Solar flares on October 27, 2001
The most powerful solar flare in 24 hours
C9.1 (normal) flare - October 27 at 5:52 PM
Solar activity index
Value as of the end of the day on October 27, 2001
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from October 26, 2001 to October 27, 2001
Time zone — UTC-04 (Toronto) — summer time
List of solar flares for October 27, 2001
The total number of solar flares of class C and higher — 12 flares
C class — 12 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C5.9 | 22:30 | 22:44 | 22:46 | — |
| C3.4 | 20:10 | 20:14 | 20:19 | — |
| C9.1 | 17:44 | 17:52 | 18:00 | 9682 |
| C3.5 | 16:40 | 16:42 | 16:45 | 9678 |
| C3.5 | 15:30 | 15:45 | 16:00 | — |
| C4.2 | 14:41 | 14:46 | 14:51 | 9672 |
| C3.8 | 12:30 | 12:35 | 12:41 | 9678 |
| C7.2 | 11:20 | 11:28 | 11:34 | 9682 |
| C5.4 | 09:06 | 09:11 | 09:19 | — |
| C3.6 | 08:23 | 08:27 | 08:29 | 9672 |
| C4.3 | 05:28 | 05:31 | 05:35 | — |
| C6.3 | 04:05 | 04:21 | 04:58 | 9678 |