Solar flares on October 27, 2021
The most powerful solar flare in 24 hours
C8.5 (normal) flare - October 27 at 2:08 AM
Solar activity index
Value as of the end of the day on October 27, 2021
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from October 26, 2021 to October 27, 2021
Time zone — UTC-04 (Louisville) — summer time
List of solar flares for October 27, 2021
The total number of solar flares of class C and higher — 18 flares
C class — 18 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.2 | 21:32 | 21:38 | 21:45 | 2887 |
| C1.1 | 18:35 | 18:44 | 19:00 | 2887 |
| C1.6 | 18:07 | 18:22 | 18:27 | 2887 |
| C1.1 | 17:53 | 17:59 | 18:05 | — |
| C2.1 | 16:44 | 16:50 | 16:58 | 2891 |
| C2.1 | 14:48 | 14:58 | 15:04 | 2891 |
| C1.4 | 13:57 | 14:05 | 14:13 | 2891 |
| C2.1 | 12:21 | 12:36 | 12:44 | 2891 |
| C1.1 | 09:35 | 09:42 | 09:48 | 2887 |
| C2.3 | 08:11 | 08:19 | 08:25 | 2889 |
| C1.6 | 07:49 | 07:59 | 08:08 | 2889 |
| C1.5 | 06:14 | 06:29 | 06:36 | — |
| C2.8 | 05:50 | 05:54 | 05:59 | 2887 |
| C1.7 | 04:44 | 04:49 | 04:56 | — |
| C1.5 | 03:01 | 03:10 | 03:14 | 2887 |
| C8.5 | 01:47 | 02:08 | 02:19 | 2887 |
| C3.1 | 01:41 | 01:45 | 01:47 | 2887 |
| C2.8 | 01:22 | 01:35 | 01:41 | 2887 |