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Solar flares in May 2023
C-class316
M-class58
X-class0
LargestM9.62023-05-16
Sunspot number125.8NOAA SWPC
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| May 2022 | 243 | 20 | 2 | X1.5 |
| May 2023 | 316 | 58 | 0 | M9.6 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 2023-05-16 | 16:31 | 16:43 | 19 | M9.6 | – | – |
| 2023-05-20 | 12:25 | 12:35 | 14 | M8.9 | – | – |
| 2023-05-03 | 10:36 | 10:45 | 12 | M7.3 | – | – |
| 2023-05-01 | 13:02 | 13:09 | 9 | M7.2 | – | – |
| 2023-05-09 | 03:42 | 03:54 | 22 | M6.5 | – | – |
| 2023-05-20 | 07:16 | 07:32 | 19 | M6.4 | – | – |
| 2023-05-20 | 14:54 | 15:00 | 9 | M5.6 | – | – |
| 2023-05-19 | 00:41 | 00:48 | 12 | M5.3 | – | – |
| 2023-05-20 | 22:52 | 23:06 | 28 | M5.1 | – | – |
| 2023-05-09 | 20:32 | 20:52 | 31 | M5.0 | – | – |
| 2023-05-18 | 20:51 | 21:05 | 24 | M4.5 | – | – |
| 2023-05-03 | 09:15 | 09:27 | 17 | M4.3 | – | – |
| 2023-05-09 | 18:20 | 18:58 | 63 | M4.2 | – | – |
| 2023-05-31 | 22:14 | 22:52 | 57 | M4.2 | – | – |
| 2023-05-04 | 08:05 | 08:44 | 62 | M3.9 | – | – |
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
374 flares of class C or larger in May 2023; by M/X count it ranks 26 of 565 months.