AURSEEAursee · notable fire
Fire near Yosemite Valley, California, United States, September 2026
Detected · VIIRS 375 m (S-NPP, NOAA-20, NOAA-21) · 37.638, -119.615 · first seen 20 September 2026, 19:55 UTC
7,315 MWpeak summed radiative power, 26 Sep
364detections on that day
9 kmwidest extent of the group
7days in the record
First detected 20 September 2026, 19:55 UTC, 14 km S of Yosemite Valley. Last detected 27 September 2026, 21:06 UTC. Named places of 1,000 people or more within 25 km had a combined population of 1,035 (GeoNames).
Day by day
Summed radiative power per UTC day, MW.
| Day (UTC) | MW | Detections | Extent km | Night |
|---|---|---|---|---|
| 2026-09-20 | 4,342 | 292 | 9 | 89% |
| 2026-09-22 | 4,852 | 345 | 7 | 57% |
| 2026-09-23 | 5,278 | 385 | 5 | 41% |
| 2026-09-24 | 5,326 | 282 | 6 | 48% |
| 2026-09-25 | 4,594 | 249 | 6 | 61% |
| 2026-09-26 | 7,315 | 364 | 8 | 73% |
| 2026-09-27 | 3,748 | 226 | 8 | 96% |
MW is fire radiative power summed over every detection grouped into the fire in a 24-hour window, across three satellites. Extent is the width of the group of detections, not a mapped perimeter. Night is the share of detections from the night pass. How these are measured.
Related
- Fire history of United StatesEvery year since 2012.
- Fires in United States nowToday's fires, updated every hour.
- All notable firesEvery fire above 5,000 MW since the record began.
Fire alerts by email
Free. Pick a town and we email you when satellites detect fire within 30 km of it.