Burned area
satellite only1,152ha
Perimeter published by GWIS (Copernicus).
- Source
- GWIS (Copernicus)
- Date
- 23 Mar 2018 – 30 Mar 2018
+− cross-check
No official record is matched to this page to compare it with.
LR · Liberia · –
Voinjama fire, 23 March 2018 Voinjama, Zorzor
Out · last detection 30 Mar 2018, 14:16 UTC
The fire started on 23 March 2018 in Voinjama, Liberia, and satellites saw it burning for 8 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 1,152 hectares from heat detections, spread across 2 municipalities.
It is the 154th largest in Lofa since 2016 (of 202 with a page). Number 20 in Liberia in 2018, of 22.
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 only8days
23 Mar 2018 to 30 Mar 2018: first and last day with fire on the page.
- Source
- GWIS (Copernicus) · NASA FIRMS · VIIRS
- Date
- last detection: 30 Mar 2018, 14:16 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 only23 Mar 2018
First day with fire seen by the satellites or the perimeter.
- Source
- GWIS (Copernicus) · NASA FIRMS · VIIRS
- Date
- 23 Mar 2018
+− cross-check
No official record is matched to this page, so the alert time and the cause are not known here.
Hotspots
satellite only36
VIIRS detections at 375 m. Most intense hotspot: 58 MW.
- Source
- NASA FIRMS · VIIRS (Suomi NPP)
- Date
- 23 Mar 2018 – 30 Mar 2018
+− 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 only331MW
Total radiative power on 24 March 2018; hotspots that day: 20.
- Source
- NASA FIRMS · VIIRS (FRP)
- Date
- 24 Mar 2018
+− 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
model0.1FWI · very low
Fire Weather Index (Canadian system) computed by WorldFires for the day the fire started. Consecutive days without rain before: 0.
- Source
- WorldFires calculation (Canadian FWI system)
- Date
- 23 Mar 2018, 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
model32.4°C · 52% RH
High of 32.4 °C and minimum humidity of 52% on 28 March 2018; gusts of 30 km/h on 24 March 2018.
- Source
- weather model at the fire’s grid cell
- Date
- 23 Mar 2018 – 30 Mar 2018
- 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.
Living inside
model≈ 60people
Estimated residents inside the perimeter and 0.25 ha of built-up area (100 m grid, epoch 2020).
- Source
- GHSL R2023A · JRC
- Date
- calculated on 24 October 2026
+− cross-check
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.
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: 26 March 2018 → 30 March 2018.
-
· 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
- 1,152 ha
- Dates
- 23 Mar 2018 – 30 Mar 2018
- Name
- Voinjama
- Official record
- —
Versioned permanent link
https://worldfires.org/en/fire/voinjama-2018-03-5?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 voinjama-2018-03-5.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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2018-03-23 | 1 | 4 | 29.6 | 22 | 64 | 8.7 | 21.2 | 18.8 | 0.1 | muy_bajo | 1 |
| 2018-03-24 | 20 | 331 | 29.7 | 21.6 | 61 | 9.3 | 29.9 | 1.5 | 0.4 | muy_bajo | 1 |
| 2018-03-25 | 12 | 207 | 31.2 | 21.3 | 52 | 10.3 | 27.4 | 0.2 | 2 | muy_bajo | 1 |
| 2018-03-26 | 0 | 0 | 31.4 | 23.2 | 61 | 8.5 | 25.6 | 2.5 | 0.6 | muy_bajo | 1 |
| 2018-03-27 | 0 | 0 | 31.7 | 22 | 61 | 8.9 | 27.4 | 0.9 | 1 | muy_bajo | 1 |
| 2018-03-28 | 0 | 0 | 32.4 | 22.3 | 52 | 12.4 | 28.4 | 0 | 4.9 | muy_bajo | 1 |
| 2018-03-29 | 1 | 10 | 30.2 | 23.3 | 67 | 11 | 25.2 | 0.4 | 4.8 | muy_bajo | 1 |
| 2018-03-30 | 2 | 24 | 31.7 | 23.1 | 60 | 9.2 | 28.4 | 0 | 4.9 | muy_bajo | 1 |
| 2018-03-31 | 0 | 0 | 25.9 | 22.4 | 85 | 7.8 | 17.6 | 16.1 | 0 | muy_bajo | 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
- 1,152ha
- GWIS perimeter (Copernicus)
- Duration
- 8days
- 23 Mar 2018 – 30 Mar 2018
- Municipalities hit
- 2
- districts
- Started on
- 23 Mar
- 2018
- Heat detections
- 36
- in a single hotspot: 58 MW
- Danger at start
- 0
- Very low · FWI index
- Average daily power
- 115MW
- detected power per day, on average
Where it burned
HOTSPOTS BY DAY
23 Mar30 Mar
30 Mar 2018
How it evolved, day by day
23 Mar
24 Mar
25 Mar
29 Mar
30 Mar
Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.
The weather it burned in
32°high
30km/h · peak gust
52%lowest humidity
It had gone 0 days without rain (1 mm or more) when it started. Rain came after the fire: 16.1 mm on 31 Mar.
This area had burned before
No earlier perimeters overlap this fire since 2016, when the satellite record begins.
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
-
Voinjama where it started1,121 ha reached on 23 Mar0.6 %
-
38 ha0.0 %
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 area0.25 ha
Residents≈ 60
Inside the perimeter there were about 0.25 hectares of built-up land and about 60 residents (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) |
|---|---|---|---|---|---|
| 23 Mar | 29.6 °C | 64 % | 21 km/h | 18.8 mm | Very low 0 |
| 24 Mar | 29.7 °C | 61 % | 30 km/h | 1.5 mm | Very low 0 |
| 25 Mar | 31.2 °C | 52 % | 27 km/h | 0.2 mm | Very low 2 |
| 26 Mar | 31.4 °C | 61 % | 26 km/h | 2.5 mm | Very low 1 |
| 27 Mar | 31.7 °C | 61 % | 27 km/h | 0.9 mm | Very low 1 |
| 28 Mar | 32.4 °C | 52 % | 28 km/h | 0.0 mm | Very low 5 |
| 29 Mar | 30.2 °C | 67 % | 25 km/h | 0.4 mm | Very low 5 |
| 30 Mar | 31.7 °C | 60 % | 28 km/h | 0.0 mm | Very low 5 |
| 31 Mar after | 25.9 °C | 85 % | 18 km/h | 16.1 mm | Very low 0 |
Its twins: fires that started in the same weather
It started with an FWI of 0.1, a minimum humidity of 64% and rain the day before. Fires in the area that started in weather like this since 2016: 21.
FWI at the start
0.1
Minimum humidity
64 %
Days without rain
0
this fire
chosen twins
rest of the area
Almost identicalSimilar
Outlines of the closest twins
This fire · Voinjama fire, 23 March 2018
1,152 ha
8 days
FWI 0.1
Min. humidity 64 %
Zorzor fire, April 2016
1,050 ha
3 days
FWI 0.3
Min. humidity 64 %
55 km away, in 2016
First rain (1 mm or more) after it ended: 21.9 mm on 2 May.
Foya fire, April 2017
1,137 ha
4 days
FWI 0.5
Min. humidity 64 %
65 km away, in 2017
First rain (1 mm or more) after it ended: 5.4 mm on 9 Apr.
Kissi Tongi fire, April 2017
1,301 ha
5 days
FWI 0.5
Min. humidity 64 %
71 km away, in 2017
First rain (1 mm or more) after it ended: 1.7 mm on 10 Apr.
Kolahun fire, April 2019
1,369 ha
4 days
FWI 0.4
Min. humidity 64 %
73 km away, in 2019
First rain (1 mm or more) after it ended: 15.3 mm on 27 Apr.
Gounwolaila fire, April 2019
1,149 ha
2 days
FWI 0.5
Min. humidity 64 %
118 km away, in 2019
First rain (1 mm or more) after it ended: 2.0 mm on 25 Apr.
What happened to them
- 3 days
- median duration
- 1,301 ha
- median area
- 100 %
- went past 1,000 ha
- 2.9 mm
- rain at the end (median; 21 of 21 had it)
It burned an area similar to its twins (1,152 ha against a median of 1,301 ha) and lasted 8 days, against 3 days.
All of them had rain in the ten days after the end: the first rainy day brought a median of 2.9 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
16.1 mmfirst rain
31 Marthe day after it ended
30km/h · max. gust
It was considered over on 30 Mar, and on 31 Mar 16.1 mm fell. We do not know whether the rain or the firefighters put it out. Twins with rain when they ended: 21 of 21, with a median of 2.9 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 · 16 Mar 2018
After · 6 Apr 2018
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 · 36Every 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
- 7,276 haQuardu BoundiFebruary 2019 · 32 days · 20 km away
- 11,753 haQuardu Boundi4 March 2017 · 15 days · 22 km away
- 8,644 haVoinjama4 March 2022 · 13 days · 30 km away
- 7,494 haVoinjama23 February 2019 · 24 days · 32 km away
- 7,184 haVoinjama3 March 2017 · 15 days · 33 km away
- 10,169 haZorzor6 March 2026 · 16 days · 38 km away
Frequently asked questions
- How long did the Voinjama fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 23 March 2018 to 30 March 2018 (8 days). The perimeter dates it from 23 March 2018 to 26 March 2018.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 1,152 hectares (11.5 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire entered 2 municipalities: Voinjama (1,121 ha, 0.6 %); Zorzor (38 ha, 0.0 %).
- What was the weather like?
- During the fire the temperature reached 32.4 °C, humidity dropped to 52 % and gusts hit 30 km/h. The fire danger index (FWI) reached 5, class Very low.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Liberia (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: 21. Their median duration was 3 days and their median area 1,301 ha; 100 % went past 1,000 ha. All of them had rain in the ten days after the end: the first rainy day brought a median of 2.9 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 · 1 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.
- Last day with fire: 26 March 2018 → 30 March 2018.
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 23 March 2018 to 26 March 2018. 36 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 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.