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X1.9 solar flare on 2026-01-18
ClassX1.9GOES-18 science data
Peak18:092026-01-18 UTC
Duration84 min
Peak flux1.9e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (since Jun 2017) | 40 / 108 |
| Rank in year | 6 / 1764 |
| Other M/X flares that day | 0 |
| M/X flares that month | 8 |
| 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
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.
← M7.1 2025-12-31M6.6 2026-02-01 →
About this page
A X1.9 flare that began 2026-01-18 17:27 UTC; No. 6 of 1,764 C-class-or-larger flares in 2026.