Solar flares on October 28, 2021
The most powerful solar flare in 24 hours
X1.0 (very strong) flare - October 28 at 11:35 AM
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-04 (Louisville) — summer time
List of solar flares for October 28, 2021
The total number of solar flares of class C and higher — 12 flares
C class — 8 | M class — 3 | X class — 1
| Class | begin | max | end | region |
|---|---|---|---|---|
| M1.5 | 22:22 | 22:42 | 22:53 | 2891 |
| C1.5 | 17:02 | 17:07 | 17:11 | 2891 |
| C3.1 | 15:34 | 15:45 | 16:03 | 2891 |
| C3.1 | 14:07 | 14:10 | 14:14 | 2891 |
| X1.0 | 11:17 | 11:35 | 11:48 | 2887 |
| C3.8 | 09:46 | 09:59 | 10:05 | 2887 |
| C3.3 | 09:15 | 09:21 | 09:25 | 2887 |
| C2.2 | 08:26 | 08:38 | 08:49 | 2891 |
| C1.2 | 08:09 | 08:17 | 08:27 | 2887 |
| M2.2 | 06:19 | 06:28 | 06:37 | 2887 |
| C1.1 | 05:56 | 06:00 | 06:05 | 2887 |
| M1.4 | 03:30 | 03:40 | 03:45 | 2887 |