Xon fire, 7 March 2016 Xon, Phonthong
The fire started on 7 March 2016 in Xon, Laos, and satellites saw it burning for 17 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 4,779 hectares from heat detections, spread across 2 municipalities.
It is the 26th largest in Houaphan since 2016 (of 132 with a page). Number 22 in Laos in 2016, of 143.
- Burnt area
- 4,779ha
- GWIS perimeter (Copernicus)
- Duration
- 17days
- 7 Mar 2016 – 23 Mar 2016
- Municipalities hit
- 2
- districts
- Started on
- 7 Mar
- 2016
- Heat detections
- 269
- in a single hotspot: 40 MW
- Danger at start
- 11
- Moderate · FWI index
- Energy released
- 1.8GW
- 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 7 days without rain (1 mm or more) when it started. Rain came after the fire: 4.8 mm on 24 Mar.
This area had burned before
No earlier perimeters overlap this fire since 2016, when the satellite record begins.
What happened to each town
-
Xon where it started4,472 ha reached on 7 Mar2.2 %
-
334 ha reached on 9 Mar0.2 %
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) |
|---|---|---|---|---|---|
| 7 Mar | 26.8 °C | 41 % | 49 km/h | 0.0 mm | Low 11 |
| 8 Mar | 26.9 °C | 41 % | 52 km/h | 0.0 mm | Moderate 12 |
| 9 Mar | 27.4 °C | 36 % | 45 km/h | 0.0 mm | Moderate 13 |
| 10 Mar | 30.0 °C | 33 % | 35 km/h | 0.0 mm | Moderate 14 |
| 11 Mar | 24.9 °C | 55 % | 37 km/h | 1.1 mm | Very low 5 |
| 12 Mar | 23.2 °C | 58 % | 52 km/h | 1.0 mm | Low 6 |
| 13 Mar | 27.3 °C | 41 % | 44 km/h | 0.0 mm | Low 10 |
| 14 Mar | 25.8 °C | 55 % | 34 km/h | 0.5 mm | Low 10 |
| 15 Mar | 27.2 °C | 46 % | 47 km/h | 0.0 mm | Moderate 12 |
| 16 Mar | 27.8 °C | 41 % | 49 km/h | 0.0 mm | Moderate 14 |
| 17 Mar | 28.7 °C | 33 % | 53 km/h | 0.0 mm | Moderate 18 |
| 18 Mar | 27.9 °C | 34 % | 47 km/h | 0.0 mm | Moderate 18 |
| 19 Mar | 27.8 °C | 41 % | 49 km/h | 0.1 mm | Moderate 18 |
| 20 Mar | 28.6 °C | 39 % | 48 km/h | 0.6 mm | Moderate 16 |
| 21 Mar | 27.8 °C | 39 % | 48 km/h | 0.0 mm | Moderate 16 |
| 22 Mar | 27.9 °C | 39 % | 49 km/h | 0.0 mm | Moderate 17 |
| 23 Mar | 28.1 °C | 43 % | 34 km/h | 0.0 mm | Moderate 15 |
| 24 Mar after | 20.1 °C | 74 % | 41 km/h | 4.8 mm | Very low 0 |
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 · 269Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 10,304 haPhonthong3 April 2026 · 16 days · 21 km away
- 11,662 haXon27 March 2026 · 23 days · 23 km away
- 8,294 haPhonthong27 March 2020 · 9 days · 25 km away
- 7,838 haViengkham3 April 2026 · 17 days · 29 km away
- 7,563 haXamneua2 March 2016 · 16 days · 29 km away
- 19,664 haXamneua4 April 2023 · 22 days · 37 km away
Frequently asked questions
- How long did the Xon fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 7 March 2016 to 23 March 2016 (17 days). The perimeter dates it from 14 March 2016 to 23 March 2016.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 4,779 hectares (47.8 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire entered 2 municipalities: Xon (4,472 ha, 2.2 %); Phonthong (334 ha, 0.2 %).
- What was the weather like?
- During the fire the temperature reached 30.0 °C, humidity dropped to 33 % and gusts hit 53 km/h. The fire danger index (FWI) reached 18, class Moderate.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Laos (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.
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.