Solar flares on September 15, 2025
The most powerful solar flare in 24 hours
C3.5 (normal) flare - September 15 at 12:31 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-06 (Edmonton) — summer time
List of solar flares for September 15, 2025
The total number of solar flares of class C and higher — 10 flares
C class — 10 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.5 | 22:46 | 22:58 | 23:09 | 4217 |
| C1.8 | 20:54 | 21:04 | 21:09 | 4217 |
| C1.4 | 15:04 | 15:08 | 15:10 | 4217 |
| C1.3 | 14:54 | 15:01 | 15:04 | 4217 |
| C3.5 | 12:23 | 12:31 | 12:46 | 4213 |
| C1.6 | 07:10 | 07:17 | 07:22 | 4213 |
| C1.4 | 05:32 | 05:39 | 05:45 | 4213 |
| C2.1 | 03:52 | 03:55 | 04:00 | 4216 |
| C2.1 | 02:14 | 02:21 | 02:28 | 4217 |
| C1.6 | 01:02 | 01:09 | 01:21 | 4217 |