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Solar flares — September 21, 2025

Home Solar flares September 21, 2025

The strongest solar flare in the day

Flare of C3.4 level (normal) — in 00:11

Solar activity index

Value for Sep 21, 2025 24:00 (end on the day) . The maximum value is 10.0

Solar activity index

Solar flares in 2 days

Chart of solar activity from Sep 20, 2025 to Sep 21, 2025

Time zone — UTC+04 (Tbilisi)

Solar flares
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
21:33 21:43 21:50 4224
C2.3
21:01 21:08 21:14 4220
C2.1
18:42 18:45 18:49 4217
C1.6
15:55 16:03 16:20 4228
C1.6
13:53 14:01 14:06 4217
C1.7
11:17 11:27 11:40
C2.1
10:33 10:47 11:08 4220
C2.8
09:27 09:33 09:49 4220
C2.4
08:37 09:07 09:45 4217
C3.4
23:57 00:11 00:34 4220