Fire near Bahia (BR)

11.43°S, 43.43°W · first detected on 23 September at 01:58

What the satellites measured

This fire was tracked from 23 September at 01:58 to 17 October at 19:07, that is 25 days, through 4,142 satellite detections. The detected extent reaches 29,932 ha.

Detected extent: 29,932 ha
Cumulative power: 147,405 MW
Peak power, one pixel: 2,638 MW
VIIRS and MODIS detections: 4,142
Estimated emissions: 36.0 kt of carbon; Carbon burnt in the 0.1 degree cells (about 10 km) around the fire, from 5 October 2026 to 17 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).

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 27 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
17 October at 19:07	24 MW	1	N20
17 October at 18:11	14 MW	1	N21
16 October at 20:43	40 MW	1	Aqua
16 October at 19:28	10 MW	1	N20
16 October at 19:07	141 MW	10	N
16 October at 18:33	286 MW	16	N21
16 October at 17:48	103 MW	10	N20
15 October at 19:26	228 MW	23	N
15 October at 18:50	1,718 MW	77	N21
15 October at 18:05	2,206 MW	77	N20
15 October at 17:46	1,900 MW	50	N
15 October at 14:00	302 MW	4	Terra
15 October at 06:51	32 MW	12	N
15 October at 06:17	7 MW	2	N21
15 October at 05:32	4 MW	1	N20
15 October at 01:33	199 MW	10	Terra
14 October at 18:26	16 MW	2	N20
14 October at 18:05	214 MW	9	N
14 October at 07:12	18 MW	2	N
14 October at 06:34	20 MW	12	N21
14 October at 05:49	44 MW	13	N20
14 October at 05:32	8 MW	2	N
13 October at 20:26	47 MW	1	Aqua
13 October at 18:43	505 MW	18	N20
13 October at 18:24	1,442 MW	27	N
13 October at 17:48	281 MW	13	N21
13 October at 01:54	39 MW	3	Terra
12 October at 19:02	268 MW	13	N20
12 October at 18:05	933 MW	18	N21
12 October at 06:27	10 MW	8	N20
12 October at 06:08	9 MW	6	N
12 October at 05:32	12 MW	7	N21
12 October at 01:14	29 MW	2	Terra
11 October at 19:02	116 MW	8	N
11 October at 18:26	48 MW	2	N21
11 October at 17:39	112 MW	6	N20
11 October at 06:46	19 MW	6	N20
11 October at 06:27	33 MW	12	N
11 October at 05:49	36 MW	14	N21
11 October at 02:13	486 MW	4	Terra
10 October at 20:11	716 MW	4	Aqua
10 October at 19:20	403 MW	12	N
10 October at 18:43	349 MW	5	N21
10 October at 17:58	270 MW	8	N20
10 October at 07:06	8 MW	3	N20
10 October at 06:46	13 MW	7	N
10 October at 06:10	19 MW	8	N21
10 October at 05:25	12 MW	5	N20
10 October at 01:35	144 MW	5	Terra
9 October at 21:13	132 MW	2	Aqua
9 October at 19:02	162 MW	5	N21
9 October at 18:18	301 MW	5	N20
9 October at 17:58	324 MW	16	N
9 October at 07:04	12 MW	9	N
9 October at 06:27	14 MW	4	N21
9 October at 05:45	13 MW	6	N20
9 October at 00:57	52 MW	1	Terra
8 October at 20:34	490 MW	10	Aqua
8 October at 19:22	387 MW	9	N21
8 October at 18:37	193 MW	9	N20
8 October at 18:18	249 MW	9	N
8 October at 17:39	338 MW	10	N21
8 October at 06:46	5 MW	4	N21
8 October at 06:02	5 MW	2	N20
8 October at 05:45	6 MW	4	N
7 October at 18:56	180 MW	7	N20
7 October at 18:35	134 MW	4	N
7 October at 18:01	202 MW	5	N21
7 October at 06:21	4 MW	3	N20
7 October at 06:02	2 MW	1	N
7 October at 01:16	12 MW	1	Terra
6 October at 20:58	275 MW	5	Aqua
6 October at 19:15	253 MW	10	N20
6 October at 18:56	500 MW	7	N
6 October at 18:18	562 MW	5	N21
6 October at 06:19	2 MW	2	N
5 October at 20:19	33 MW	1	Aqua
5 October at 19:13	86 MW	6	N
5 October at 18:37	63 MW	4	N21
5 October at 17:54	37 MW	4	N20
4 October at 18:11	51 MW	6	N20
3 October at 05:55	28 MW	10	N20
3 October at 01:56	445 MW	5	Terra
2 October at 20:02	1,470 MW	5	Aqua
2 October at 18:50	616 MW	33	N20
2 October at 18:30	2,439 MW	75	N
2 October at 17:54	5,400 MW	93	N21
2 October at 13:45	2,085 MW	15	Terra
2 October at 06:59	109 MW	31	N21
2 October at 06:17	187 MW	78	N20
2 October at 05:55	195 MW	57	N
2 October at 05:19	160 MW	27	N21
2 October at 01:16	657 MW	26	Terra
1 October at 21:02	4,013 MW	34	Aqua
1 October at 19:07	8,314 MW	245	N20
1 October at 18:50	8,534 MW	209	N
1 October at 18:11	9,646 MW	137	N21
1 October at 13:04	135 MW	4	Terra
1 October at 08:48	11 MW	1	Aqua
1 October at 06:34	424 MW	89	N20
1 October at 06:14	529 MW	119	N
1 October at 05:38	605 MW	120	N21
1 October at 02:18	6,175 MW	13	Terra
30 September at 20:24	4,192 MW	42	Aqua
30 September at 19:28	7,163 MW	108	N20
30 September at 19:07	5,836 MW	145	N
30 September at 18:33	5,699 MW	105	N21
30 September at 17:46	2,923 MW	90	N20
30 September at 14:04	161 MW	3	Terra
30 September at 08:12	12 MW	1	Aqua
30 September at 06:53	123 MW	45	N20
30 September at 06:34	221 MW	68	N
30 September at 05:55	324 MW	67	N21
30 September at 01:37	443 MW	22	Terra
29 September at 21:23	1,107 MW	5	Aqua
29 September at 19:26	3,462 MW	93	N
29 September at 18:50	7,775 MW	120	N21
29 September at 18:05	6,048 MW	89	N20
29 September at 17:46	3,974 MW	80	N
29 September at 13:23	236 MW	8	Terra
29 September at 07:12	328 MW	70	N20
29 September at 06:51	352 MW	102	N
29 September at 06:17	691 MW	178	N21
29 September at 05:32	759 MW	129	N20
29 September at 00:59	11,649 MW	17	Terra
28 September at 20:47	1,899 MW	22	Aqua
28 September at 19:07	2,207 MW	46	N21
28 September at 18:24	1,232 MW	48	N20
28 September at 18:05	1,865 MW	75	N
28 September at 06:34	30 MW	12	N21
28 September at 05:49	37 MW	13	N20
28 September at 05:30	28 MW	8	N
28 September at 01:56	386 MW	7	Terra
27 September at 18:43	1,355 MW	23	N20
27 September at 18:24	978 MW	14	N
27 September at 17:48	293 MW	11	N21
27 September at 06:08	3 MW	1	N20
25 September at 06:27	6 MW	5	N
25 September at 05:49	8 MW	4	N21
25 September at 01:39	39 MW	5	Terra
24 September at 18:43	432 MW	20	N21
24 September at 18:01	315 MW	9	N20
24 September at 06:46	7 MW	4	N
24 September at 06:10	9 MW	6	N21
23 September at 20:53	563 MW	8	Aqua
23 September at 19:02	79 MW	9	N21
23 September at 18:18	122 MW	5	N20
23 September at 17:58	113 MW	9	N
23 September at 08:40	8 MW	1	Aqua
23 September at 07:04	13 MW	4	N
23 September at 06:27	30 MW	8	N21
23 September at 05:45	27 MW	9	N20
23 September at 01:58	49 MW	2	Terra
22 September at 20:17	182 MW	3	Aqua
22 September at 19:22	41 MW	5	N21
22 September at 18:37	86 MW	8	N20
22 September at 18:18	47 MW	5	N
22 September at 17:39	25 MW	3	N21
22 September at 06:46	6 MW	4	N21
22 September at 06:02	11 MW	5	N20
22 September at 01:20	28 MW	1	Terra
21 September at 21:15	79 MW	2	Aqua

8 other fires near Bahia (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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