Solar flares on September 20, 2025
The most powerful solar flare in 24 hours
M1.5 (strong) flare - September 20 at 12:41 AM
Solar activity index
Value as of the end of the day on September 20, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 19, 2025 to September 20, 2025
Time zone — UTC+03 (Tambov)
List of solar flares for September 20, 2025
The total number of solar flares of class C and higher — 7 flares
C class — 6 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.4 | 22:57 | 23:11 | 23:34 | 4220 |
| C1.6 | 18:30 | 18:33 | 18:36 | 4220 |
| C1.3 | 11:41 | 11:48 | 11:59 | 4216 |
| C1.5 | 10:02 | 10:08 | 10:18 | 4216 |
| C2.6 | 07:34 | 07:52 | 08:21 | 4219 |
| M1.5 | 00:22 | 00:41 | 00:56 | 4216 |
| C5.8 | 23:49 | 00:12 | 00:20 | 4216 |