September 22 – 28, 2023

Solar activity forecast for the period September 22 – 28, 2023

Issued: 2023 Sep 21 2100 UTC

Activity level from Sep 22 to Sep 25: low to high
X-ray background flux (1.0-8.0 A): in the range B8.0-C3.0
Radio flux (10.7 cm): a fluctuation in the range 145-200 f.u.
Events: class C (2-20/day), class M (0-6/day), class X (0-1/period), proton (0-1/period)
Relative sunspot number (Ri): in the range 75-190

Activity level from Sep 26 to Sep 28: low to high
X-ray background flux (1.0-8.0 A): in the range B7.0-C3.0
Radio flux (10.7 cm): a fluctuation in the range 140-195 f.u.
Events: class C (2-20/day), class M (0-6/day), class X (0-1/period), proton (0-1/period)
Relative sunspot number (Ri): in the range 70-185

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

Geomagnetic activity forecast for the period September 22 – 28, 2023

Issued: 2023 Sep 21 2130 UTC

Quiet to unsettled: Sep 26 – 28
Quiet to active: Sep 22 – 25

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