Solar flares on October 18, 2001
The most powerful solar flare in 24 hours
C3.9 (normal) flare - October 18 at 2:51 AM
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+10:30 (Adelaide) — summer time
List of solar flares for October 18, 2001
The total number of solar flares of class C and higher — 7 flares
C class — 7 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.1 | 19:01 | 19:06 | 19:10 | — |
| C3.1 | 15:59 | 16:03 | 16:05 | — |
| C2.3 | 14:53 | 14:56 | 14:59 | — |
| C2.3 | 13:32 | 13:45 | 13:59 | — |
| C2.7 | 12:25 | 12:28 | 12:30 | — |
| C2.5 | 03:47 | 03:51 | 03:54 | 9661 |
| C3.9 | 02:43 | 02:51 | 03:04 | 9659 |