Hvezdáreň Roztoky

July 30 – August 5, 2021

Solar activity forecast for the period July 30 – August 5, 2021

Issued: 2021 Jul 29 2100 UTC

Activity level from Jul 30 to Aug 2: very low to low
X-ray background flux (1.0-8.0 A): in the range A3.0-B3.0
Radio flux (10.7 cm): a fluctuation in the range 70-90 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 0-45

Activity level from Aug 3 to Aug 5: very low to low
X-ray background flux (1.0-8.0 A): in the range A3.0-B3.0
Radio flux (10.7 cm): a fluctuation in the range 70-90 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 0-45

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 July 30 – August 5, 2021

Issued: 2021 Jul 29 2130 UTC

Quiet to unsettled: Jul 30 – Aug 5

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