Solar flares on October 28, 2021
The most powerful solar flare in 24 hours
X1.0 (very strong) flare - October 28 at 3:35 PM
Solar activity index
Value as of the end of the day on October 28, 2021
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from October 27, 2021 to October 28, 2021
Time zone — UTC+00
List of solar flares for October 28, 2021
The total number of solar flares of class C and higher — 12 flares
C class — 9 | M class — 2 | X class — 1
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.5 | 21:02 | 21:07 | 21:11 | 2891 |
| C3.1 | 19:34 | 19:45 | 20:03 | 2891 |
| C3.1 | 18:07 | 18:10 | 18:14 | 2891 |
| X1.0 | 15:17 | 15:35 | 15:48 | 2887 |
| C3.8 | 13:46 | 13:59 | 14:05 | 2887 |
| C3.3 | 13:15 | 13:21 | 13:25 | 2887 |
| C2.2 | 12:26 | 12:38 | 12:49 | 2891 |
| C1.2 | 12:09 | 12:17 | 12:27 | 2887 |
| M2.2 | 10:19 | 10:28 | 10:37 | 2887 |
| C1.1 | 09:56 | 10:00 | 10:05 | 2887 |
| M1.4 | 07:30 | 07:40 | 07:45 | 2887 |
| C1.2 | 01:32 | 01:38 | 01:45 | 2887 |