Halmahera Timur fire, 17 September 2026 Halmahera Timur, Halmahera Tengah
The fire started on 17 September 2026 in Halmahera Timur, Indonesia, and satellites saw it burning for 22 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 1,532 hectares from heat detections, spread across 2 municipalities.
It is the 24th largest in North Maluku since 2016 (of 27 with a page). Number 951 in Indonesia in 2026, of 988.
The power measured by the satellite is low (16.5 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
- 1,532ha
- GWIS perimeter (Copernicus)
- Duration
- 22days
- 17 Sept 2026 – 8 Oct 2026
- Municipalities hit
- 2
- regencies
- Started on
- 17 Sept
- 2026
- Heat detections
- 73
- in a single hotspot: 17 MW
- Danger at start
- 19
- Moderate · FWI index
- Energy released
- 229MW
- 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 46 days without rain (1 mm or more) when it started.
This area had burned before
14% of the perimeter overlaps earlier fires recorded since 2016: 222 ha in 2023.
What happened to each town
-
Halmahera Timur where it started1,533 ha reached on 17 Sept0.2 %
-
9 ha reached on 1 Oct0.0 %
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) |
|---|---|---|---|---|---|
| 11 Sept | 29.4 °C | 54 % | 34 km/h | 0.6 mm | Moderate 19 |
| 12 Sept | 29.8 °C | 52 % | 28 km/h | 0.0 mm | Moderate 19 |
| 13 Sept | 29.2 °C | 49 % | 55 km/h | 0.0 mm | High 27 |
| 14 Sept | 30.0 °C | 46 % | 40 km/h | 0.0 mm | High 24 |
| 15 Sept | 29.1 °C | 50 % | 46 km/h | 0.0 mm | High 26 |
| 16 Sept | 29.4 °C | 50 % | 40 km/h | 0.0 mm | High 25 |
| 17 Sept | 29.4 °C | 51 % | 34 km/h | 0.0 mm | High 23 |
| 18 Sept | 30.5 °C | 47 % | 32 km/h | 0.0 mm | High 23 |
| 19 Sept | 30.5 °C | 46 % | 28 km/h | 0.0 mm | High 22 |
| 20 Sept | 31.0 °C | 45 % | 27 km/h | 0.0 mm | High 22 |
| 21 Sept | 30.0 °C | 51 % | 30 km/h | 0.0 mm | High 23 |
| 22 Sept | 30.3 °C | 47 % | 35 km/h | 0.0 mm | High 24 |
| 23 Sept | 30.6 °C | 46 % | 26 km/h | 0.0 mm | High 22 |
| 24 Sept | 30.2 °C | 50 % | 28 km/h | 0.0 mm | High 24 |
| 25 Sept | 30.4 °C | 52 % | 32 km/h | 0.0 mm | High 25 |
| 26 Sept | 29.7 °C | 55 % | 34 km/h | 0.0 mm | High 24 |
| 27 Sept | 30.0 °C | 54 % | 35 km/h | 0.0 mm | High 24 |
| 28 Sept | 29.4 °C | 58 % | 34 km/h | 0.0 mm | High 22 |
| 29 Sept | 31.8 °C | 40 % | 31 km/h | 0.1 mm | High 26 |
| 30 Sept | 31.4 °C | 45 % | 26 km/h | 0.0 mm | High 24 |
| 1 Oct | 30.8 °C | 43 % | 36 km/h | 0.0 mm | High 27 |
| 2 Oct | 31.1 °C | 41 % | 40 km/h | 0.0 mm | High 29 |
| 3 Oct | 31.1 °C | 41 % | 40 km/h | 0.0 mm | High 30 |
| 4 Oct | 31.6 °C | 41 % | 43 km/h | 0.0 mm | High 30 |
| 5 Oct | 31.7 °C | 44 % | 37 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.
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 4 October 2026 the air beside the fire reached 166 µg/m³ of PM2.5. That day averaged 93: 6.2 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 · 73Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 33,930 haHalmahera TengahAugust 2026 · 65 days · 12 km away
- 1,552 haHalmahera TimurSeptember 2019 · 11 days · 15 km away
- 1,524 haHalmahera Timur30 September 2026 · 10 days · 29 km away
- 1,654 haHalmahera Timur11 September 2026 · 15 days · 30 km away
- 18,912 haHalmahera Timur29 August 2026 · 45 days · 31 km away
- 2,200 haHalmahera Timur18 September 2026 · 23 days · 37 km away
Frequently asked questions
- How long did the Halmahera Timur fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 17 September 2026 to 8 October 2026 (22 days). The perimeter dates it from 23 September 2026 to 1 October 2026.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 1,532 hectares (15.3 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire entered 2 municipalities: Halmahera Timur (1,533 ha, 0.2 %); Halmahera Tengah (9 ha, 0.0 %).
- Is the Halmahera Timur fire still active?
- No fire detections since 9 Oct 2026, 17:11 UTC. A lack of detections is not an official extinction.
- What was the weather like?
- During the fire the temperature reached 31.8 °C, humidity dropped to 40 % and gusts hit 55 km/h. The fire danger index (FWI) reached 30, 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
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.