Solar flares — Sep 28, 2025
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The strongest solar flare in the day
Flare of M6.4 level (strong) — in 09:43
Solar activity index
Value for Sep 28, 2025 24:00 (end on the day). The maximum value is 10.0
Solar flares in 2 days
Chart of solar activity from Sep 27, 2025 to Sep 28, 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 Sep 28, 2025
Total number of flares of class C and higher — 9 flares
C type — 8 | M type — 1 | X type — 0
| start | maximum | end | region | |
|---|---|---|---|---|
|
C3.6
|
15:35 | 15:40 | 15:48 | 4233 |
|
C9.9
|
14:26 | 14:31 | 14:34 | 4233 |
|
C9.0
|
14:12 | 14:24 | 14:26 | 4233 |
|
C3.2
|
13:46 | 13:55 | 14:03 | 4233 |
|
C3.6
|
12:29 | 12:42 | 12:55 | 4233 |
|
C3.0
|
11:48 | 11:54 | 11:56 | 4232 |
|
M6.4
|
09:34 | 09:43 | 09:49 | 4232 |
|
C2.3
|
08:02 | 08:07 | 08:25 | 4233 |
|
C2.8
|
01:52 | 02:01 | 02:10 | 4233 |