Solar flares on September 15, 2025
The most powerful solar flare in 24 hours
C3.5 (normal) flare - September 15 at 9:31 PM
Solar activity index
Value as of the end of the day on September 15, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 14, 2025 to September 15, 2025
Time zone — UTC+03 (Riga)
List of solar flares for September 15, 2025
The total number of solar flares of class C and higher — 7 flares
C class — 7 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.5 | 21:23 | 21:31 | 21:46 | 4213 |
| C1.6 | 16:10 | 16:17 | 16:22 | 4213 |
| C1.4 | 14:32 | 14:39 | 14:45 | 4213 |
| C2.1 | 12:52 | 12:55 | 13:00 | 4216 |
| C2.1 | 11:14 | 11:21 | 11:28 | 4217 |
| C1.6 | 10:02 | 10:09 | 10:21 | 4217 |
| C1.7 | 04:30 | 04:38 | 04:48 | 4217 |