Týždenná predpoveď
slnečnej aktivity

Solar activity forecast for the period April 20 – April 26, 2018
Issued: 2018 Apr 19 2000 UTC

Activity level from Apr 20 to Apr 23: mostly very low
X-ray background flux (1.0-8.0 A): in the range A0.0-A8.0
Radio flux (10.7 cm): a fluctuation in the range 65-80 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 0-25

Activity level from Apr 24 to Apr 26: mostly very low
X-ray background flux (1.0-8.0 A): in the range A0.0-A9.0
Radio flux (10.7 cm): a fluctuation in the range 65-80 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 0-30

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

Geomagnetic activity forecast for the period April 20 – April 26, 2018
Issued: 2018 Apr 19 2230 UTC

Quiet: Apr 24 – 26
Quiet to unsettled: Apr 20, 23
Quiet to active: Apr 21 – 22

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