Solar flares — Dec 21, 2025
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The strongest solar flare in the day
Flare of M1.31 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 — 5 flares
C type — 4 | M type — 1 | X type — 0
| start | maximum | end | region | |
|---|---|---|---|---|
|
M1.31
|
18:16 | 18:27 | 18:36 | — |
|
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 |