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Yilan County fire, 31 October 2017 Yilan County

Out · last measured on 5 Nov 2017

The fire started on 31 October 2017 in Yilan County, China, and satellites saw it burning for 6 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 1,651 hectares from heat detections, spread across a single municipality.

It is the 799th largest in Heilongjiang Province since 2016 (of 1751 with a page). Number 108 in China in 2017, of 272.

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
1,651ha
GWIS perimeter (Copernicus)
Duration
6days
31 Oct 2017 – 5 Nov 2017
Municipalities hit
1
counties
Started on
31 Oct
2017
Danger at start
11
Moderate · FWI index

Where it burned

The weather it burned in

11°high
45km/h · peak gust
25%lowest humidity

It had gone 10 days without rain (1 mm or more) when it started. Rain came after the fire: 6.4 mm on 7 Nov.

This area had burned before

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

What happened to each town

  1. Yilan County where it started
    1,652 ha
    0.4 %

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)
31 Oct 10.6 °C 27 % 31 km/h 0.0 mm Moderate 11
1 Nov 9.1 °C 27 % 45 km/h 0.0 mm Moderate 14
2 Nov 4.8 °C 28 % 44 km/h 0.0 mm Moderate 14
3 Nov 1.9 °C 25 % 30 km/h 0.0 mm Moderate 11
4 Nov 1.6 °C 39 % 44 km/h 0.0 mm Moderate 12
5 Nov 10.4 °C 32 % 44 km/h 0.0 mm Moderate 13
6 Nov after 12.0 °C 51 % 49 km/h 0.0 mm Moderate 13
7 Nov after 2.1 °C 88 % 24 km/h 6.4 mm Very low 0

Before and after, from space

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

Before · 24 Oct 2017
After · 12 Nov 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.

Other fires nearby

All fires in China ›

Frequently asked questions

How long did the Yilan County fire last?
GWIS (Copernicus) dates it between 31 October 2017 and 5 November 2017: 6 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 1,651 hectares (16.5 km²). It is an estimate: official national figures may differ.
Which municipalities burned?
The fire only entered Yilan County (1,652 ha, 0.4 %).
What was the weather like?
During the fire the temperature reached 10.6 °C, humidity dropped to 25 % and gusts hit 45 km/h. The fire danger index (FWI) reached 14, class Moderate.
Where does this data come from?
From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of China (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: 119

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 119.

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 ADM3 (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.