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Solar flares in September 2009
C-class1
M-class0
X-class0
LargestC2.02009-09-25
Sunspot number6.7NOAA SWPC
Flares per day (C and above)
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 2009-09-25 | 00:47 | 01:02 | 29 | C2.0 | – | 11026 |
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
1 flares of class C or larger in September 2009; by M/X count it ranks 525 of 565 months.