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M8.1 solar flare on 2025-12-06
ClassM8.1GOES-18 science data
Peak20:392025-12-06 UTC
Duration20 min
Peak flux8.1e-05W/m²
| Comparison | Value |
|---|---|
| Rank in year | 24 / 3004 |
| Other M/X flares that day | 1 |
| M/X flares that month | 34 |
| Solar cycle | Cycle 25 |
Compared with the strongest flares of 2025
X5.1
X4.0
X2.4
X1.9
X1.9
X1.8
X1.8
X1.7
X1.7
X1.2
X1.2
X1.2
Other M/X flares that day
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 18:58 | 19:21 | 38 | M1.1 | – | – |
All times UTC. Until June 2017 classes are NOAA's reports of the time (GOES-15 and earlier included a 0.7 scaling factor); later classes come from calibrated GOES-16/18 data, so the same flare reads about 1.4× larger. Do not compare the two periods directly.
← M6.0 2025-12-04X1.1 2025-12-08 →
About this page
A M8.1 flare that began 2025-12-06 20:29 UTC; No. 24 of 3,004 C-class-or-larger flares in 2025.