Fire near Gwynedd (GB)
52.85°N, 3.99°W · first detected on 16 July at 03:37
What the satellites measured
This fire was tracked from 16 July at 03:37 to 24 July at 05:49, that is 8 days, through 396 satellite detections. The detected extent reaches 1,652 ha.
- Detected extent
- 1,652 ha
- Cumulative power
- 3,779 MW
- Peak power
- 162 MW
- Detections
- 396
“Detected extent” is not “burned area”: it is the union of the ground footprints of the satellite pixels, and a 375 m pixel counts in full 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 satellite detection and are not an official assessment: only the local fire and civil protection authorities are authoritative.
Replay how the fire spread
The map is centred on this fire and loads only its detections. The timeline below covers the whole fire, from the first satellite pass to the last. “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. “12 h” stacks twelve hours , as the home map does, where stacking avoids an empty screen between two satellite passes. 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 30 days; beyond that, clustering would merge two successive fires in the same place.
Fire dynamics
Loading history…
Satellite passes in detail
| Pass | Power | Detections | Sensor |
|---|---|---|---|
| 24 July at 05:49 | 1 MW | 2 | N |
| 24 July at 05:10 | 3 MW | 1 | N21 |
| 24 July at 04:26 | 4 MW | 4 | N20 |
| 24 July at 04:09 | 14 MW | 5 | N |
| 24 July at 03:32 | 8 MW | 5 | N21 |
| 23 July at 22:36 | 15 MW | 1 | Terra |
| 23 July at 16:16 | 17 MW | 1 | Aqua |
| 23 July at 14:34 | 39 MW | 3 | N20 |
| 23 July at 14:17 | 31 MW | 3 | N |
| 23 July at 13:40 | 15 MW | 2 | N21 |
| 23 July at 11:26 | 17 MW | 1 | Terra |
| 23 July at 05:30 | 4 MW | 2 | N21 |
| 23 July at 04:45 | 11 MW | 7 | N20 |
| 23 July at 04:26 | 12 MW | 6 | N |
| 23 July at 03:49 | 8 MW | 3 | N21 |
| 23 July at 03:05 | 8 MW | 3 | N20 |
| 22 July at 17:16 | 65 MW | 3 | Aqua |
| 22 July at 16:14 | 5 MW | 1 | N |
| 22 July at 15:38 | 5 MW | 1 | N21 |
| 22 July at 14:51 | 5 MW | 2 | N20 |
| 22 July at 04:11 | 1 MW | 1 | N21 |
| 22 July at 03:24 | 2 MW | 3 | N20 |
| 21 July at 16:40 | 100 MW | 3 | Aqua |
| 21 July at 16:33 | 11 MW | 2 | N |
| 21 July at 15:57 | 65 MW | 5 | N21 |
| 21 July at 15:12 | 113 MW | 8 | N20 |
| 21 July at 14:53 | 126 MW | 10 | N |
| 21 July at 14:19 | 174 MW | 11 | N21 |
| 21 July at 13:32 | 128 MW | 12 | N20 |
| 21 July at 11:47 | 45 MW | 3 | Terra |
| 21 July at 05:21 | 32 MW | 8 | N20 |
| 21 July at 05:04 | 41 MW | 8 | N |
| 21 July at 04:28 | 63 MW | 16 | N21 |
| 21 July at 03:41 | 53 MW | 8 | N20 |
| 21 July at 03:22 | 57 MW | 15 | N |
| 20 July at 22:19 | 142 MW | 6 | Terra |
| 20 July at 17:39 | 132 MW | 2 | Aqua |
| 20 July at 16:16 | 186 MW | 9 | N21 |
| 20 July at 16:01 | 224 MW | 2 | Aqua |
| 20 July at 15:29 | 179 MW | 10 | N20 |
| 20 July at 15:12 | 239 MW | 9 | N |
| 20 July at 14:36 | 116 MW | 7 | N21 |
| 20 July at 13:49 | 73 MW | 5 | N20 |
| 20 July at 13:32 | 122 MW | 5 | N |
| 20 July at 11:09 | 24 MW | 1 | Terra |
| 20 July at 05:42 | 3 MW | 3 | N20 |
| 20 July at 05:21 | 7 MW | 5 | N |
| 20 July at 04:45 | 4 MW | 2 | N21 |
| 20 July at 04:02 | 10 MW | 7 | N20 |
| 20 July at 03:41 | 7 MW | 4 | N |
| 20 July at 03:05 | 12 MW | 4 | N21 |
| 19 July at 17:01 | 7 MW | 1 | Aqua |
| 19 July at 05:42 | 7 MW | 4 | N |
| 19 July at 05:06 | 8 MW | 3 | N21 |
| 19 July at 04:19 | 6 MW | 6 | N20 |
| 19 July at 04:02 | 5 MW | 2 | N |
| 19 July at 03:26 | 1 MW | 1 | N21 |
| 18 July at 22:38 | 36 MW | 2 | Terra |
| 18 July at 16:08 | 78 MW | 3 | N20 |
| 18 July at 15:50 | 118 MW | 6 | N |
| 18 July at 15:14 | 97 MW | 7 | N21 |
| 18 July at 14:27 | 58 MW | 3 | N20 |
| 18 July at 14:08 | 24 MW | 2 | N |
| 18 July at 11:28 | 32 MW | 1 | Terra |
| 18 July at 06:00 | 1 MW | 1 | N |
| 18 July at 05:23 | 11 MW | 6 | N21 |
| 18 July at 04:38 | 24 MW | 9 | N20 |
| 18 July at 04:19 | 28 MW | 8 | N |
| 18 July at 03:43 | 61 MW | 10 | N21 |
| 17 July at 22:00 | 62 MW | 4 | Terra |
| 17 July at 17:24 | 47 MW | 2 | Aqua |
| 17 July at 16:08 | 9 MW | 2 | N |
| 17 July at 15:31 | 53 MW | 3 | N21 |
| 17 July at 14:46 | 41 MW | 5 | N20 |
| 17 July at 14:27 | 53 MW | 5 | N |
| 17 July at 13:51 | 46 MW | 3 | N21 |
| 17 July at 12:26 | 21 MW | 1 | Terra |
| 17 July at 05:45 | 3 MW | 3 | N21 |
| 17 July at 04:58 | 8 MW | 6 | N20 |
| 17 July at 04:38 | 9 MW | 8 | N |
| 17 July at 04:04 | 11 MW | 5 | N21 |
| 17 July at 03:15 | 8 MW | 4 | N20 |
| 16 July at 06:02 | 8 MW | 3 | N21 |
| 16 July at 05:15 | 7 MW | 4 | N20 |
| 16 July at 04:21 | 8 MW | 7 | N21 |
| 16 July at 03:37 | 5 MW | 6 | N20 |
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