How long did the Kobyaysky Ulus fire last?

GWIS (Copernicus) dates it between 25 June 2017 and 20 July 2017: 26 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 147,024 hectares (1,470.2 km²). It is an estimate: official national figures may differ.

Which municipalities burned?

The fire entered 3 municipalities: Kobyaysky Ulus (97,680 ha, 0.9 %); Ust-Aldansky Ulus (44,530 ha, 2.4 %); Namsky Ulus (914 ha, 0.1 %).

What was the weather like?

During the fire the temperature reached 29.6 °C, humidity dropped to 21 % and gusts hit 58 km/h. The fire danger index (FWI) reached 31, class High.

Where does this data come from?

From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Russia (geoBoundaries). It is not an official report.

RU · Russia · 2017-06-25 → 2017-07-20

Kobyaysky Ulus fire, June 2017 Kobyaysky Ulus, Ust-Aldansky Ulus, Namsky Ulus

Out · last detection 20 Jul 2017, 17:12 UTC

The fire started on 25 June 2017 in Kobyaysky Ulus, Russia, and satellites saw it burning for 26 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 147,024 hectares from heat detections, spread across 3 municipalities.

This page is probably a fire complex, not a single fire. GWIS merges into one perimeter the fires that touch over weeks, which in large burning seasons can join dozens of separate fires. The total area is reliable; the origin and dates refer to the whole complex.

It is the 21th largest in Sakha Republic since 2016 (of 1422 with a page). Number 2 in Russia in 2017, of 369.

Burnt area: 147,024ha; GWIS perimeter (Copernicus)
Duration: 26days; 25 Jun 2017 – 20 Jul 2017
Municipalities hit: 3; districts
Started on: 25 Jun; 2017
Heat detections: 13,369; in a single hotspot: 485 MW
Danger at start: 16; Moderate · FWI index
Energy released: 132.8GW; sum of detected power

Play back 20 Jul 2017

HOTSPOTS BY DAY 25 Jun20 Jul

How it evolved, day by day

252627282930123457891011121314151617181920

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

The weather it burned in

30°high

58km/h · peak gust

21%lowest humidity

It had gone 0 days without rain (1 mm or more) when it started. Rain came after the fire: 1.9 mm on 23 Jul.

This area had burned before

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

What happened to each town

Kobyaysky Ulus where it started

97,680 ha reached on 25 Jun

0.9 %
Ust-Aldansky Ulus

44,530 ha reached on 25 Jun

2.4 %
Namsky Ulus

914 ha reached on 14 Jul

0.1 %

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)
25 Jun	25.3 °C	21 %	27 km/h	0.1 mm	Moderate 16
26 Jun	26.5 °C	23 %	20 km/h	0.0 mm	Moderate 20
27 Jun	27.5 °C	32 %	32 km/h	0.0 mm	High 22
28 Jun	29.6 °C	26 %	28 km/h	0.0 mm	High 26
29 Jun	28.4 °C	32 %	31 km/h	0.0 mm	High 25
30 Jun	28.4 °C	32 %	49 km/h	0.1 mm	High 30
1 Jul	29.3 °C	32 %	36 km/h	0.0 mm	High 27
2 Jul	25.6 °C	35 %	52 km/h	0.1 mm	High 31
3 Jul	24.1 °C	26 %	34 km/h	0.0 mm	High 27
4 Jul	20.2 °C	41 %	58 km/h	7.1 mm	Very low 4
5 Jul	22.4 °C	35 %	45 km/h	0.0 mm	Low 11
6 Jul	21.1 °C	44 %	28 km/h	1.0 mm	Low 7
7 Jul	25.2 °C	24 %	44 km/h	0.4 mm	High 23
8 Jul	21.2 °C	24 %	41 km/h	0.0 mm	High 25
9 Jul	22.9 °C	32 %	23 km/h	0.0 mm	Moderate 21
10 Jul	26.7 °C	32 %	48 km/h	0.0 mm	High 27
11 Jul	27.6 °C	39 %	48 km/h	0.0 mm	High 27
12 Jul	29.2 °C	41 %	30 km/h	0.0 mm	High 23
13 Jul	28.7 °C	46 %	34 km/h	0.4 mm	High 24
14 Jul	27.6 °C	38 %	35 km/h	0.0 mm	High 24
15 Jul	26.4 °C	37 %	32 km/h	0.0 mm	High 24
16 Jul	21.3 °C	53 %	30 km/h	5.2 mm	Very low 3
17 Jul	20.6 °C	65 %	26 km/h	4.7 mm	Very low 0
18 Jul	14.7 °C	63 %	26 km/h	10.4 mm	Very low 0
19 Jul	22.2 °C	28 %	40 km/h	0.0 mm	Very low 3
20 Jul	21.8 °C	43 %	23 km/h	4.9 mm	Very low 1
21 Jul after	13.6 °C	64 %	27 km/h	0.3 mm	Very low 2
22 Jul after	13.6 °C	59 %	23 km/h	0.8 mm	Very low 2
23 Jul after	18.2 °C	46 %	21 km/h	1.9 mm	Very low 2

Before and after, from space

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

↔

Before · 18 Jun 2017

After · 27 Jul 2017

Before After

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 · 13,369Every 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

All fires in Russia ›

Frequently asked questions

How long did the Kobyaysky Ulus fire last?: GWIS (Copernicus) dates it between 25 June 2017 and 20 July 2017: 26 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 147,024 hectares (1,470.2 km²). It is an estimate: official national figures may differ.
Which municipalities burned?: The fire entered 3 municipalities: Kobyaysky Ulus (97,680 ha, 0.9 %); Ust-Aldansky Ulus (44,530 ha, 2.4 %); Namsky Ulus (914 ha, 0.1 %).
What was the weather like?: During the fire the temperature reached 29.6 °C, humidity dropped to 21 % and gusts hit 58 km/h. The fire danger index (FWI) reached 31, class High.
Where does this data come from?: From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Russia (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: 112

Satellite cross-check

NASA FIRMS ↗
GWIS · Copernicus ↗

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?

Dates or duration Place or towns Burned area Name It was not a wildfire Same fire as another page Something else

What really happened?

Your connection to the fire (optional) Email (optional)

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 112.

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 (Open Data Commons Open Database License 1.0). 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.

Where it burned