Phaisali fire, 1 December 2017 Phaisali, Tha Tako
The fire started on 1 December 2017 in Phaisali, Thailand, and satellites saw it burning for 2 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 1,073 hectares from heat detections, spread across 2 municipalities.
It is the 34th largest in Nakhon Sawan Province since 2016 (of 37 with a page). Number 213 in Thailand in 2017, of 240.
The power measured by the satellite is low (13.9 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
- 1,073ha
- GWIS perimeter (Copernicus)
- Duration
- 2days
- 1 Dec 2017 – 2 Dec 2017
- Municipalities hit
- 2
- districts
- Started on
- 1 Dec
- 2017
- Heat detections
- 22
- in a single hotspot: 14 MW
- Danger at start
- 13
- Moderate · FWI index
- Energy released
- 160MW
- 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 10 days without rain (1 mm or more) when it started.
This area had burned before
37% of the perimeter overlaps earlier fires recorded since 2016: 394 ha in 2016.
What happened to each town
-
Phaisali where it started645 ha reached on 1 Dec0.6 %
-
435 ha reached on 1 Dec0.5 %
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) |
|---|---|---|---|---|---|
| 1 Dec | 32.7 °C | 47 % | 37 km/h | 0.0 mm | Moderate 13 |
| 2 Dec | 33.0 °C | 47 % | 34 km/h | 0.0 mm | Moderate 14 |
| 3 Dec after | 32.8 °C | 48 % | 26 km/h | 0.0 mm | Moderate 11 |
| 4 Dec after | 33.0 °C | 48 % | 32 km/h | 0.0 mm | Moderate 13 |
| 5 Dec after | 30.7 °C | 49 % | 37 km/h | 0.0 mm | Moderate 14 |
| 6 Dec after | 32.1 °C | 49 % | 30 km/h | 0.0 mm | Moderate 14 |
| 7 Dec after | 33.3 °C | 49 % | 20 km/h | 0.0 mm | Moderate 12 |
| 8 Dec after | 32.4 °C | 50 % | 35 km/h | 0.0 mm | Moderate 16 |
| 9 Dec after | 30.5 °C | 48 % | 37 km/h | 0.0 mm | Moderate 16 |
| 10 Dec after | 32.2 °C | 48 % | 20 km/h | 0.0 mm | Moderate 13 |
| 11 Dec after | 33.3 °C | 48 % | 23 km/h | 0.0 mm | Moderate 14 |
| 12 Dec after | 34.2 °C | 52 % | 23 km/h | 0.1 mm | Moderate 15 |
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.
Detections table · 22Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 2,175 haTha TakoNovember 2019 · 9 days · 5 km away
- 1,479 haPhaisaliDecember 2016 · 7 days · 7 km away
- 1,231 haTha TakoDecember 2018 · 8 days · 11 km away
- 1,634 haNong Bua17 December 2017 · 5 days · 13 km away
- 1,540 haTha TakoApril 2026 · 8 days · 20 km away
- 1,315 haPhaisaliMarch 2026 · 3 days · 25 km away
Frequently asked questions
- How long did the Phaisali fire last?
- GWIS (Copernicus) dates it between 1 December 2017 and 2 December 2017: 2 days between the first and last heat detection of the perimeter.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 1,073 hectares (10.7 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire entered 2 municipalities: Phaisali (645 ha, 0.6 %); Tha Tako (435 ha, 0.5 %).
- What was the weather like?
- During the fire the temperature reached 33.0 °C, humidity dropped to 47 % and gusts hit 37 km/h. The fire danger index (FWI) reached 14, class Moderate.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Thailand (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: 199 · 191
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.