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Solar flares in January 2011
C-class18
M-class1
X-class0
LargestM1.32011-01-28
Sunspot number32.2NOAA SWPC
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| January 2010 | 28 | 6 | 0 | M3.4 |
| January 2011 | 18 | 1 | 0 | M1.3 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 2011-01-28 | 00:44 | 01:03 | 26 | M1.3 | – | 11149 |
| 2011-01-21 | 04:12 | 04:17 | 8 | C3.3 | – | 11149 |
| 2011-01-22 | 08:01 | 08:28 | 47 | C2.4 | – | 11149 |
| 2011-01-21 | 16:38 | 17:12 | 39 | C2.2 | – | 11149 |
| 2011-01-04 | 03:19 | 03:25 | 8 | C1.9 | – | 11141 |
| 2011-01-14 | 01:28 | 03:30 | 190 | C1.6 | – | – |
| 2011-01-27 | 19:50 | 20:03 | 29 | C1.5 | – | – |
| 2011-01-28 | 04:02 | 04:25 | 33 | C1.5 | – | 11149 |
| 2011-01-28 | 10:05 | 10:22 | 25 | C1.5 | – | 11149 |
| 2011-01-21 | 14:24 | 14:38 | 25 | C1.4 | – | 11149 |
| 2011-01-24 | 05:56 | 06:15 | 36 | C1.4 | – | 11149 |
| 2011-01-21 | 20:14 | 20:31 | 25 | C1.3 | – | 11149 |
| 2011-01-27 | 11:53 | 12:01 | 12 | C1.2 | – | 11149 |
| 2011-01-03 | 23:26 | 23:35 | 20 | C1.1 | – | 11142 |
| 2011-01-15 | 14:13 | 14:19 | 10 | C1.1 | – | – |
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.
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About this page
19 flares of class C or larger in January 2011; by M/X count it ranks 435 of 565 months.