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Solar flares in December 2023
C-class297
M-class23
X-class2
LargestX4.92023-12-31
Sunspot number113.6NOAA SWPC
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| December 2022 | 272 | 44 | 0 | M6.3 |
| December 2023 | 297 | 23 | 2 | X4.9 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 2023-12-31 | 21:36 | 21:55 | 31 | X4.9 | – | – |
| 2023-12-14 | 16:47 | 17:02 | 24 | X2.8 | – | – |
| 2023-12-15 | 07:23 | 07:34 | 19 | M6.9 | – | – |
| 2023-12-15 | 07:03 | 07:15 | – | M6.3 | – | – |
| 2023-12-14 | 07:11 | 07:44 | 48 | M5.8 | – | – |
| 2023-12-08 | 22:56 | 23:07 | 17 | M5.5 | – | – |
| 2023-12-21 | 05:19 | 05:38 | 29 | M4.2 | – | – |
| 2023-12-21 | 23:42 | 00:04 | 36 | M3.3 | – | – |
| 2023-12-24 | 11:09 | 11:18 | 14 | M2.9 | – | – |
| 2023-12-24 | 16:37 | 16:49 | 18 | M2.6 | – | – |
| 2023-12-10 | 03:42 | 03:53 | 15 | M2.4 | – | – |
| 2023-12-06 | 21:26 | 21:44 | 28 | M2.3 | – | – |
| 2023-12-14 | 13:29 | 13:48 | 38 | M2.3 | – | – |
| 2023-12-06 | 05:30 | 05:41 | 21 | M2.1 | – | – |
| 2023-12-05 | 06:39 | 06:44 | 8 | M1.5 | – | – |
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
322 flares of class C or larger in December 2023; by M/X count it ranks 132 of 565 months.