Solar flares on September 21, 2003
The most powerful solar flare in 24 hours
C2.3 (normal) flare - September 21 at 4:40 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+05:30 (Shrirampur)
List of solar flares for September 21, 2003
The total number of solar flares of class C and higher — 6 flares
C class — 6 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.0 | 09:34 | 09:37 | 09:42 | — |
| C1.8 | 07:56 | 08:00 | 08:02 | 464 |
| C1.1 | 05:55 | 05:58 | 06:01 | 464 |
| C1.4 | 05:33 | 05:38 | 05:43 | 464 |
| C2.3 | 04:27 | 04:40 | 04:49 | 464 |
| C2.0 | 02:59 | 03:06 | 03:13 | — |