Burned area
satellite only3,270ha
Perimeter published by GWIS (Copernicus).
- Source
- GWIS (Copernicus)
- Date
- 1 Jan 2019 – 24 Jan 2019
+− cross-check
No official record is matched to this page to compare it with.
KH · Cambodia · –
Choam Ksant fire, 1 January 2019 Choam Ksant
Out · last detection 24 Jan 2019, 17:59 UTC
The fire started on 1 January 2019 in Choam Ksant, Cambodia, and satellites saw it burning for 24 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 3,270 hectares from heat detections, spread across a single municipality.
It is the 18th largest in Preah Vihear since 2016 (of 69 with a page). Number 28 in Cambodia in 2019, of 65.
Use this data
Compare with…
Use this data
Fire page data · version 2026-10-27matches the official recordwith caveatssatellite onlymodel
When copying, the sentence is
Tick the figures you want: they make up the lede and the CSV.
Duration by satellite
satellite only24days
1 Jan 2019 to 24 Jan 2019: first and last day with fire on the page.
- Source
- GWIS (Copernicus) · NASA FIRMS · VIIRS
- Date
- last detection: 24 Jan 2019, 17:59 UTC
+− cross-check
Satellites pass a few times a day and cloud or smoke can hide the fire: a lack of detections is not an official extinction. Each country’s emergency service declares a fire contained or out.
Start
satellite only1 Jan 2019
First day with fire seen by the satellites or the perimeter.
- Source
- GWIS (Copernicus) · NASA FIRMS · VIIRS
- Date
- 1 Jan 2019
+− cross-check
No official record is matched to this page, so the alert time and the cause are not known here.
Hotspots
satellite only227
VIIRS detections at 375 m. Most intense hotspot: 157 MW.
- Source
- NASA FIRMS · VIIRS (Suomi NPP)
- Date
- 1 Jan 2019 – 24 Jan 2019
+− cross-check
There is no official record to compare with. Each hotspot is a pixel detected in one satellite pass, not a separate fire.
The worst day
satellite only478MW
Total radiative power on 12 January 2019; hotspots that day: 44.
- Source
- NASA FIRMS · VIIRS (FRP)
- Date
- 12 Jan 2019
+− cross-check
Fire radiative power (FRP) measures the energy the fire gives off when the satellite passes. Added up by day, it compares intensity, not area.
Danger at the start
model12.1FWI · moderate
Fire Weather Index (Canadian system) computed by WorldFires for the day the fire started. Consecutive days without rain before: 2.
- Source
- WorldFires calculation (Canadian FWI system)
- Date
- 1 Jan 2019, local noon
- Model
- ERA5 0,25° (ECMWF · Copernicus C3S) · Open-Meteo.com
+− cross-check
This is an index computed from weather model data, not a measurement of the fire nor an official warning. Danger warnings are issued by each country’s authority. Emergency number and official warnings
Weather during the fire
model33.9°C · 41% RH
High of 33.9 °C and minimum humidity of 41% on 11 January 2019; gusts of 43 km/h on 1 January 2019.
- Source
- weather model at the fire’s grid cell
- Date
- 1 Jan 2019 – 24 Jan 2019
- Model
- ERA5 0,25° (ECMWF · Copernicus C3S) · Open-Meteo.com
+− cross-check
These are model values for a cell of about 25 km, not from a weather station: they may differ from what was measured on the ground.
This page’s change log has been kept since 24 October 2026: every night what it publishes is compared and the difference is logged. Anything earlier is reconstructed from each source’s date and marked as reconstructed.
Show
-
· reconstructed weatherWeather and FWI computed from the ERA5 reanalysis
-
logLast day with fire: 17 January 2019 → 24 January 2019.
-
logStart date: 7 January 2019 → 1 January 2019.
-
· reconstructed GHSLPopulation and built-up area computed
What was saved on 27 October 2026
Every night a snapshot of what the page shows is saved. If anything changes, it appears in the list as a log entry.
- Area
- 3,270 ha
- Dates
- 1 Jan 2019 – 24 Jan 2019
- Name
- Choam Ksant
- Official record
- —
Versioned permanent link
https://worldfires.org/en/fire/choam-ksant-2019-01?v=2026-10-27A version keeps the area, dates, name and official record; the area as it was logged (changes under 2% are not logged). The map, hotspots and weather always show today’s data.
Citation
A lede of about 60 words figures only, no adjectives
CSV for this fire choam-ksant-2019-01.csv · daily, no individual hotspots
| fecha | focos_viirs | frp_mw | tmax_c | tmin_c | hr_min_pct | viento_max_kmh | racha_max_kmh | precip_mm | fwi | clase_fwi | dentro_del_incendio |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2019-01-01 | 4 | 17 | 29.1 | 18.3 | 54 | 19.3 | 42.8 | 0 | 12.1 | moderado | 1 |
| 2019-01-02 | 1 | 5 | 29.1 | 18.5 | 51 | 19.2 | 42.8 | 0 | 12.7 | moderado | 1 |
| 2019-01-03 | 2 | 10 | 29.3 | 20 | 54 | 17.5 | 39.2 | 0 | 12.4 | moderado | 1 |
| 2019-01-04 | 0 | 0 | 30.6 | 20.7 | 53 | 14.9 | 33.8 | 0 | 11.9 | moderado | 1 |
| 2019-01-05 | 5 | 16 | 32.2 | 21.7 | 52 | 13.3 | 36 | 0 | 12 | moderado | 1 |
| 2019-01-06 | 0 | 0 | 33.4 | 22.8 | 50 | 11.9 | 37.1 | 0 | 12.5 | moderado | 1 |
| 2019-01-07 | 3 | 8 | 33.4 | 23.4 | 42 | 12.5 | 31 | 0 | 15.2 | moderado | 1 |
| 2019-01-08 | 4 | 44 | 33.7 | 22.8 | 42 | 12.2 | 33.1 | 0 | 15.9 | moderado | 1 |
| 2019-01-09 | 0 | 0 | 33 | 23.2 | 44 | 10.6 | 28.4 | 0 | 15.7 | moderado | 1 |
| 2019-01-10 | 24 | 228 | 33 | 22.7 | 46 | 12.6 | 31.3 | 0 | 17.1 | moderado | 1 |
| 2019-01-11 | 45 | 330 | 33.9 | 23.5 | 41 | 11.3 | 28.8 | 0 | 17.1 | moderado | 1 |
| 2019-01-12 | 44 | 478 | 33.7 | 22.5 | 42 | 10.9 | 27 | 0 | 17.4 | moderado | 1 |
| 2019-01-13 | 38 | 290 | 33.5 | 21.7 | 42 | 7.6 | 21.2 | 0 | 16.4 | moderado | 1 |
| 2019-01-14 | 13 | 60 | 32.9 | 21.4 | 43 | 8.9 | 23 | 0 | 17.4 | moderado | 1 |
| 2019-01-15 | 7 | 47 | 32.9 | 21.4 | 42 | 8.9 | 24.1 | 0 | 17.8 | moderado | 1 |
| 2019-01-16 | 3 | 5 | 32.6 | 20.1 | 46 | 14.1 | 31.3 | 0 | 21 | moderado | 1 |
| 2019-01-17 | 9 | 22 | 32.1 | 21.8 | 48 | 18.7 | 42.8 | 0 | 23.6 | alto | 1 |
| 2019-01-18 | 3 | 7 | 31.4 | 21.3 | 48 | 16.6 | 34.6 | 0 | 22.4 | alto | 1 |
| 2019-01-19 | 13 | 192 | 32.9 | 21 | 45 | 12.5 | 25.9 | 0 | 20.6 | moderado | 1 |
| 2019-01-20 | 1 | 6 | 33.2 | 21.4 | 43 | 7.9 | 22.3 | 0 | 18.6 | moderado | 1 |
| 2019-01-21 | 6 | 15 | 32.3 | 22.4 | 47 | 17.2 | 37.1 | 0 | 24.2 | alto | 1 |
| 2019-01-22 | 1 | 0 | 32.1 | 21.1 | 46 | 17.8 | 36.7 | 0 | 25 | alto | 1 |
| 2019-01-23 | 0 | 0 | 31.2 | 19.8 | 43 | 14.3 | 31.3 | 0 | 23.3 | alto | 1 |
| 2019-01-24 | 1 | 2 | 31.6 | 17.6 | 38 | 9 | 22 | 0 | 20.6 | moderado | 1 |
| 2019-01-25 | 0 | 0 | 31.9 | 16.9 | 37 | 8.9 | 22.3 | 0 | 21.1 | moderado | 0 |
| 2019-01-26 | 0 | 0 | 30.8 | 18 | 39 | 17.5 | 38.2 | 0 | 26.8 | alto | 0 |
| 2019-01-27 | 0 | 0 | 30.9 | 19 | 43 | 16.5 | 36 | 0 | 26.5 | alto | 0 |
| 2019-01-28 | 0 | 0 | 31.5 | 18.2 | 42 | 10.2 | 26.3 | 0 | 22.9 | alto | 0 |
| 2019-01-29 | 0 | 0 | 32.6 | 18.9 | 41 | 9.4 | 28.1 | 0 | 22.8 | alto | 0 |
| 2019-01-30 | 0 | 0 | 32.8 | 21.4 | 44 | 12.6 | 30.6 | 0 | 25.1 | alto | 0 |
| 2019-01-31 | 0 | 0 | 32.5 | 21.5 | 45 | 10.1 | 20.9 | 0 | 23.8 | alto | 0 |
| 2019-02-01 | 0 | 0 | 32.9 | 21 | 42 | 12.9 | 26.3 | 0 | 26 | alto | 0 |
| 2019-02-02 | 0 | 0 | 33.7 | 21 | 41 | 10.1 | 22.7 | 0.3 | 24.5 | alto | 0 |
| 2019-02-03 | 0 | 0 | 34.3 | 22.8 | 43 | 6.4 | 22.3 | 0 | 22.6 | alto | 0 |
It is generated in your browser from this page’s data: one file per fire, aggregated by day and without individual hotspots.
Live widget for your story
It updates itself while the fire is still active and links to this page. Free, with the attribution shown at the bottom.
Sources for this page: GWIS (Copernicus), NASA FIRMS (VIIRS), ERA5 (ECMWF/Copernicus C3S) · Open-Meteo.com (CC BY 4.0), GHSL (JRC). Open-Meteo.com · How we build fire pages: methodology
- Burnt area
- 3,270ha
- GWIS perimeter (Copernicus)
- Duration
- 24days
- 1 Jan 2019 – 24 Jan 2019
- Municipalities hit
- 1
- districts
- Started on
- 1 Jan
- 2019
- Heat detections
- 227
- in a single hotspot: 157 MW
- Danger at start
- 12
- Moderate · FWI index
- Average daily power
- 89MW
- detected power per day, on average
Where it burned
HOTSPOTS BY DAY
1 Jan24 Jan
24 Jan 2019
How it evolved, day by day
1 Jan
7 Jan
12 Jan
16 Jan
20 Jan
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
43km/h · peak gust
38%lowest humidity
It had gone 2 days without rain (1 mm or more) when it started.
This area had burned before
67% of the perimeter overlaps earlier fires recorded since 2016: 1,488 ha in 2016, 710 ha in 2017, 1,008 ha in 2018. Part of it burned more than once, so the yearly figures add up to more than the 2,181 ha that had burned before.
How big is it?
London boundary: geoBoundaries · Office for National Statistics (Open Government Licence v3.0).
Paris boundary: geoBoundaries · Institut national de l'information géographique et forestière (IGN-F) (Etalab Open License 2.0).
Madrid boundary: geoBoundaries · Open Data ESRI, IGN Central Registry of Cartography Area (CC BY 4.0).
Berlin boundary: geoBoundaries · Federal Agency for Cartography and Geodesy (dl-de/by-2-0).
This compares size, not location: both shapes are at the same scale, north up, centred on each other.
What happened to each town
-
Choam Ksant where it started3,289 ha reached on 1 Jan0.9 %
Burnt area inside each municipality, from crossing the GWIS perimeter with administrative boundaries. The distance runs from the point marking the centre of each area to the nearest fire: staying a kilometre away does not mean it reached the houses.
People and buildings inside the perimeter
GHSL 2020Built-up area< 0.1 ha
Residents< 20
Inside the perimeter there was no noticeable built-up land and almost nobody lived there (GHSL 2020, satellite-based estimate).
This is an estimate on 100 m cells, made from satellite imagery and census data: it does not mean that homes burned or that anyone was harmed. The perimeter also contains land that never burned.
Source: Global Human Settlement Layer (GHS-BUILT-S and GHS-POP R2023A), European Commission Joint Research Centre (JRC), © European Union, CC BY 4.0. Sum inside the perimeter computed by WorldFires. human-settlement.emergency.copernicus.eu
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 Jan | 29.1 °C | 54 % | 43 km/h | 0.0 mm | Moderate 12 |
| 2 Jan | 29.1 °C | 51 % | 43 km/h | 0.0 mm | Moderate 13 |
| 3 Jan | 29.3 °C | 54 % | 39 km/h | 0.0 mm | Moderate 12 |
| 4 Jan | 30.6 °C | 53 % | 34 km/h | 0.0 mm | Moderate 12 |
| 5 Jan | 32.2 °C | 52 % | 36 km/h | 0.0 mm | Moderate 12 |
| 6 Jan | 33.4 °C | 50 % | 37 km/h | 0.0 mm | Moderate 12 |
| 7 Jan | 33.4 °C | 42 % | 31 km/h | 0.0 mm | Moderate 15 |
| 8 Jan | 33.7 °C | 42 % | 33 km/h | 0.0 mm | Moderate 16 |
| 9 Jan | 33.0 °C | 44 % | 28 km/h | 0.0 mm | Moderate 16 |
| 10 Jan | 33.0 °C | 46 % | 31 km/h | 0.0 mm | Moderate 17 |
| 11 Jan | 33.9 °C | 41 % | 29 km/h | 0.0 mm | Moderate 17 |
| 12 Jan | 33.7 °C | 42 % | 27 km/h | 0.0 mm | Moderate 17 |
| 13 Jan | 33.5 °C | 42 % | 21 km/h | 0.0 mm | Moderate 16 |
| 14 Jan | 32.9 °C | 43 % | 23 km/h | 0.0 mm | Moderate 17 |
| 15 Jan | 32.9 °C | 42 % | 24 km/h | 0.0 mm | Moderate 18 |
| 16 Jan | 32.6 °C | 46 % | 31 km/h | 0.0 mm | Moderate 21 |
| 17 Jan | 32.1 °C | 48 % | 43 km/h | 0.0 mm | High 24 |
| 18 Jan | 31.4 °C | 48 % | 35 km/h | 0.0 mm | High 22 |
| 19 Jan | 32.9 °C | 45 % | 26 km/h | 0.0 mm | Moderate 21 |
| 20 Jan | 33.2 °C | 43 % | 22 km/h | 0.0 mm | Moderate 19 |
| 21 Jan | 32.3 °C | 47 % | 37 km/h | 0.0 mm | High 24 |
| 22 Jan | 32.1 °C | 46 % | 37 km/h | 0.0 mm | High 25 |
| 23 Jan | 31.2 °C | 43 % | 31 km/h | 0.0 mm | High 23 |
| 24 Jan | 31.6 °C | 38 % | 22 km/h | 0.0 mm | Moderate 21 |
| 25 Jan after | 31.9 °C | 37 % | 22 km/h | 0.0 mm | Moderate 21 |
| 26 Jan after | 30.8 °C | 39 % | 38 km/h | 0.0 mm | High 27 |
| 27 Jan after | 30.9 °C | 43 % | 36 km/h | 0.0 mm | High 26 |
| 28 Jan after | 31.5 °C | 42 % | 26 km/h | 0.0 mm | High 23 |
| 29 Jan after | 32.6 °C | 41 % | 28 km/h | 0.0 mm | High 23 |
| 30 Jan after | 32.8 °C | 44 % | 31 km/h | 0.0 mm | High 25 |
| 31 Jan after | 32.5 °C | 45 % | 21 km/h | 0.0 mm | High 24 |
| 1 Feb after | 32.9 °C | 42 % | 26 km/h | 0.0 mm | High 26 |
| 2 Feb after | 33.7 °C | 41 % | 23 km/h | 0.3 mm | High 24 |
| 3 Feb after | 34.3 °C | 43 % | 22 km/h | 0.0 mm | High 23 |
Its twins: fires that started in the same weather
It started with an FWI of 12.1, a minimum humidity of 54% and 2 days without rain. Fires in the area that started in weather like this since 2016: 19.
FWI at the start
12.1
Minimum humidity
54 %
Days without rain
2
this fire
chosen twins
rest of the area
Almost identicalSimilar
Outlines of the closest twins
This fire · Choam Ksant fire, 1 January 2019
3,270 ha
24 days
FWI 12.1
Min. humidity 54 %
Svay Leu fire, December 2020
2,397 ha
17 days
FWI 13.7
Min. humidity 51 %
51 km away, in 2020
First rain (1 mm or more) after it ended: none in the following ten days.
Sesan fire, January 2016
2,376 ha
14 days
FWI 9.0
Min. humidity 53 %
200 km away, in 2016
First rain (1 mm or more) after it ended: none in the following ten days.
Rovieng fire, February 2022
2,255 ha
9 days
FWI 15.5
Min. humidity 51 %
96 km away, in 2022
First rain (1 mm or more) after it ended: 1.7 mm on 14 Feb.
Kuleaen fire, February 2016
2,286 ha
14 days
FWI 14.3
Min. humidity 51 %
40 km away, in 2016
First rain (1 mm or more) after it ended: none in the following ten days.
Kuleaen fire, February 2016
3,145 ha
18 days
FWI 14.3
Min. humidity 51 %
40 km away, in 2016
First rain (1 mm or more) after it ended: none in the following ten days.
What happened to them
- 17 days
- median duration
- 2,798 ha
- median area
- 100 %
- went past 1,000 ha
- 2.5 mm
- rain at the end (median; 9 of 19 had it)
It burned an area similar to its twins (3,270 ha against a median of 2,798 ha) and lasted 24 days, against 17 days.
In 10 of 19, not even 1 mm fell in the ten days after the end: they went out without rain. In the rest, the first rainy day brought a median of 2.5 mm.
This is a bank of analogues: it shows what usually happens, not what will happen. With fewer than 15 twins we give no figures. How we calculate it
How it ended
—first rain
—no rain in ten days
43km/h · max. gust
It was considered over on 24 Jan, and not even 1 mm fell in the following ten days: it went out without rain. Twins with rain when they ended: 9 of 19, with a median of 2.5 mm.
Weather on this page: Open-Meteo.com (CC BY 4.0) · Copernicus Climate Change Service (ERA5)
How a twin is chosen
- Same area: fires that have already ended, less than 250 km from this one, since 2016.
- Same start: we compare the FWI on the first day, the minimum humidity that day and the run of days without rain before it. The slider sets how much they may differ.
- Only pages with final weather data (ERA5 reanalysis) calculated in the same way as this fire’s; agricultural and grass burns and pages with data under review are left out.
- Fires burning at the same time as this one (a week before or after) are left out: they share the same spell of weather and do not count as a precedent.
- They are sorted by similarity, and the outlines of the first five are drawn.
Before and after, from space
Drag the line to compare the same ground before the fire and after it.
↔
Before · 25 Dec 2018
After · 31 Jan 2019
Sentinel-2 did not pass over on that day. Try another date, or use false colour, which is daily.
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 · 227Every 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
Frequently asked questions
- How long did the Choam Ksant fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 1 January 2019 to 24 January 2019 (24 days). The perimeter dates it from 7 January 2019 to 17 January 2019.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 3,270 hectares (32.7 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Choam Ksant (3,289 ha, 0.9 %).
- What was the weather like?
- During the fire the temperature reached 33.9 °C, humidity dropped to 38 % and gusts hit 43 km/h. The fire danger index (FWI) reached 25, class High.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Cambodia (geoBoundaries). It is not an official report.
- How did the fires that started in similar weather in this area end?
- Fires less than 250 km away that started since 2016 with a similar FWI, humidity and dry spell: 19. Their median duration was 17 days and their median area 2,798 ha; 100 % went past 1,000 ha. In 10 of 19, not even 1 mm fell in the ten days after the end: they went out without rain. In the rest, the first rainy day brought a median of 2.5 mm.
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
History of this page · 2 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.
- Last day with fire: 17 January 2019 → 24 January 2019.
- Start date: 7 January 2019 → 1 January 2019.
RSS Changes to this page With cross-checks and a citable version
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
How we know this
- Perimeter: GWIS (Copernicus), rebuilt from heat detections rather than mapped on imagery.
- Dates adjusted with the VIIRS detections inside the perimeter, which said 7 January 2019 to 17 January 2019. 227 Suomi-NPP VIIRS detections on those dates.
- We have not matched this page with any official record.
- Weather: Copernicus ERA5 reanalysis at the fire location, in cells of about 25 km.
- Built-up area and population come from the JRC Global Human Settlement Layer (epoch 2020, 100 m cells), summed inside the perimeter: an estimate of what was there, not a damage count.
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 4.0 International (CC BY 4.0)). 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.