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Solar flares in February 2011
C-class111
M-class13
X-class1
LargestX2.22011-02-15
Sunspot number53.5NOAA SWPC
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| February 2010 | 44 | 9 | 0 | M8.3 |
| February 2011 | 111 | 13 | 1 | X2.2 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 2011-02-15 | 01:44 | 01:56 | 22 | X2.2 | – | 11158 |
| 2011-02-13 | 17:28 | 17:38 | 19 | M6.6 | – | 11158 |
| 2011-02-18 | 09:55 | 10:11 | 20 | M6.6 | – | 11158 |
| 2011-02-24 | 07:23 | 07:35 | 19 | M3.5 | – | 11163 |
| 2011-02-14 | 17:20 | 17:26 | 12 | M2.2 | – | 11158 |
| 2011-02-09 | 01:23 | 01:31 | 12 | M1.9 | – | 11153 |
| 2011-02-16 | 14:19 | 14:25 | 10 | M1.6 | – | 11158 |
| 2011-02-18 | 12:59 | 13:03 | 7 | M1.4 | – | 11158 |
| 2011-02-18 | 20:56 | 21:04 | 18 | M1.3 | – | 11162 |
| 2011-02-16 | 07:35 | 07:44 | 20 | M1.1 | – | 11161 |
| 2011-02-28 | 12:38 | 12:52 | 25 | M1.1 | – | 11164 |
| 2011-02-16 | 01:32 | 01:39 | 14 | M1.0 | – | – |
| 2011-02-18 | 10:23 | 10:26 | 14 | M1.0 | – | 11162 |
| 2011-02-18 | 14:00 | 14:08 | 15 | M1.0 | – | 11162 |
| 2011-02-16 | 09:02 | 09:11 | 17 | C9.9 | – | 11158 |
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.
About this page
125 flares of class C or larger in February 2011; by M/X count it ranks 197 of 565 months.