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Solar flares in August 2025
C-class239
M-class41
X-class0
LargestM4.52025-08-25
Sunspot number133.7NOAA SWPC
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| August 2024 | 230 | 117 | 4 | X1.7 |
| August 2025 | 239 | 41 | 0 | M4.5 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 2025-08-25 | 05:01 | 05:24 | 39 | M4.5 | – | – |
| 2025-08-26 | 05:09 | 05:25 | 31 | M4.5 | – | – |
| 2025-08-05 | 15:46 | 15:53 | 12 | M4.4 | – | – |
| 2025-08-07 | 10:40 | 11:31 | 73 | M3.9 | – | – |
| 2025-08-26 | 00:22 | 00:30 | 13 | M3.3 | – | – |
| 2025-08-03 | 13:50 | 13:57 | 11 | M2.9 | – | – |
| 2025-08-08 | 03:29 | 03:53 | 32 | M2.8 | – | – |
| 2025-08-30 | 19:11 | 20:02 | 90 | M2.7 | – | – |
| 2025-08-07 | 02:25 | 02:32 | 19 | M2.2 | – | – |
| 2025-08-10 | 14:57 | 15:07 | 13 | M2.2 | – | – |
| 2025-08-04 | 04:52 | 04:57 | – | M2.0 | – | – |
| 2025-08-23 | 19:53 | 20:06 | 23 | M1.9 | – | – |
| 2025-08-12 | 01:18 | 01:23 | 9 | M1.8 | – | – |
| 2025-08-09 | 16:33 | 16:40 | 11 | M1.7 | – | – |
| 2025-08-10 | 02:46 | 03:12 | 56 | M1.7 | – | – |
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
280 flares of class C or larger in August 2025; by M/X count it ranks 64 of 565 months.