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X1.1 solar flare on 2025-03-28
ClassX1.1GOES-16 science data
Peak15:202025-03-28 UTC
Duration45 min
Peak flux1.1e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (since Jun 2017) | 91 / 108 |
| Rank in year | 14 / 3004 |
| Other M/X flares that day | 3 |
| M/X flares that month | 22 |
| 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 |
|---|---|---|---|---|---|---|
| 17:54 | 18:01 | 10 | M1.0 | – | – | |
| 19:14 | 19:26 | 23 | M1.1 | – | – | |
| 23:20 | 23:39 | 32 | M1.7 | – | – |
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.
← X1.9 2025-02-23M5.6 2025-04-01 →
About this page
A X1.1 flare that began 2025-03-28 14:57 UTC; No. 14 of 3,004 C-class-or-larger flares in 2025.