September 15 – 21, 2023

Solar activity forecast for the period September 15 – 21, 2023

Issued: 2023 Sep 14 2100 UTC

Activity level from Sep 15 to Sep 18: 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 130-185 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 60-175

Activity level from Sep 19 to Sep 21: 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 130-185 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 60-175

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

Geomagnetic activity forecast for the period September 15 – 21, 2023

Issued: 2023 Sep 14 2130 UTC

Quiet to active: Sep 15 – 21

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