Fire near Maranhão (BR)

9.55°S, 46.45°W · first detected on 22 October at 15:53

What the satellites measured

This fire was tracked from 22 October at 15:53 to 22 October at 21:15, through 41 satellite detections. The detected extent reaches 1,169 ha.

Detected extent: 1,169 ha
Cumulative power: 1,625 MW
Peak power, one pixel: 201 MW
VIIRS and MODIS detections: 41

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
23 October at 01:10	22 MW	1	G19
23 October at 01:03	70 MW	3	Met12
23 October at 00:56	19 MW	1	G19FRP
23 October at 00:50	110 MW	2	Met10
22 October at 23:23	13 MW	1	Met12
22 October at 23:20	39 MW	1	Met10
22 October at 23:16	25 MW	1	G19FRP
22 October at 23:13	13 MW	1	Met12
22 October at 23:06	21 MW	1	G19FRP
22 October at 23:05	35 MW	1	Met10
22 October at 22:50	28 MW	1	Met10
22 October at 22:46	35 MW	1	G19FRP
22 October at 22:43	35 MW	1	Met12
22 October at 22:40	44 MW	1	G19
22 October at 22:36	165 MW	2	G19FRP
22 October at 22:35	283 MW	3	Met10
22 October at 22:33	195 MW	4	Met12
22 October at 22:26	97 MW	2	G19FRP
22 October at 22:20	65 MW	1	G19
22 October at 22:03	45 MW	1	Met12
22 October at 21:53	237 MW	4	Met12
22 October at 21:46	535 MW	4	G19FRP
22 October at 21:43	841 MW	11	Met12
22 October at 21:40	218 MW	1	G19
22 October at 21:36	103 MW	1	G19FRP
22 October at 21:33	353 MW	7	Met12
22 October at 21:30	124 MW	1	G19
22 October at 21:26	192 MW	2	G19FRP
22 October at 21:23	207 MW	4	Met12
22 October at 21:20	169 MW	1	Met10
22 October at 21:20	258 MW	2	G19
22 October at 21:15	264 MW	3	Aqua
22 October at 21:13	346 MW	6	Met12
22 October at 21:03	92 MW	3	Met12
22 October at 20:40	380 MW	3	G19
22 October at 20:26	138 MW	1	G19FRP
22 October at 20:16	201 MW	1	G19FRP
22 October at 20:10	329 MW	2	G19
22 October at 20:03	210 MW	3	Met12
22 October at 19:23	318 MW	3	Met12
22 October at 19:20	263 MW	2	G19
22 October at 19:16	808 MW	3	G19FRP
22 October at 19:15	174 MW	9	N20
22 October at 19:13	962 MW	5	Met12
22 October at 19:10	552 MW	3	G19
22 October at 19:03	89 MW	2	Met12
22 October at 18:56	482 MW	13	N
22 October at 18:56	359 MW	2	G19FRP
22 October at 18:53	1,265 MW	7	Met12
22 October at 18:46	343 MW	2	G19FRP
22 October at 18:43	1,378 MW	6	Met12
22 October at 18:40	478 MW	4	G19
22 October at 18:36	216 MW	1	G19FRP
22 October at 18:33	403 MW	6	Met12
22 October at 18:30	91 MW	1	G19
22 October at 18:26	364 MW	2	G19FRP
22 October at 18:23	32 MW	1	Met12
22 October at 18:20	644 MW	4	G19
22 October at 18:20	705 MW	16	N21
22 October at 18:16	868 MW	4	G19FRP
22 October at 18:10	1,044 MW	4	G19
22 October at 18:06	1,116 MW	4	G19FRP
22 October at 18:03	31 MW	1	Met12
22 October at 18:00	837 MW	3	G19
22 October at 17:53	290 MW	2	Met12
22 October at 17:46	171 MW	2	G19FRP
22 October at 17:43	229 MW	3	Met12
22 October at 17:40	208 MW	2	G19
22 October at 17:36	586 MW	4	G19FRP
22 October at 17:35	396 MW	2	Met10
22 October at 17:33	163 MW	3	Met12
22 October at 17:23	189 MW	3	Met12
22 October at 17:20	572 MW	3	Met10
22 October at 17:13	236 MW	4	Met12
22 October at 17:05	163 MW	2	Met10
22 October at 17:03	211 MW	3	Met12
22 October at 16:53	73 MW	1	Met12
22 October at 16:50	496 MW	3	Met10
22 October at 16:46	542 MW	2	G19FRP
22 October at 16:43	1,571 MW	9	Met12
22 October at 16:36	348 MW	2	G19FRP
22 October at 16:35	1,134 MW	3	Met10
22 October at 16:33	1,463 MW	9	Met12
22 October at 16:26	196 MW	2	G19FRP
22 October at 16:23	414 MW	5	Met12
22 October at 16:20	241 MW	2	Met10
22 October at 16:13	21 MW	1	Met12
22 October at 16:06	88 MW	1	G19FRP
22 October at 16:05	200 MW	2	Met10
22 October at 16:03	257 MW	4	Met12
22 October at 15:53	65 MW	3	Met12

8 other fires near Maranhão (BR)

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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