Solar flares on October 18, 2003
The most powerful solar flare in 24 hours
M1.9 (strong) flare - October 18 at 10:26 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-08 (Anchorage) — 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 — 8 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| M1.9 | 22:08 | 22:26 | 22:41 | 484 |
| C6.5 | 14:14 | 14:18 | 14:20 | 484 |
| C2.3 | 13:25 | 13:29 | 13:33 | 484 |
| C3.3 | 12:26 | 12:41 | 12:50 | 484 |
| C3.0 | 10:36 | 11:08 | 11:14 | 484 |
| C2.6 | 09:06 | 09:15 | 09:30 | 484 |
| C4.9 | 08:28 | 08:53 | 08:58 | 484 |
| C3.3 | 06:48 | 07:22 | 07:31 | 484 |
| C3.3 | 00:49 | 01:00 | 01:04 | 484 |