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Bayandun fire, June 2017 Bayandun

Out · last measured on 28 Jun 2017

The fire started on 24 June 2017 in Bayandun, Mongolia, and satellites saw it burning for 5 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 6,649 hectares from heat detections, spread across a single municipality.

It is the 6th largest in Dornod since 2016 (of 21 with a page). Number 4 in Mongolia in 2017, of 27.

We have the GWIS perimeter for this fire, but the VIIRS sensors did not capture it in enough detail: no day-by-day evolution, but the split by municipality is there.

Burnt area
6,649ha
GWIS perimeter (Copernicus)
Duration
5days
24 Jun 2017 – 28 Jun 2017
Municipalities hit
1
districts
Started on
24 Jun
2017
Danger at start
40
Very high · FWI index

Where it burned

The weather it burned in

36°high
41km/h · peak gust
11%lowest humidity

It had gone 5 days without rain (1 mm or more) when it started. Rain came after the fire: 20.3 mm on 7 Jul.

This area had burned before

No earlier perimeters overlap this fire since 2016, when the satellite record begins.

What happened to each town

  1. Bayandun where it started
    6,630 ha
    1.0 %

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)
24 Jun 32.7 °C 14 % 27 km/h 0.0 mm Very high 40
25 Jun 33.1 °C 16 % 36 km/h 0.1 mm Very high 47
26 Jun 35.2 °C 11 % 30 km/h 0.0 mm Very high 43
27 Jun 35.8 °C 13 % 38 km/h 0.0 mm Very high 48
28 Jun 33.3 °C 20 % 41 km/h 0.0 mm Extreme 54
29 Jun after 29.5 °C 24 % 34 km/h 0.0 mm Very high 43
30 Jun after 30.1 °C 22 % 26 km/h 0.0 mm Very high 39
1 Jul after 29.3 °C 23 % 35 km/h 0.0 mm Very high 45
2 Jul after 33.4 °C 19 % 36 km/h 0.0 mm Very high 46
3 Jul after 31.5 °C 19 % 47 km/h 0.1 mm Extreme 55
4 Jul after 33.3 °C 21 % 59 km/h 0.9 mm Extreme 58
5 Jul after 28.9 °C 22 % 44 km/h 0.0 mm Very high 47
6 Jul after 26.4 °C 27 % 49 km/h 0.0 mm Very high 49
7 Jul after 21.1 °C 40 % 36 km/h 20.3 mm Very low 3

Before and after, from space

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

Before · 17 Jun 2017
After · 5 Jul 2017

If the day is cloudy, change the date: each satellite passes once a day. In false colour the burnt ground looks brown or red.

Frequently asked questions

How long did the Bayandun fire last?
GWIS (Copernicus) dates it between 24 June 2017 and 28 June 2017: 5 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 6,649 hectares (66.5 km²). It is an estimate: official national figures may differ.
Which municipalities burned?
The fire only entered Bayandun (6,630 ha, 1.0 %).
What was the weather like?
During the fire the temperature reached 35.8 °C, humidity dropped to 11 % and gusts hit 41 km/h. The fire danger index (FWI) reached 54, class Extreme.
Where does this data come from?
From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Mongolia (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: 105 · 101

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
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 105 · 101.

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.