Solar flares — September 21, 2025
The strongest solar flare in the day
Flare of C3.4 level (normal) — in 01:41
Solar activity index
Value for Sep 21, 2025 24:00 (end on the day) . The maximum value is 10.0
Solar flares in 2 days
Chart of solar activity from Sep 20, 2025 to Sep 21, 2025
Time zone — UTC+05:30 (Tiruvottiyur)
This chart in PNG format — high resolution
API data: JSON or TXT
List of solar flares for Sep 21, 2025
Total number of flares of class C and higher – 10 flares
C type — 10 | M type — 0 | X type — 0
| start | maximum | end | region | |
|---|---|---|---|---|
|
C3.3
|
23:03 | 23:13 | 23:20 | 4224 |
|
C2.3
|
22:31 | 22:38 | 22:44 | 4220 |
|
C2.1
|
20:12 | 20:15 | 20:19 | 4217 |
|
C1.6
|
17:25 | 17:33 | 17:50 | 4228 |
|
C1.6
|
15:23 | 15:31 | 15:36 | 4217 |
|
C1.7
|
12:47 | 12:57 | 13:10 | — |
|
C2.1
|
12:03 | 12:17 | 12:38 | 4220 |
|
C2.8
|
10:57 | 11:03 | 11:19 | 4220 |
|
C2.4
|
10:07 | 10:37 | 11:15 | 4217 |
|
C3.4
|
01:27 | 01:41 | 02:04 | 4220 |