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Solar flares in October 2025
C-class175
M-class34
X-class0
LargestM4.82025-10-15
Sunspot number107.1NOAA SWPC
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| October 2024 | 186 | 74 | 8 | X8.9 |
| October 2025 | 175 | 34 | 0 | M4.8 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 2025-10-15 | 03:49 | 04:15 | 47 | M4.8 | – | – |
| 2025-10-15 | 07:05 | 07:18 | 21 | M3.7 | – | – |
| 2025-10-14 | 20:28 | 20:36 | 17 | M3.1 | – | – |
| 2025-10-15 | 21:55 | 22:28 | 70 | M2.7 | – | – |
| 2025-10-15 | 23:37 | 23:45 | 15 | M2.4 | – | – |
| 2025-10-09 | 12:11 | 12:31 | 41 | M2.0 | – | – |
| 2025-10-14 | 00:35 | 00:41 | 9 | M2.0 | – | – |
| 2025-10-13 | 04:59 | 05:26 | 46 | M1.9 | – | – |
| 2025-10-14 | 12:38 | 12:47 | 18 | M1.9 | – | – |
| 2025-10-19 | 20:03 | 20:15 | 23 | M1.8 | – | – |
| 2025-10-03 | 05:00 | 05:23 | 42 | M1.5 | – | – |
| 2025-10-17 | 01:15 | 01:28 | 25 | M1.5 | – | – |
| 2025-10-18 | 10:37 | 10:51 | 22 | M1.5 | – | – |
| 2025-10-16 | 13:53 | 14:08 | 29 | M1.3 | – | – |
| 2025-10-17 | 16:14 | 16:32 | – | M1.3 | – | – |
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
209 flares of class C or larger in October 2025; by M/X count it ranks 95 of 565 months.