Fire near Piauí (BR)
6.30°S, 42.43°W · first detected on 11 October at 18:26
What the satellites measured
This fire was tracked from 11 October at 18:26 to 22 October at 18:20, that is 11 days, through 140 satellite detections. The detected extent reaches 1,869 ha.
- Detected extent
- 1,869 ha
- Cumulative power
- 1,950 MW
- Peak power, one pixel
- 123 MW
- VIIRS and MODIS detections
- 140
- Estimated emissions
- 6.4 kt of carbon
- Carbon burnt in the 0.1 degree cells (about 10 km) around the fire, from 11 October 2026 to 22 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 13 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 18:20 | 4 MW | 1 | N21 |
| 22 October at 06:40 | 28 MW | 11 | N20 |
| 22 October at 06:19 | 22 MW | 6 | N |
| 22 October at 06:15 | 24 MW | 1 | G19FRP |
| 22 October at 05:54 | 68 MW | 2 | Met12 |
| 22 October at 05:50 | 141 MW | 2 | Met10 |
| 22 October at 05:42 | 4 MW | 1 | N21 |
| 22 October at 01:14 | 8 MW | 1 | Terra |
| 21 October at 21:24 | 12 MW | 1 | Met12 |
| 21 October at 21:00 | 35 MW | 1 | G19 |
| 21 October at 20:54 | 13 MW | 1 | Met12 |
| 21 October at 20:50 | 36 MW | 1 | G19 |
| 21 October at 20:50 | 39 MW | 1 | Met10 |
| 21 October at 20:44 | 49 MW | 2 | Met12 |
| 21 October at 20:40 | 40 MW | 1 | G19 |
| 21 October at 20:36 | 48 MW | 3 | Aqua |
| 21 October at 20:35 | 43 MW | 1 | Met10 |
| 21 October at 20:34 | 43 MW | 2 | Met12 |
| 21 October at 20:30 | 46 MW | 1 | G19 |
| 21 October at 20:24 | 17 MW | 1 | Met12 |
| 21 October at 20:14 | 51 MW | 2 | Met12 |
| 21 October at 20:10 | 60 MW | 1 | G19 |
| 21 October at 20:05 | 252 MW | 3 | Met10 |
| 21 October at 20:00 | 103 MW | 1 | G19 |
| 21 October at 19:55 | 123 MW | 1 | G19FRP |
| 21 October at 19:50 | 343 MW | 3 | Met10 |
| 21 October at 19:50 | 318 MW | 3 | G19 |
| 21 October at 19:45 | 105 MW | 1 | G19FRP |
| 21 October at 19:40 | 299 MW | 3 | G19 |
| 21 October at 19:35 | 100 MW | 1 | Met10 |
| 21 October at 19:34 | 31 MW | 1 | Met12 |
| 21 October at 19:30 | 102 MW | 1 | G19 |
| 21 October at 19:25 | 107 MW | 1 | G19FRP |
| 21 October at 19:24 | 92 MW | 2 | Met12 |
| 21 October at 19:20 | 232 MW | 2 | G19 |
| 21 October at 19:20 | 296 MW | 2 | Met10 |
| 21 October at 19:15 | 308 MW | 2 | G19FRP |
| 21 October at 19:15 | 284 MW | 10 | N |
| 21 October at 19:14 | 207 MW | 3 | Met12 |
| 21 October at 19:10 | 504 MW | 3 | G19 |
| 21 October at 19:05 | 203 MW | 1 | G19FRP |
| 21 October at 19:05 | 476 MW | 3 | Met10 |
| 21 October at 19:04 | 643 MW | 7 | Met12 |
| 21 October at 19:00 | 585 MW | 4 | G19 |
| 21 October at 18:54 | 81 MW | 2 | Met12 |
| 21 October at 18:50 | 278 MW | 3 | Met10 |
| 21 October at 18:50 | 218 MW | 2 | G19 |
| 21 October at 18:40 | 93 MW | 1 | G19 |
| 21 October at 18:37 | 94 MW | 12 | N21 |
| 21 October at 18:30 | 52 MW | 1 | G19 |
| 21 October at 18:20 | 84 MW | 1 | Met10 |
| 21 October at 18:10 | 73 MW | 1 | G19 |
| 21 October at 18:05 | 84 MW | 1 | Met10 |
| 21 October at 18:00 | 85 MW | 1 | G19 |
| 21 October at 17:56 | 52 MW | 6 | N20 |
| 21 October at 17:50 | 82 MW | 1 | Met10 |
| 21 October at 17:40 | 73 MW | 1 | G19 |
| 21 October at 17:35 | 61 MW | 1 | Met10 |
| 21 October at 17:30 | 82 MW | 1 | G19 |
| 21 October at 15:50 | 92 MW | 1 | Met10 |
| 20 October at 21:34 | 15 MW | 1 | Met12 |
| 19 October at 18:13 | 6 MW | 1 | N |
| 16 October at 19:09 | 89 MW | 8 | N |
| 15 October at 18:52 | 143 MW | 15 | N21 |
| 15 October at 18:07 | 48 MW | 1 | N20 |
| 15 October at 17:48 | 100 MW | 6 | N |
| 15 October at 06:14 | 6 MW | 4 | N21 |
| 15 October at 01:33 | 8 MW | 1 | Terra |
| 14 October at 19:09 | 131 MW | 6 | N21 |
| 14 October at 18:26 | 178 MW | 6 | N20 |
| 14 October at 18:05 | 75 MW | 5 | N |
| 14 October at 17:29 | 91 MW | 7 | N21 |
| 14 October at 13:19 | 8 MW | 1 | Terra |
| 14 October at 07:10 | 1 MW | 2 | N |
| 13 October at 20:28 | 86 MW | 2 | Aqua |
| 13 October at 18:45 | 288 MW | 5 | N20 |
| 13 October at 18:26 | 31 MW | 5 | N |
| 13 October at 17:48 | 20 MW | 5 | N21 |
| 12 October at 19:05 | 15 MW | 3 | N20 |
| 12 October at 18:07 | 74 MW | 5 | N21 |
| 11 October at 18:26 | 5 MW | 1 | N21 |
8 other fires near Piauí (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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