Hvezdáreň Roztoky

December 10 – 16, 2021

Solar activity forecast for the period December 10 – 16, 2021

Issued: 2021 Dec 9 2100 UTC

Activity level from Dec 10 to Dec 13: very low to low
X-ray background flux (1.0-8.0 A): in the range A1.0-B1.0
Radio flux (10.7 cm): a fluctuation in the range 75-95 f.u.
Events: class C (0-10/day), class M (0-1/period), class X (0/period), proton (0/period)
Relative sunspot number (Ri): in the range 0-70

Activity level from Dec 14 to Dec 16: very low to low
X-ray background flux (1.0-8.0 A): in the range A2.0-B2.0
Radio flux (10.7 cm): a fluctuation in the range 75-95 f.u.
Events: class C (0-10/day), class M (0-1/period), class X (0/period), proton (0/period)
Relative sunspot number (Ri): in the range 0-70

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

Geomagnetic activity forecast for the period December 10 – 16, 2021

Issued: 2021 Dec 9 2130 UTC

Quiet to unsettled: Dec 10 – 16

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