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X8.1 solar flare on 2026-02-01
ClassX8.1GOES-18 science data
Peak23:572026-02-01 UTC
Duration20 min
Peak flux8.1e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (since Jun 2017) | 5 / 108 |
| Rank in year | 1 / 1764 |
| Other M/X flares that day | 18 |
| M/X flares that month | 84 |
| Solar cycle | Cycle 25 |
Compared with the strongest flares of 2026
X8.1
X4.2
X2.8
X2.5
X2.4
X1.9
X1.6
X1.5
X1.4
X1.2
X1.1
X1.0
Other M/X flares that day
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 01:52 | 02:05 | 20 | M1.7 | – | – | |
| 03:31 | 03:41 | 19 | M1.0 | – | – | |
| 04:08 | 04:20 | 27 | M1.9 | – | – | |
| 09:53 | 10:02 | 13 | M6.6 | – | – | |
| 10:28 | 10:42 | 22 | M2.4 | – | – | |
| 11:52 | 12:12 | 28 | M6.7 | – | – | |
| 12:25 | 12:33 | 12 | X1.0 | – | – | |
| 12:44 | 12:50 | 12 | M5.8 | – | – | |
| 14:18 | 14:25 | 11 | M1.5 | – | – | |
| 15:37 | 15:48 | – | M1.5 | – | – | |
| 15:57 | 16:05 | 19 | M5.1 | – | – | |
| 17:32 | 17:35 | 8 | M1.1 | – | – | |
| 17:43 | 17:58 | – | M2.5 | – | – | |
| 18:15 | 18:19 | 7 | M2.1 | – | – | |
| 18:48 | 18:56 | 14 | M1.9 | – | – | |
| 19:12 | 19:22 | 22 | M1.8 | – | – | |
| 20:20 | 20:30 | 19 | M2.2 | – | – | |
| 23:12 | 23:27 | – | M1.3 | – | – |
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.
← M5.1 2026-02-01X2.8 2026-02-02 →
About this page
A X8.1 flare that began 2026-02-01 23:44 UTC; No. 1 of 1,764 C-class-or-larger flares in 2026.