Solar flares on October 18, 2003
The most powerful solar flare in 24 hours
C6.5 (normal) flare - October 18 at 6:18 PM
Solar activity index
Value as of the end of the day on October 18, 2003
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from October 17, 2003 to October 18, 2003
Time zone — UTC-04 (Thunder bay) — summer time
List of solar flares for October 18, 2003
The total number of solar flares of class C and higher — 9 flares
C class — 9 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C6.5 | 18:14 | 18:18 | 18:20 | 484 |
| C2.3 | 17:25 | 17:29 | 17:33 | 484 |
| C3.3 | 16:26 | 16:41 | 16:50 | 484 |
| C3.0 | 14:36 | 15:08 | 15:14 | 484 |
| C2.6 | 13:06 | 13:15 | 13:30 | 484 |
| C4.9 | 12:28 | 12:53 | 12:58 | 484 |
| C3.3 | 10:48 | 11:22 | 11:31 | 484 |
| C3.3 | 04:49 | 05:00 | 05:04 | 484 |
| C2.0 | 01:31 | 01:38 | 01:40 | 484 |