Solar flares on October 4, 2002
The most powerful solar flare in 24 hours
M4.0 (strong) flare - October 4 at 8:38 AM
Solar activity index
Value as of the end of the day on October 4, 2002
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from October 3, 2002 to October 4, 2002
Time zone — UTC+03 (Elista)
List of solar flares for October 4, 2002
The total number of solar flares of class C and higher — 10 flares
C class — 7 | M class — 3 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.2 | 15:00 | 15:03 | 15:07 | — |
| M3.5 | 13:54 | 14:05 | 14:09 | 137 |
| C6.2 | 13:19 | 13:31 | 13:46 | 139 |
| C8.0 | 11:56 | 12:11 | 12:18 | 137 |
| C2.0 | 11:42 | 11:46 | 11:48 | 139 |
| M4.0 | 08:34 | 08:38 | 08:41 | 137 |
| C5.3 | 07:57 | 08:01 | 08:03 | — |
| C4.1 | 07:17 | 07:31 | 07:55 | 137 |
| C7.0 | 04:51 | 04:55 | 04:57 | — |
| M1.0 | 03:39 | 03:43 | 03:53 | 137 |