Solar flares on September 21, 2003
The most powerful solar flare in 24 hours
C2.3 (normal) flare - September 21 at 1:10 AM
Solar activity index
Value as of the end of the day on September 21, 2003
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 20, 2003 to September 21, 2003
Time zone — UTC+02 (Bratislava) — summer time
List of solar flares for September 21, 2003
The total number of solar flares of class C and higher — 5 flares
C class — 5 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.0 | 06:04 | 06:07 | 06:12 | — |
| C1.8 | 04:26 | 04:30 | 04:32 | 464 |
| C1.1 | 02:25 | 02:28 | 02:31 | 464 |
| C1.4 | 02:03 | 02:08 | 02:13 | 464 |
| C2.3 | 00:57 | 01:10 | 01:19 | 464 |