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X1.4 solar flare on 2011-09-22
ClassX1.4NOAA report
Peak11:012011-09-22 UTC
Duration75 min
Peak flux1.4e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 296 / 491 |
| Rank in year | 8 / 1319 |
| Other M/X flares that day | 1 |
| M/X flares that month | 35 |
| Solar cycle | Cycle 24 |
| Active region | AR 11302 (52 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
Other M/X flares that day
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 09:53 | 10:00 | 16 | M1.1 | – | 11302 |
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.
← M6.7 2011-09-08X1.9 2011-09-24 →
About this page
A X1.4 flare that began 2011-09-22 10:29 UTC; No. 8 of 1,319 C-class-or-larger flares in 2011.