Hvezdáreň Roztoky

April 30 – May 6, 2021

Solar activity forecast for the period April 30 – May 6, 2021

Issued: 2021 Apr 29 2100 UTC

Activity level from Apr 30 to May 3: 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 (0-1/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 4 to May 6: 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 (0-1/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 April 30 – May 6, 2021

Issued: 2021 Apr 29 2130 UTC

Quiet to unsettled: Apr 30 – May 6

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