How long did the Momsky Ulus fire last?

According to the heat detections seen by satellite inside the perimeter, it burned from 30 June 2018 to 14 July 2018 (15 days). The perimeter dates it from 1 July 2018 to 12 July 2018.

How much area did it burn?

The perimeter GWIS (Copernicus) rebuilt from heat detections is 5,482 hectares (54.8 km²). It is an estimate: official national figures may differ.

Which municipalities burned?

The fire only entered Momsky Ulus (5,411 ha, 0.0 %).

What was the weather like?

During the fire the temperature reached 30.4 °C, humidity dropped to 23 % and gusts hit 43 km/h. The fire danger index (FWI) reached 18, class Moderate.

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 · 2018-06-30 → 2018-07-14

Momsky Ulus fire, 30 June 2018 Momsky Ulus

Out · last detection 14 Jul 2018, 02:54 UTC

The fire started on 30 June 2018 in Momsky Ulus, Russia, and satellites saw it burning for 15 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 5,482 hectares from heat detections, spread across a single municipality.

It is the 869th largest in Sakha Republic since 2016 (of 1422 with a page). Number 271 in Russia in 2018, of 540.

Compare with…

Suggestions: Momsky Ulus · 2018 Momsky Ulus · 2020

Burnt area: 5,482ha; GWIS perimeter (Copernicus)
Duration: 15days; 30 Jun 2018 – 14 Jul 2018
Municipalities hit: 1; districts
Started on: 30 Jun; 2018
Heat detections: 570; in a single hotspot: 274 MW
Danger at start: 3; Very low · FWI index
Average daily power: 648MW; detected power per day, on average

HOTSPOTS BY DAY 30 Jun14 Jul

Play back 14 Jul 2018

How it evolved, day by day

30 Jun 3 Jul 5 Jul 7 Jul 9 Jul 12 Jul 14 Jul

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

43km/h · peak gust

23%lowest humidity

It had gone 0 days without rain (1 mm or more) when it started. Rain came after the fire: 6.6 mm on 13 Jul.

This area had burned before

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

How big is it?

It burned the equivalent of 3.5% of the area of London (55 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

Momsky Ulus where it started

5,411 ha reached on 30 Jun

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.

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	20.6 °C	31 %	33 km/h	0.4 mm	Very low 3
25 Jun	23.4 °C	32 %	15 km/h	0.0 mm	Low 7
26 Jun	17.6 °C	52 %	43 km/h	2.2 mm	Very low 2
27 Jun	9.4 °C	65 %	30 km/h	3.4 mm	Very low 0
28 Jun	14.0 °C	50 %	24 km/h	0.0 mm	Very low 1
29 Jun	15.1 °C	52 %	37 km/h	0.5 mm	Very low 2
30 Jun	13.9 °C	51 %	34 km/h	0.2 mm	Very low 4
1 Jul	18.8 °C	38 %	28 km/h	0.3 mm	Low 6
2 Jul	16.4 °C	51 %	28 km/h	3.0 mm	Very low 1
3 Jul	23.0 °C	39 %	23 km/h	0.0 mm	Very low 3
4 Jul	28.0 °C	25 %	17 km/h	0.0 mm	Low 10
5 Jul	30.0 °C	23 %	30 km/h	0.0 mm	Moderate 17
6 Jul	30.4 °C	30 %	25 km/h	0.0 mm	Moderate 17
7 Jul	29.6 °C	30 %	30 km/h	0.0 mm	Moderate 18
8 Jul	28.1 °C	47 %	17 km/h	0.1 mm	Moderate 13
9 Jul	28.7 °C	35 %	40 km/h	0.0 mm	Moderate 18
10 Jul	16.3 °C	87 %	29 km/h	1.2 mm	Very low 4
11 Jul	16.7 °C	69 %	28 km/h	0.3 mm	Very low 4
12 Jul	24.4 °C	55 %	36 km/h	4.8 mm	Very low 1
13 Jul	18.0 °C	68 %	39 km/h	6.6 mm	Very low 0

Before and after, from space

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

↔

Before · 23 Jun 2018

After · 21 Jul 2018

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 · 570Every 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 Momsky Ulus fire last?: According to the heat detections seen by satellite inside the perimeter, it burned from 30 June 2018 to 14 July 2018 (15 days). The perimeter dates it from 1 July 2018 to 12 July 2018.
How much area did it burn?: The perimeter GWIS (Copernicus) rebuilt from heat detections is 5,482 hectares (54.8 km²). It is an estimate: official national figures may differ.
Which municipalities burned?: The fire only entered Momsky Ulus (5,411 ha, 0.0 %).
What was the weather like?: During the fire the temperature reached 30.4 °C, humidity dropped to 23 % and gusts hit 43 km/h. The fire danger index (FWI) reached 18, class Moderate.
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 · Emergency number and official warnings ›

Satellite cross-check

NASA FIRMS ↗
GWIS · Copernicus ↗

History of this page · 2 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.

25 October 2026 Last day with fire: 12 July 2018 → 14 July 2018.
25 October 2026 Start date: 1 July 2018 → 30 June 2018.

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.

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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?

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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.

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 1 July 2018 to 12 July 2018. 570 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.

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 (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