Solar flares on September 12, 2025
The most powerful solar flare in 24 hours
C1.4 (normal) flare - September 12 at 5:00 PM
Solar activity index
Value as of the end of the day on September 12, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 11, 2025 to September 12, 2025
Time zone — UTC-06 (Calgary) — summer time
List of solar flares for September 12, 2025
The total number of solar flares of class C and higher — 3 flares
C class — 3 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.1 | 23:03 | 23:09 | 23:19 | 4207 |
| C1.1 | 17:38 | 17:44 | 18:17 | 4213 |
| C1.4 | 16:49 | 17:00 | 17:12 | 4207 |