Solar flares — Apr 21, 2004
The strongest solar flare in the day
Flare of C2.1 level (normal) — in 03:58
Solar activity index
Value for Apr 21, 2004 24:00 (end on the day). The maximum value is 10.0
Solar flares in 2 days
Chart of solar activity from Apr 20, 2004 to Apr 21, 2004
Time zone — UTC+01 (London) - summer time
This chart in PNG format — high resolution
API data: JSON or TXT
List of solar flares for Apr 21, 2004
Total number of flares of class C and higher — 2 flares
C type — 2 | M type — 0 | X type — 0
| start | maximum | end | region | |
|---|---|---|---|---|
|
C1.8
|
17:01 | 17:15 | 17:36 | 596 |
|
C2.1
|
03:40 | 03:58 | 04:21 | 596 |