Hvezdáreň Roztoky

December 24 – 30, 2021

Solar activity forecast for the period December 24 – 30, 2021

Issued: 2021 Dec 23 2100 UTC

Activity level from Dec 24 to Dec 27: low to moderate
X-ray background flux (1.0-8.0 A): in the range B3.0-C3.0
Radio flux (10.7 cm): a fluctuation in the range 110-140 f.u.
Events: class C (1-12/day), class M (0-2/day), class X (0-1/period), proton (0/period)
Relative sunspot number (Ri): in the range 50-120

Activity level from Dec 28 to Dec 30: low to moderate
X-ray background flux (1.0-8.0 A): in the range B2.0-C2.0
Radio flux (10.7 cm): a fluctuation in the range 90-130 f.u.
Events: class C (1-12/day), class M (0-2/day), class X (0-1/period), proton (0/period)
Relative sunspot number (Ri): in the range 35-105

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

Geomagnetic activity forecast for the period December 24 – 30, 2021

Issued: 2021 Dec 23 2130 UTC

Quiet to unsettled: Dec 27 – 30
Quiet to active: Dec 25 – 26
Unsettled to active: Dec 24

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