Solar flares — Apr 21, 2026
The strongest solar flare in the day
Flare of C5.3 level (normal) — in 07:02
Solar activity index
Value for Apr 21, 2026 24:00 (end on the day). The maximum value is 10.0
Solar flares in 2 days
Chart of solar activity from Apr 20, 2026 to Apr 21, 2026
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, 2026
Total number of flares of class C and higher — 12 flares
C type — 12 | M type — 0 | X type — 0
| start | maximum | end | region | |
|---|---|---|---|---|
|
C1.9
|
22:20 | 22:25 | 22:37 | 4420 |
|
C1.7
|
19:25 | 19:36 | 19:49 | 4420 |
|
C1.4
|
17:29 | 17:43 | 17:56 | 4420 |
|
C1.9
|
15:15 | 15:24 | 15:40 | 4420 |
|
C1.4
|
14:41 | 15:02 | 15:12 | 4420 |
|
C4.0
|
12:45 | 12:50 | 12:55 | 4420 |
|
C2.2
|
12:25 | 12:30 | 12:42 | 4420 |
|
C1.6
|
10:42 | 10:56 | 11:06 | 4420 |
|
C1.8
|
08:00 | 08:19 | 08:38 | — |
|
C1.4
|
07:47 | 07:55 | 08:00 | 4420 |
|
C5.3
|
06:53 | 07:02 | 07:08 | 4421 |
|
C1.3
|
02:03 | 02:15 | 02:24 | — |