.7 °C, humidity dropped to 18 % and gusts hit 48 km/h. The fire danger index (FWI) reached 49, class Very high.
- Where does this data come from?
- From the EFFIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Algeria (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: 14 · 1021
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 and land cover come from the Copernicus European Forest Fire Information System (EFFIS), measured on MODIS and Sentinel-2 imagery and published under CC BY 4.0. 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 (Creative Commons Attribution-ShareAlike 2.0). The area per municipality is computed by WorldFires by crossing the perimeter with those boundaries, so it may differ slightly from each country’s official figure.