Solar flares — Dec 21, 2025
The strongest solar flare in the day
Flare of M1.3 level (strong) — in 18:27
Solar activity index
Value for Dec 21, 2025 24:00 (end on the day). The maximum value is 10.0
Solar flares in 2 days
Chart of solar activity from Dec 20, 2025 to Dec 21, 2025
Time zone — UTC+00 (London)
This chart in PNG format — high resolution
API data: JSON or TXT
List of solar flares for Dec 21, 2025
Total number of flares of class C and higher — 14 flares
C type — 13 | M type — 1 | X type — 0
| start | maximum | end | region | |
|---|---|---|---|---|
|
C2.06
|
23:25 | 23:30 | 23:34 | — |
|
C2.30
|
22:29 | 22:34 | 22:37 | — |
|
C3.13
|
22:01 | 22:12 | 22:19 | — |
|
C6.29
|
20:52 | 21:01 | 21:07 | — |
|
C4.07
|
20:17 | 20:24 | 20:31 | — |
|
C6.1
|
19:51 | 20:00 | 20:03 | — |
|
C3.9
|
19:29 | 19:43 | 19:51 | 4316 |
|
M1.3
|
18:12 | 18:27 | 18:36 | 4316 |
|
C2.6
|
16:47 | 17:03 | 17:27 | 4316 |
|
C1.4
|
15:52 | 15:58 | 16:05 | 4316 |
|
C1.3
|
12:47 | 12:56 | 13:01 | 4315 |
|
C1.3
|
12:11 | 12:23 | 12:29 | 4317 |
|
C1.3
|
11:54 | 12:03 | 12:11 | 4316 |
|
C1.8
|
02:14 | 02:24 | 02:32 | 4317 |