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X1.0 solar flare on 2026-06-03
ClassX1.0GOES-18 science data
Peak11:282026-06-03 UTC
Duration16 min
Peak flux1.0e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (since Jun 2017) | 108 / 108 |
| Rank in year | 13 / 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
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.
← M7.7 2026-06-03M6.8 2026-06-21 →
About this page
A X1.0 flare that began 2026-06-03 11:19 UTC; No. 13 of 1,764 C-class-or-larger flares in 2026.