Solar flares on October 4, 2025
The most powerful solar flare in 24 hours
C5.5 (normal) flare - October 4 at 4:42 AM
Solar activity index
Value as of the end of the day on October 4, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from October 3, 2025 to October 4, 2025
Time zone — UTC+03 (Kyiv)
List of solar flares for October 4, 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 |
|---|---|---|---|---|
| C3.0 | 21:50 | 22:05 | 22:11 | 4230 |
| C2.7 | 21:37 | 21:45 | 21:50 | 4230 |
| C3.5 | 20:45 | 20:52 | 20:56 | 4241 |
| C3.5 | 07:55 | 08:02 | 08:09 | 4232 |
| C3.2 | 07:07 | 07:14 | 07:16 | 4242 |
| C4.7 | 06:10 | 06:22 | 06:31 | 4236 |
| C5.5 | 04:36 | 04:42 | 04:47 | 4242 |
| C2.7 | 03:49 | 03:54 | 03:58 | 4242 |
| C3.4 | 03:25 | 03:35 | 03:41 | 4242 |
| C3.0 | 00:05 | 00:14 | 00:20 | 4242 |