Týždenná predpoveď slnečnej
a geomagnetickej aktivity
Solar activity forecast for the period September 11 – 17, 2026
Issued: 2026 Sep 10 2100 UTC
Activity level from Sep 11 to Sep 14: mostly low to moderate
X-ray background flux (1.0-8.0 A): in the range B1.0-C1.0
Radio flux (10.7 cm): a fluctuation in the range 95-145 f.u.
Events: class C: 0-20/day, class M: 0-4/day, class X: 0-1/period, proton: 0-1/period
Relative sunspot number (Ri): in the range 20-140
Activity level from Sep 15 to Sep 17: mostly low to moderate
X-ray background flux (1.0-8.0 A): in the range B1.0-C1.0
Radio flux (10.7 cm): a fluctuation in the range 95-145 f.u.
Events: class C: 0-20/day, class M: 0-4/day, class X: 0-1/period, proton: 0-1/period
Relative sunspot number (Ri): in the range 20-140
Jozef Lesko
Vihorlat observatory, Slovak Republic
e-mail: safor (at) protonmail.ch
Geomagnetic activity forecast for the period September 11 – 17, 2026
Issued: 2026 Sep 10 2130 UTC
Quiet to active: Sep 11 – 17
Jozef Lesko
Vihorlat observatory, Slovak Republic
e-mail: safor (at) protonmail.ch