Hvezdáreň Roztoky

May 7 – 13, 2021

Solar activity forecast for the period May 7 – 13, 2021

Issued: 2021 May 6 2100 UTC

Activity level from May 7 to May 10: 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 (0-3/day), class M (0/period), class X (0/period), proton (0/period)
Relative sunspot number (Ri): in the range 0-40

Activity level from May 11 to May 13: 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 (0-3/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
e-mail: safor (at) protonmail.ch

Geomagnetic activity forecast for the period May 7 – 13, 2021

Issued: 2021 May 6 2130 UTC

Quiet to unsettled: May 7 – 13

Jozef Lesko
Roztoky Observatory, Slovak Republic
e-mail: safor (at) protonmail.ch