Fire near Betsiboka (MG)

16.79°S, 47.86°E · first detected on 6 October at 11:32

What the satellites measured

This fire was tracked from 6 October at 11:32 to 21 October at 12:45, that is 15 days, through 19 satellite detections. The detected extent reaches 308 ha.

Detected extent: 308 ha
Cumulative power: 118 MW
Peak power, one pixel: 20 MW
VIIRS and MODIS detections: 19
Estimated emissions: 4.2 kt of carbon; Carbon burnt in the 0.1 degree cells (about 10 km) around the fire, from 6 October 2026 to 20 October 2026. An order-of-magnitude estimate from GFAS (ECMWF, Copernicus CAMS): it also counts neighbouring fires in the same cell. Contains modified Copernicus Atmosphere Monitoring Service information (2026). Published data stop on 20 October 2026.

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 18 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
21 October at 10:52	34 MW	1	Met12
21 October at 10:42	61 MW	1	Met12
21 October at 10:02	83 MW	2	Met12
21 October at 09:52	12 MW	1	Met12
21 October at 09:42	20 MW	1	Met12
21 October at 01:01	13 MW	3	N21
21 October at 00:16	7 MW	5	N20
20 October at 23:55	2 MW	1	N
20 October at 23:21	1 MW	1	N21
20 October at 14:59	18 MW	1	Aqua
20 October at 13:12	20 MW	1	Met12
20 October at 13:06	33 MW	5	N20
20 October at 12:45	47 MW	6	N
20 October at 12:12	20 MW	1	Met12
20 October at 12:11	25 MW	2	N21
20 October at 10:32	22 MW	1	Met12
20 October at 07:42	13 MW	1	Met12
20 October at 00:33	2 MW	2	N20
20 October at 00:14	6 MW	5	N
19 October at 23:38	4 MW	4	N21
19 October at 17:34	16 MW	1	Met9
19 October at 17:19	18 MW	1	Met9
19 October at 17:04	19 MW	1	Met9
19 October at 17:02	14 MW	1	Met12
19 October at 16:52	10 MW	1	Met12
19 October at 16:49	19 MW	1	Met9
19 October at 16:42	12 MW	1	Met12
19 October at 14:32	55 MW	4	Met12
19 October at 13:42	52 MW	2	Met12
19 October at 13:32	44 MW	2	Met12
19 October at 13:23	4 MW	1	N20
19 October at 13:04	80 MW	12	N
19 October at 12:32	18 MW	1	Met12
19 October at 12:28	13 MW	1	N21
19 October at 11:43	9 MW	1	N20
19 October at 11:22	19 MW	1	Met12
19 October at 09:32	34 MW	2	Met12
19 October at 09:02	23 MW	1	Met12
19 October at 08:52	48 MW	1	Met12
19 October at 08:42	72 MW	2	Met12
19 October at 08:32	76 MW	2	Met12
19 October at 08:22	241 MW	4	Met12
19 October at 07:33	53 MW	1	Met9
19 October at 07:32	103 MW	3	Met12
19 October at 07:22	95 MW	4	Met12
19 October at 07:12	100 MW	3	Met12
19 October at 07:02	55 MW	2	Met12
19 October at 06:52	36 MW	2	Met12
14 October at 13:17	130 MW	4	N20
14 October at 12:58	25 MW	3	N
14 October at 12:21	17 MW	3	N21
8 October at 13:13	13 MW	3	N
8 October at 12:34	13 MW	2	N21
8 October at 11:49	4 MW	1	N20
7 October at 13:30	4 MW	1	N
7 October at 12:53	11 MW	1	N21
7 October at 12:11	20 MW	4	N20
7 October at 11:49	19 MW	3	N
6 October at 12:28	9 MW	2	N20

7 other fires near Betsiboka (MG)

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.

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