Solar flares on October 18, 2001
The most powerful solar flare in 24 hours
C8.5 (normal) flare - October 18 at 10:05 PM
Solar activity index
Value as of the end of the day on October 18, 2001
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from October 17, 2001 to October 18, 2001
Time zone — UTC+03 (Riga)
List of solar flares for October 18, 2001
The total number of solar flares of class C and higher — 8 flares
C class — 8 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C8.5 | 21:58 | 22:05 | 22:11 | 9672 |
| C4.7 | 19:06 | 19:12 | 19:20 | 9661 |
| C6.5 | 16:46 | 16:49 | 16:52 | 9658 |
| C3.1 | 11:31 | 11:36 | 11:40 | — |
| C3.1 | 08:29 | 08:33 | 08:35 | — |
| C2.3 | 07:23 | 07:26 | 07:29 | — |
| C2.3 | 06:02 | 06:15 | 06:29 | — |
| C2.7 | 04:55 | 04:58 | 05:00 | — |