Fire near Séno (BF)

13.94°N, 0.02°E · first detected on 22 October at 13:46

What the satellites measured

This fire was tracked from 22 October at 13:46 to 22 October at 22:40, through 30 satellite detections. The detected extent reaches 448 ha.

Detected extent: 448 ha
Cumulative power: 435 MW
Peak power, one pixel: 45 MW
VIIRS and MODIS detections: 30

These four figures cover the polar orbits alone, the ones that measure an area. The pass table below also counts geostationary detections, more frequent but too coarse for geometry, and its power column sums a whole pass where the peak above is that of a single pixel.

“Detected extent” is not “burned area”: it is the union of the ground footprints of the satellite pixels, and a pixel counts in full (375 m for VIIRS, 1 km for MODIS) even when only a forest edge is burning. Compared with press figures it is in practice one and a half to three times the area reported. Detections taken at the edge of the scan swath, too coarse to measure anything at all, are excluded. These figures come from thermal detection and are not an official assessment: only the emergency services and the competent authorities are authoritative.

Replay how the fire spread

The map is framed on this fire's footprint and loads only its detections. The timeline below covers the period in which satellites saw it, from the first to the last detection, with twelve hours before and twenty-four after; the ticks on the bar mark the emergency services' announcements that fall within it. The cursor opens on the most powerful pass, and playback replays the whole fire in about thirty seconds. “1 h” shows what is burning within an hour of the chosen moment : the map then follows the power curve below and empties when it falls. “24 h” stacks twenty-four hours : a fire stays visible between two satellite passes, which come two to four times a day. Both are true, but they say different things.

How the radiative power evolved

One point per satellite pass: the sum of the fire radiative power measured over the fire. This is the curve that says whether the fire eased off or picked up again, which no cumulative figure shows. The window covers 3 days; beyond that, clustering would merge two successive fires in the same place.

Fire dynamics

Loading history…

Satellite passes in detail

Pass	Power summed over the pass	Detections	Sensor
22 October at 22:40	21 MW	2	Terra
22 October at 18:46	11 MW	1	Met12
22 October at 18:36	12 MW	1	Met12
22 October at 18:26	11 MW	1	Met12
22 October at 18:23	35 MW	1	Met10
22 October at 18:16	15 MW	1	Met12
22 October at 18:08	70 MW	2	Met10
22 October at 18:06	11 MW	1	Met12
22 October at 18:03	45 MW	1	Aqua
22 October at 17:56	10 MW	1	Met12
22 October at 17:53	83 MW	2	Met10
22 October at 17:46	26 MW	2	Met12
22 October at 17:38	75 MW	2	Met10
22 October at 17:36	10 MW	1	Met12
22 October at 17:26	30 MW	2	Met12
22 October at 17:23	71 MW	2	Met10
22 October at 17:16	46 MW	3	Met12
22 October at 17:08	71 MW	2	Met10
22 October at 17:06	71 MW	5	Met12
22 October at 16:56	85 MW	6	Met12
22 October at 16:53	80 MW	2	Met10
22 October at 16:46	60 MW	3	Met12
22 October at 16:38	252 MW	4	Met10
22 October at 16:36	105 MW	5	Met12
22 October at 16:26	182 MW	6	Met12
22 October at 16:23	330 MW	3	Met10
22 October at 16:16	276 MW	7	Met12
22 October at 16:08	126 MW	2	Met10
22 October at 16:06	110 MW	4	Met12
22 October at 15:59	158 MW	12	N20
22 October at 15:56	127 MW	4	Met12
22 October at 15:53	298 MW	4	Met10
22 October at 15:46	325 MW	7	Met12
22 October at 15:40	163 MW	12	N
22 October at 15:38	255 MW	3	Met10
22 October at 15:36	390 MW	8	Met12
22 October at 15:26	231 MW	7	Met12
22 October at 15:23	213 MW	2	Met10
22 October at 15:16	70 MW	3	Met12
22 October at 15:06	34 MW	2	Met12
22 October at 15:01	49 MW	3	N21
22 October at 14:56	45 MW	2	Met12
22 October at 14:46	79 MW	4	Met12
22 October at 14:36	107 MW	4	Met12
22 October at 14:26	35 MW	2	Met12
22 October at 14:16	133 MW	5	Met12
22 October at 14:06	88 MW	4	Met12
22 October at 13:56	131 MW	4	Met12
22 October at 13:46	43 MW	2	Met12

One other fire near Séno (BF)

Separate fires, apart in time or in space, not pieces of this one. A single municipality can have several over one summer, and a forest massif often covers more than a hundred square kilometres.

20 to 21 October1,056 ha

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