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Mappi fire, 25 September 2026 Mappi

Out · last detection 11 Oct 2026, 04:36 UTC

The fire started on 25 September 2026 in Mappi, Indonesia, and satellites saw it burning for 17 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 2,279 hectares from heat detections, spread across a single municipality.

It is the 191th largest in Papua since 2016 (of 363 with a page). Number 557 in Indonesia in 2026, of 988.

Burnt area
2,279ha
GWIS perimeter (Copernicus)
Duration
17days
25 Sept 2026 – 11 Oct 2026
Municipalities hit
1
regencies
Started on
25 Sept
2026
Heat detections
40
in a single hotspot: 46 MW
Danger at start
23
High · FWI index
Energy released
318MW
sum of detected power

Where it burned

11 Oct 2026
HOTSPOTS BY DAY 25 Sept11 Oct

How it evolved, day by day

252728291234567811

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

The weather it burned in

34°high
40km/h · peak gust
37%lowest humidity

It had gone 27 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. Mappi where it started
    2,296 ha reached on 25 Sept
    0.1 %

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)
25 Sept 33.5 °C 44 % 28 km/h 0.0 mm High 23
26 Sept 33.7 °C 42 % 34 km/h 0.0 mm High 26
27 Sept 34.2 °C 40 % 34 km/h 0.0 mm High 27
28 Sept 34.2 °C 39 % 35 km/h 0.0 mm High 28
29 Sept 34.3 °C 37 % 30 km/h 0.0 mm High 28
30 Sept 33.0 °C 44 % 23 km/h 0.0 mm High 26
1 Oct 33.3 °C 42 % 36 km/h 0.0 mm High 31
2 Oct 34.3 °C 41 % 40 km/h 0.0 mm High 32
3 Oct 33.3 °C 44 % 30 km/h 0.0 mm High 28
4 Oct 33.5 °C 44 % 31 km/h 0.0 mm High 29
5 Oct 34.5 °C 41 % 28 km/h 0.0 mm High 28

Before and after, from space

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

Before · 18 Sept 2026
After · 18 Oct 2026

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 30 September 2026 the air beside the fire reached 544 µg/m³ of PM2.5. That day averaged 213: 14 times the WHO daily guideline (15).

PM2.5 peak544 µg/m³
Days over the guideline12 days
PM10550 µg/m³
Optical depth3.65
23242526272829301234
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 · 40Every 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 Indonesia ›

Frequently asked questions

How long did the Mappi fire last?
According to the heat detections seen by satellite inside the perimeter, it burned from 25 September 2026 to 11 October 2026 (17 days). The perimeter dates it from 25 September 2026 to 8 October 2026.
How much area did it burn?
The perimeter GWIS (Copernicus) rebuilt from heat detections is 2,279 hectares (22.8 km²). It is an estimate: official national figures may differ.
Which municipalities burned?
The fire only entered Mappi (2,296 ha, 0.1 %).
Is the Mappi fire still active?
No fire detections since 11 Oct 2026, 04:36 UTC. A lack of detections is not an official extinction.
What was the weather like?
During the fire the temperature reached 34.3 °C, humidity dropped to 37 % and gusts hit 40 km/h. The fire danger index (FWI) reached 32, class High.
Where does this data come from?
From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Indonesia (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: 112

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 112.

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.