Hvezdáreň Roztoky

August 27 – September 2, 2021

Solar activity forecast for the period August 27 – September 2, 2021

Issued: 2021 Aug 26 2100 UTC

Activity level from Aug 27 to Aug 30: mostly low
X-ray background flux (1.0-8.0 A): in the range A8.0-B8.0
Radio flux (10.7 cm): a fluctuation in the range 80-110 f.u.
Events: class C (0-12/day), class M (0-1/day), class X (0/period), proton (0/period)
Relative sunspot number (Ri): in the range 11-70

Activity level from Aug 31 to Sep 2: mostly low
X-ray background flux (1.0-8.0 A): in the range A8.0-B8.0
Radio flux (10.7 cm): a fluctuation in the range 80-110 f.u.
Events: class C (0-12/day), class M (0-1/day), 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 August 27 – September 2, 2021

Issued: 2021 Aug 26 2130 UTC

Quiet to unsettled: Aug 30 – Sep 2
Unsettled to active: Aug 27 – 29

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