Solar flares — Dec 13, 2025
The strongest solar flare in the day
Flare of C8.6 level (normal) — in 10:51
Solar activity index
Value for Dec 13, 2025 24:00 (end on the day). The maximum value is 10.0
Solar flares in 2 days
Chart of solar activity from Dec 12, 2025 to Dec 13, 2025
Time zone — UTC+01 (London) - summer time
This chart in PNG format — high resolution
API data: JSON or TXT
List of solar flares for Dec 13, 2025
Total number of flares of class C and higher — 9 flares
C type — 9 | M type — 0 | X type — 0
| start | maximum | end | region | |
|---|---|---|---|---|
|
C2.4
|
17:55 | 17:58 | 18:18 | 4304 |
|
C2.1
|
17:18 | 17:42 | 17:54 | — |
|
C2.8
|
13:01 | 13:04 | 13:30 | 4304 |
|
C8.6
|
10:36 | 10:51 | 11:02 | 4296 |
|
C1.5
|
07:41 | 07:48 | 07:53 | 4308 |
|
C1.6
|
04:11 | 04:21 | 04:27 | 4299 |
|
C1.6
|
03:56 | 03:59 | 04:02 | 4299 |
|
C1.2
|
02:51 | 02:59 | 03:14 | 4296 |
|
C1.1
|
02:04 | 02:11 | 02:17 | 4299 |