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Anta fire, July 2023 Anta, Almirante Brown

Out · last detection 4 Aug 2023, 18:53 UTC

The fire started on 25 July 2023 in Anta, Argentina, and satellites saw it burning for 10 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 1,717 hectares from heat detections, spread across 2 municipalities.

It is the 182th largest in Salta since 2016 (of 231 with a page). Number 140 in Argentina in 2023, of 180.

Compare with…

Suggestions: Anta · 2016Anta · 2019Anta · 2019Anta · 2017

Burnt area
1,717ha
GWIS perimeter (Copernicus)
Duration
10days
25 Jul 2023 – 3 Aug 2023
Municipalities hit
2
departments
Started on
25 Jul
2023
Heat detections
107
in a single hotspot: 453 MW
Danger at start
27
High · FWI index
Average daily power
544MW
detected power per day, on average

Where it burned

HOTSPOTS BY DAY 25 Jul3 Aug
4 Aug 2023

How it evolved, day by day

28 Jul 2023 · 47 MW · 2 29 Jul 2023 · 259 MW · 7 30 Jul 2023 · 3,597 MW · 40 31 Jul 2023 · 236 MW · 22 1 Aug 2023 · 177 MW · 9 2 Aug 2023 · 12 MW · 2 3 Aug 2023 · 1 MW · 1 4 Aug 2023 · 21 MW · 3
28 Jul 30 Jul 1 Aug 3 Aug

Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.

The weather it burned in

38°high
62km/h · peak gust
16%lowest humidity

It had gone 12 days without rain (1 mm or more) when it started.

This area had burned before

30% of the perimeter overlaps earlier fires recorded since 2016: 109 ha in 2016, 2 ha in 2018, 305 ha in 2019, 189 ha in 2020. Part of it burned more than once, so the yearly figures add up to more than the 513 ha that had burned before.

How big is it?

10 km
It burned the equivalent of 1.1% of the area of London (17 km² against 1,583 km²).

London boundary: geoBoundaries · Office for National Statistics (Open Government Licence v3.0).

This compares size, not location: both shapes are at the same scale, north up, centred on each other.

What happened to each town

  1. Anta where it started
    1,401 ha reached on 20 Jul
    0.1 %
  2. Almirante Brown
    328 ha reached on 20 Jul
    0.0 %

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 2025
Built-up area< 0.1 ha
Residents< 20

Inside the perimeter there was no noticeable built-up land and almost nobody lived there (GHSL 2025, 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. The GHSL 2025 epoch is a projection made from 2020 and earlier data.

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)
25 Jul 19.5 °C 40 % 22 km/h 0.0 mm High 27
26 Jul 22.9 °C 36 % 42 km/h 0.0 mm High 34
27 Jul 21.3 °C 38 % 19 km/h 0.0 mm High 26
28 Jul 23.0 °C 29 % 28 km/h 0.0 mm High 28
29 Jul 27.0 °C 22 % 34 km/h 0.0 mm High 37
30 Jul 30.7 °C 26 % 44 km/h 0.0 mm Very high 42
31 Jul 33.9 °C 20 % 46 km/h 0.0 mm Extreme 51
1 Aug 37.3 °C 17 % 62 km/h 0.0 mm Extreme 69
2 Aug 37.8 °C 16 % 47 km/h 0.0 mm Extreme 59
3 Aug 30.3 °C 29 % 43 km/h 0.0 mm Very high 48
4 Aug after 29.4 °C 31 % 35 km/h 0.0 mm Very high 39
5 Aug after 32.8 °C 24 % 48 km/h 0.0 mm Very high 49
6 Aug after 35.1 °C 25 % 41 km/h 0.0 mm Very high 42
7 Aug after 24.1 °C 21 % 59 km/h 0.0 mm Extreme 59
8 Aug after 25.4 °C 28 % 32 km/h 0.0 mm High 38
9 Aug after 25.2 °C 29 % 28 km/h 0.0 mm High 36
10 Aug after 31.1 °C 34 % 37 km/h 0.0 mm High 38
11 Aug after 26.1 °C 41 % 41 km/h 0.0 mm High 37
12 Aug after 20.8 °C 20 % 33 km/h 0.0 mm High 38
13 Aug after 24.5 °C 16 % 35 km/h 0.0 mm Very high 41

Before and after, from space

Drag the line to compare the same ground before the fire and after it.

Before · 18 Jul 2023
After · 10 Aug 2023

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 · Copernicus

On 27 July 2023 the air beside the fire reached 15 µg/m³ of PM2.5, but no daily average passed the WHO guideline (15).

PM2.5 peak15 µg/m³
Days over the guideline0 days
PM1022 µg/m³
Optical depth0.34
232425262728293031123456
Good Fair Moderate Poor Very poor Extremely poor

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 · 107Every 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 timeSatelliteFRP (MW)LatLon

Other fires nearby

All fires in Argentina ›

Frequently asked questions

How long did the Anta fire last?
GWIS (Copernicus) dates it between 25 July 2023 and 3 August 2023: 10 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 1,717 hectares (17.2 km²). It is an estimate: official national figures may differ.
Which municipalities burned?
The fire entered 2 municipalities: Anta (1,401 ha, 0.1 %); Almirante Brown (328 ha, 0.0 %).
What was the weather like?
During the fire the temperature reached 37.8 °C, humidity dropped to 16 % and gusts hit 62 km/h. The fire danger index (FWI) reached 69, class Extreme.
Where does this data come from?
From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Argentina (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: 911 · 100 · Emergency number and official warnings ›

Satellite cross-check

History of this page Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.

No changes since 24 October 2026.

RSS Changes to this page

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
What do you think is wrong?

We will only use your email to reply about this report. Privacy. This is not an emergency service: if there is a fire now, call 911 · 100.

How we know this
  • Perimeter: GWIS (Copernicus), rebuilt from heat detections rather than mapped on imagery.
  • Dates from the perimeter: the VIIRS detections inside it did not change them. 107 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 2025, 100 m cells), summed inside the perimeter: an estimate of what was there, not a damage count.

How we build fire pages: methodology ›

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.