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Solar flares in September 2010
C-class9
M-class0
X-class0
LargestC3.32010-09-08
Sunspot number35.7NOAA SWPC
Flares per day (C and above)
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| September 2009 | 1 | 0 | 0 | C2.0 |
| September 2010 | 9 | 0 | 0 | C3.3 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 2010-09-08 | 23:05 | 23:33 | 65 | C3.3 | – | 11105 |
| 2010-09-06 | 14:54 | 14:59 | 7 | C2.5 | N19W59 | 11105 |
| 2010-09-20 | 19:34 | 19:45 | 15 | C2.1 | – | 11109 |
| 2010-09-28 | 22:05 | 22:11 | 10 | C2.0 | N19W31 | 11110 |
| 2010-09-28 | 09:38 | 09:48 | 19 | C1.7 | – | 11110 |
| 2010-09-21 | 07:38 | 07:53 | 31 | C1.4 | – | 11109 |
| 2010-09-17 | 01:17 | 01:22 | 8 | C1.3 | S31E70 | 11108 |
| 2010-09-20 | 20:59 | 21:03 | 6 | C1.2 | – | 11109 |
| 2010-09-20 | 22:19 | 22:25 | 8 | C1.0 | – | 11109 |
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
9 flares of class C or larger in September 2010; by M/X count it ranks 531 of 565 months.