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X5.1 solar flare on 2025-11-11
ClassX5.1GOES-18 science data
Peak10:042025-11-11 UTC
Duration28 min
Peak flux5.1e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (since Jun 2017) | 8 / 108 |
| Rank in year | 1 / 3004 |
| Other M/X flares that day | 1 |
| M/X flares that month | 30 |
| 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 |
|---|---|---|---|---|---|---|
| 08:02 | 08:09 | 11 | M1.4 | – | – |
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.
← X1.2 2025-11-10X4.0 2025-11-14 →
About this page
A X5.1 flare that began 2025-11-11 09:49 UTC; No. 1 of 3,004 C-class-or-larger flares in 2025.