Hvezdáreň Roztoky

July 2 – 8, 2021

Solar activity forecast for the period July 2 – 8, 2021

Issued: 2021 Jul 1 2100 UTC

Activity level from Jul 2 to Jul 5: very low to moderate
X-ray background flux (1.0-8.0 A): in the range A7.0-B5.0
Radio flux (10.7 cm): a fluctuation in the range 85-100 f.u.
Events: class C (0-10/day), class M (0-1/day), class X (0/period), proton (0/period)
Relative sunspot number (Ri): in the range 11-60

Activity level from Jul 6 to Jul 8: very low to moderate
X-ray background flux (1.0-8.0 A): in the range A4.0-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 0-55

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 2 – 8, 2021

Issued: 2021 Jul 1 2130 UTC

Quiet to unsettled: Jul 2 – 8

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