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X1.1 solar flare on 2026-06-30
ClassX1.1GOES-18 science data
Peak20:502026-06-30 UTC
Duration26 min
Peak flux1.1e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (since Jun 2017) | 96 / 108 |
| Rank in year | 11 / 1764 |
| Other M/X flares that day | 2 |
| M/X flares that month | 15 |
| 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 |
|---|---|---|---|---|---|---|
| 00:39 | 01:16 | 57 | M1.3 | – | – | |
| 12:37 | 12:57 | 46 | M5.8 | – | – |
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.
← M5.8 2026-06-30M8.5 2026-07-01 →
About this page
A X1.1 flare that began 2026-06-30 20:34 UTC; No. 11 of 1,764 C-class-or-larger flares in 2026.