Hvezdáreň Roztoky

June 11 – 17, 2021

Solar activity forecast for the period June 11 – 17, 2021

Issued: 2021 Jun 10 2100 UTC

Activity level from Jun 11 to Jun 14: very low to low
X-ray background flux (1.0-8.0 A): in the range A2.0-B2.0
Radio flux (10.7 cm): a fluctuation in the range 70-90 f.u.
Events: class C (0-5/day), class M (0/period), class X (0/period), proton (0/period)
Relative sunspot number (Ri): in the range 0-40

Activity level from Jun 15 to Jun 17: very low to low
X-ray background flux (1.0-8.0 A): in the range A2.0-B2.0
Radio flux (10.7 cm): a fluctuation in the range 70-90 f.u.
Events: class C (0-5/day), class M (0/period), class X (0/period), proton (0/period)
Relative sunspot number (Ri): in the range 0-40

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 11 – 17, 2021

Issued: 2021 Jun 10 2130 UTC

Quiet to unsettled: Jun 11 – 13
Quiet to active: Jun 14 – 15
Unsettled to active: Jun 16 – 17

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