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Solar flares in September 2026
C-class60
M-class3
X-class0
LargestM3.02026-09-02
Sunspot number68.7NOAA SWPC
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| September 2025 | 174 | 15 | 0 | M3.6 |
| September 2026 | 60 | 3 | 0 | M3.0 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 2026-09-02 | 18:57 | 19:20 | 51 | M3.0 | – | – |
| 2026-09-04 | 07:45 | 07:53 | 15 | M1.2 | – | – |
| 2026-09-05 | 15:04 | 15:18 | 23 | M1.0 | – | – |
| 2026-09-30 | 02:30 | 02:46 | 35 | C8.6 | – | – |
| 2026-09-05 | 17:31 | 17:46 | 22 | C8.5 | – | – |
| 2026-09-03 | 16:14 | 16:30 | 28 | C7.7 | – | – |
| 2026-09-04 | 11:11 | 11:19 | 18 | C7.1 | – | – |
| 2026-09-03 | 14:36 | 14:46 | 16 | C6.9 | – | – |
| 2026-09-04 | 19:02 | 19:30 | 39 | C6.7 | – | – |
| 2026-09-05 | 10:24 | 10:45 | 32 | C6.4 | – | – |
| 2026-09-12 | 17:09 | 17:20 | 15 | C5.8 | – | – |
| 2026-09-01 | 21:03 | 21:10 | 9 | C5.7 | – | – |
| 2026-09-06 | 10:30 | 10:42 | 18 | C5.0 | – | – |
| 2026-09-03 | 11:52 | 11:59 | 13 | C4.2 | – | – |
| 2026-09-03 | 19:55 | 20:03 | 22 | C3.7 | – | – |
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
63 flares of class C or larger in September 2026; by M/X count it ranks 371 of 565 months.