Skip to content
worldfires
DZ · Algeria · →

Asfour fire, 31 July 2017 عصفور · Asfour, Chihani

Out · last detection 31 Jul 2017, 13:20 UTC

The fire started on 31 July 2017 in Asfour, Algeria, and satellites saw it burning for 1 day. Copernicus mapped a burnt perimeter of 109 hectares from satellite imagery, spread across 2 municipalities.

It is the 110th largest in El Tarf since 2016 (of 121 with a page). Number 159 in Algeria in 2017, of 173.

The power measured by the satellite is low (16.2 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
109ha
Copernicus perimeter
Duration
1day
31 Jul 2017 – 31 Jul 2017
Municipalities hit
2
communes
Started on
31 Jul
2017
Heat detections
7
in a single hotspot: 16 MW
Danger at start
37
High · FWI index
Energy released
88MW
sum of detected power

Where it burned

HOTSPOTS BY DAY 31 Jul31 Jul

How it evolved, day by day

31

Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.

The weather it burned in

38°high
31km/h · peak gust
28%lowest humidity

It had gone 28 days without rain (1 mm or more) when it started.

This area had burned before

No earlier perimeters overlap this fire since 2016, when the satellite record begins.

What happened to each town

  1. Asfour عصفور 11,447 inhabitants · 4.2 km from the town where it started
    85 ha reached on 31 Jul
    0.8 %
  2. Chihani الشيحاني 10,094 inhabitants · 18.9 km from the town
    25 ha reached on 31 Jul
    0.1 %

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 forest70 %
  • Other natural land30 %

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)
31 Jul 38.4 °C 28 % 31 km/h 0.0 mm High 37
1 Aug after 37.3 °C 30 % 29 km/h 0.0 mm Very high 38
2 Aug after 34.6 °C 44 % 35 km/h 0.0 mm High 33
3 Aug after 38.0 °C 25 % 34 km/h 0.0 mm Very high 44
4 Aug after 37.0 °C 30 % 42 km/h 0.0 mm Very high 45
5 Aug after 33.3 °C 51 % 30 km/h 0.0 mm High 29
6 Aug after 32.6 °C 54 % 30 km/h 0.0 mm High 27
7 Aug after 33.0 °C 49 % 35 km/h 0.0 mm High 29
8 Aug after 36.5 °C 37 % 26 km/h 0.0 mm High 28
9 Aug after 34.3 °C 49 % 38 km/h 0.0 mm High 32
10 Aug after 29.5 °C 63 % 40 km/h 0.0 mm High 26

Before and after, from space

Drag the line to compare the same ground before the fire and after it.

Before · 24 Jul 2017
After · 7 Aug 2017

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 · Copernicus

On 31 July 2017 the air beside the fire reached 136 µg/m³ of PM2.5. That day averaged 68: 4.5 times the WHO daily guideline (15).

PM2.5 peak136 µg/m³
Days over the guideline5 days
PM10167 µg/m³
293031123
Good Fair Moderate Poor Very poor Extremely poor

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 · 7Every satellite heat detection, one by one, with time, satellite, power and coordinates.
⬇ Download CSV Times in UTC. Each detection is a 375 m pixel: a large fire yields hundreds per pass.
Date and timeSatelliteFRP (MW)LatLon

Other fires nearby

All fires in Algeria ›

Frequently asked questions

How long did the Asfour fire last?
Copernicus dates it between 31 July 2017 and 31 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 109 hectares (1.1 km²). Official national figures may differ.
Which municipalities burned?
The fire entered 2 municipalities: Asfour (85 ha, 0.8 %); Chihani (25 ha, 0.1 %).
Did the fire reach a town?
The closest fire to a town centre came within 4.2 km of Asfour. 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 38.4 °C, humidity dropped to 28 % and gusts hit 31 km/h. The fire danger index (FWI) reached 37, class 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
What do you think is wrong?

We will only use your email to reply about this report. Privacy. This is not an emergency service: if there is a fire now, call 14 · 1021.

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.