Hvezdáreň Roztoky

June 25 – July 1, 2021

Solar activity forecast for the period June 25 – July 1, 2021

Issued: 2021 Jun 24 2100 UTC

Activity level from Jun 25 to Jun 28: 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 75-95 f.u.
Events: class C (0-10/day), class M (0/period), class X (0/period), proton (0/period)
Relative sunspot number (Ri): in the range 0-50

Activity level from Jun 29 to Jul 1: very low to moderate
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 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 0-50

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 June 25 – July 1, 2021

Issued: 2021 Jun 24 2130 UTC

Quiet: Jun 25 – 28
Quiet to unsettled: Jun 29 – Jul 1

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