How long did the Mappi fire last?

According to the heat detections seen by satellite inside the perimeter, it burned from 6 September 2026 to 13 September 2026 (8 days). The perimeter dates it from 8 September 2026 to 13 September 2026.

How much area did it burn?

The perimeter GWIS (Copernicus) rebuilt from heat detections is 2,104 hectares (21.0 km²). It is an estimate: official national figures may differ.

Which municipalities burned?

The fire only entered Mappi (2,119 ha, 0.1 %).

What was the weather like?

During the fire the temperature reached 34.3 °C, humidity dropped to 36 % and gusts hit 40 km/h. The fire danger index (FWI) reached 28, 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.

ID · Indonesia · 2026-09-06 → 2026-09-13

Mappi fire, 6 September 2026 Mappi

Out · last detection 13 Sept 2026, 16:39 UTC

The fire started on 6 September 2026 in Mappi, Indonesia, and satellites saw it burning for 8 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 2,104 hectares from heat detections, spread across a single municipality.

It is the 211th largest in Papua since 2016 (of 363 with a page). Number 626 in Indonesia in 2026, of 1005.

Burnt area: 2,104ha; GWIS perimeter (Copernicus)
Duration: 8days; 6 Sept 2026 – 13 Sept 2026
Municipalities hit: 1; regencies
Started on: 6 Sept; 2026
Heat detections: 55; in a single hotspot: 89 MW
Danger at start: 19; Moderate · FWI index
Energy released: 615MW; sum of detected power

Play back 13 Sept 2026

HOTSPOTS BY DAY 6 Sept13 Sept

How it evolved, day by day

69111213

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

36%lowest humidity

It had gone 6 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

Mappi where it started

2,119 ha reached on 6 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)
6 Sept	34.2 °C	38 %	25 km/h	0.0 mm	Moderate 19
7 Sept	33.8 °C	41 %	23 km/h	0.0 mm	Moderate 20
8 Sept	33.5 °C	44 %	21 km/h	0.0 mm	Moderate 20
9 Sept	33.5 °C	40 %	18 km/h	0.0 mm	Moderate 20
10 Sept	33.5 °C	41 %	34 km/h	0.0 mm	High 24
11 Sept	32.8 °C	37 %	36 km/h	0.0 mm	High 26
12 Sept	33.3 °C	36 %	33 km/h	0.0 mm	High 24
13 Sept	29.8 °C	48 %	32 km/h	0.0 mm	High 22
14 Sept after	30.8 °C	49 %	35 km/h	0.0 mm	High 22
15 Sept after	30.4 °C	52 %	34 km/h	0.3 mm	Moderate 21
16 Sept after	30.4 °C	50 %	32 km/h	0.0 mm	Moderate 21
17 Sept after	32.8 °C	43 %	35 km/h	0.2 mm	High 23
18 Sept after	33.2 °C	40 %	36 km/h	0.0 mm	High 25
19 Sept after	30.9 °C	50 %	40 km/h	0.0 mm	High 26
20 Sept after	31.1 °C	50 %	34 km/h	0.0 mm	High 24
21 Sept after	32.6 °C	47 %	27 km/h	0.1 mm	High 23
22 Sept after	33.1 °C	45 %	31 km/h	0.0 mm	High 24
23 Sept after	30.9 °C	55 %	29 km/h	0.0 mm	High 21
24 Sept after	32.0 °C	50 %	27 km/h	0.2 mm	Moderate 21
25 Sept after	33.4 °C	44 %	29 km/h	0.2 mm	High 23
26 Sept after	33.8 °C	42 %	32 km/h	0.1 mm	High 25
27 Sept after	34.3 °C	40 %	32 km/h	0.0 mm	High 26
28 Sept after	34.2 °C	40 %	34 km/h	0.0 mm	High 27
29 Sept after	34.2 °C	37 %	31 km/h	0.0 mm	High 28
30 Sept after	32.5 °C	48 %	22 km/h	1.3 mm	Moderate 14
1 Oct after	34.1 °C	39 %	36 km/h	0.0 mm	High 28
2 Oct after	33.9 °C	43 %	40 km/h	0.0 mm	High 28
3 Oct after	33.2 °C	45 %	33 km/h	0.0 mm	High 27
4 Oct after	33.9 °C	44 %	30 km/h	0.1 mm	High 26
5 Oct after	34.6 °C	41 %	27 km/h	0.2 mm	High 26

Before and after, from space

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

↔

Before · 30 Aug 2026

After · 20 Sept 2026

Before After

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 12 September 2026 the air beside the fire reached 201 µg/m³ of PM2.5. That day averaged 89: 5.9 times the WHO daily guideline (15).

PM2.5 peak201 µg/m³

Days over the guideline11 days

PM10207 µg/m³

Optical depth2.74

WHO 15

678910111213141516

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 · 55Every 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 time	Satellite	FRP (MW)	Lat	Lon

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 6 September 2026 to 13 September 2026 (8 days). The perimeter dates it from 8 September 2026 to 13 September 2026.
How much area did it burn?: The perimeter GWIS (Copernicus) rebuilt from heat detections is 2,104 hectares (21.0 km²). It is an estimate: official national figures may differ.
Which municipalities burned?: The fire only entered Mappi (2,119 ha, 0.1 %).
What was the weather like?: During the fire the temperature reached 34.3 °C, humidity dropped to 36 % and gusts hit 40 km/h. The fire danger index (FWI) reached 28, 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

NASA FIRMS ↗
GWIS · Copernicus ↗

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.

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What really happened?

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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.

Where it burned