November 19 – 25, 2021

Solar activity forecast for the period November 19 – 25, 2021

Issued: 2021 Nov 18 2100 UTC

Activity level from Nov 19 to Nov 22: very low to low
X-ray background flux (1.0-8.0 A): in the range A1.0-A9.0
Radio flux (10.7 cm): a fluctuation in the range 75-95 f.u.
Events: class C (0-8/day), class M (0/period), class X (0/period), proton (0/period)
Relative sunspot number (Ri): in the range 11-65

Activity level from Nov 23 to Nov 25: 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 80-100 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 11-70

Jozef Lesko
Roztoky Observatory, Slovak Republic
www.osveta.sk/n/11283/astronomia.html
e-mail: safor (at) protonmail.ch

Geomagnetic activity forecast for the period November 19 – 25, 2021

Issued: 2021 Nov 18 2130 UTC

Quiet to unsettled: Nov 19, 24 – 25
Quiet to active: Nov 20 – 23

Jozef Lesko
Roztoky Observatory, Slovak Republic
www.osveta.sk/n/11283/astronomia.html
e-mail: safor (at) protonmail.ch