April 21 – 27, 2023

Solar activity forecast for the period April 21 – 27, 2023

Issued: 2023 Apr 20 2100 UTC

Activity level from Apr 21 to Apr 24: low to high
X-ray background flux (1.0-8.0 A): in the range B6.0-C3.0
Radio flux (10.7 cm): a fluctuation in the range 135-195 f.u.
Events: class C (2-20/day), class M (0-6/day), class X (0-1/period), proton (0/period)
Relative sunspot number (Ri): in the range 60-175

Activity level from Apr 25 to Apr 27: low to moderate
X-ray background flux (1.0-8.0 A): in the range B5.0-C2.0
Radio flux (10.7 cm): a fluctuation in the range 125-175 f.u.
Events: class C (1-15/day), class M (0-4/day), class X (0/period), proton (0/period)
Relative sunspot number (Ri): in the range 55-150

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

Geomagnetic activity forecast for the period April 21 – 27, 2023

Issued: 2023 Apr 20 2130 UTC

Quiet to active: Apr 21 – 27

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