September 5 – 11, 2025

Solar activity forecast for the period September 5 – 11, 2025

Issued: 2025 Sep 4 2100 UTC

Activity level from Sep 5 to Sep 8: low to high
X-ray background flux (1.0-8.0 A): in the range B7.0-C4.0
Radio flux (10.7 cm): a fluctuation in the range 140-210 f.u.
Events: class C: 1-25/day, class M: 0-6/day, class X: 0-1/day, proton: 0-1/period
Relative sunspot number (Ri): in the range 45-210

Activity level from Sep 9 to Sep 11: low to high
X-ray background flux (1.0-8.0 A): in the range B5.0-C3.0
Radio flux (10.7 cm): a fluctuation in the range 120-190 f.u.
Events: class C: 1-25/day, class M: 0-6/day, class X: 0-1/day, proton: 0-1/period
Relative sunspot number (Ri): in the range 35-180

Jozef Lesko
Roztoky Observatory, Slovak Republic
https://roztoky.space/category/predpovede/
e-mail: safor (at) protonmail.ch

Geomagnetic activity forecast for the period September 5 – 11, 2025

Issued: 2025 Sep 4 2130 UTC

Quiet to active: Sep 5 – 11

Jozef Lesko
Roztoky Observatory, Slovak Republic
https://roztoky.space/category/predpovede/
e-mail: safor (at) protonmail.ch