Solar flares — Sep 18, 2025
The strongest solar flare in the day
Flare of C3.6 level (normal) — in 16:41
Solar activity index
Value for Sep 18, 2025 24:00 (end on the day). The maximum value is 10.0
Solar flares in 2 days
Chart of solar activity from Sep 17, 2025 to Sep 18, 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 18, 2025
Total number of flares of class C and higher — 7 flares
C type — 7 | M type — 0 | X type — 0
| start | maximum | end | region | |
|---|---|---|---|---|
|
C2.96
|
23:29 | 23:41 | 23:56 | — |
|
C2.0
|
23:03 | 23:10 | 23:13 | 4220 |
|
C1.4
|
22:08 | 22:14 | 22:18 | 4220 |
|
C3.6
|
16:34 | 16:41 | 16:46 | 4220 |
|
C1.8
|
15:39 | 15:47 | 15:57 | 4020 |
|
C1.7
|
02:34 | 02:38 | 02:40 | 4220 |
|
C2.8
|
00:55 | 01:04 | 01:13 | — |