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X2.2 solar flare on 2011-02-15
ClassX2.2NOAA report
Peak01:562011-02-15 UTC
Duration22 min
Peak flux2.2e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 181 / 491 |
| Rank in year | 2 / 1319 |
| Other M/X flares that day | 0 |
| M/X flares that month | 14 |
| Solar cycle | Cycle 24 |
| Active region | AR 11158 (62 flares) |
Compared with the strongest flares of 2011
X6.9
X2.2
X2.1
X1.9
X1.9
X1.8
X1.5
X1.4
M9.3
M9.3
M7.4
M7.1
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.
← M6.6 2011-02-13M6.6 2011-02-18 →
About this page
A X2.2 flare that began 2011-02-15 01:44 UTC; No. 2 of 1,319 C-class-or-larger flares in 2011.