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Solar flares in September 2024
C-class149
M-class55
X-class2
LargestX4.42024-09-14
Sunspot number148.0NOAA SWPC
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| September 2023 | 244 | 34 | 0 | M8.7 |
| September 2024 | 149 | 55 | 2 | X4.4 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 2024-09-14 | 15:13 | 15:29 | 33 | X4.4 | – | – |
| 2024-09-12 | 09:31 | 09:43 | 19 | X1.2 | – | – |
| 2024-09-30 | 23:37 | 23:59 | 45 | M7.6 | – | – |
| 2024-09-12 | 14:31 | 14:43 | 15 | M6.8 | – | – |
| 2024-09-01 | 11:41 | 13:22 | – | M5.5 | – | – |
| 2024-09-01 | 13:28 | 13:31 | 6 | M5.5 | – | – |
| 2024-09-13 | 06:38 | 06:56 | – | M5.4 | – | – |
| 2024-09-11 | 23:49 | 00:12 | 42 | M5.0 | – | – |
| 2024-09-22 | 21:12 | 21:39 | 52 | M3.7 | – | – |
| 2024-09-03 | 15:51 | 16:02 | – | M3.3 | – | – |
| 2024-09-14 | 07:26 | 07:41 | 26 | M3.0 | – | – |
| 2024-09-02 | 13:33 | 13:43 | 19 | M2.9 | – | – |
| 2024-09-03 | 16:08 | 16:13 | 10 | M2.9 | – | – |
| 2024-09-05 | 08:47 | 08:56 | 13 | M2.8 | – | – |
| 2024-09-12 | 06:04 | 06:18 | 24 | M2.7 | – | – |
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
206 flares of class C or larger in September 2024; by M/X count it ranks 28 of 565 months.