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Solar flares in October 2023
C-class183
M-class6
X-class0
LargestM2.52023-10-01
Sunspot number94.9NOAA SWPC
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| October 2022 | 180 | 19 | 1 | X1.0 |
| October 2023 | 183 | 6 | 0 | M2.5 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 2023-10-01 | 01:10 | 01:32 | 32 | M2.5 | – | – |
| 2023-10-10 | 12:08 | 12:17 | 20 | M2.3 | – | – |
| 2023-10-02 | 12:35 | 12:46 | 22 | M1.9 | – | – |
| 2023-10-07 | 17:57 | 18:06 | 12 | M1.7 | – | – |
| 2023-10-10 | 01:55 | 02:09 | 26 | M1.6 | – | – |
| 2023-10-26 | 22:47 | 23:24 | 92 | M1.4 | – | – |
| 2023-10-16 | 15:59 | 16:06 | 11 | C9.8 | – | – |
| 2023-10-12 | 03:07 | 03:47 | – | C9.7 | – | – |
| 2023-10-01 | 03:21 | 03:24 | 8 | C9.3 | – | – |
| 2023-10-09 | 18:52 | 19:11 | 35 | C9.2 | – | – |
| 2023-10-29 | 13:00 | 13:09 | 12 | C7.8 | – | – |
| 2023-10-09 | 11:28 | 11:43 | 28 | C7.6 | – | – |
| 2023-10-16 | 10:32 | 10:51 | – | C7.5 | – | – |
| 2023-10-11 | 09:29 | 09:37 | 17 | C7.2 | – | – |
| 2023-10-08 | 03:34 | 03:40 | 10 | C6.6 | – | – |
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
189 flares of class C or larger in October 2023; by M/X count it ranks 306 of 565 months.