Týždenná predpoveď slnečnej
a geomagnetickej aktivity
Solar activity forecast for the period August 21 – 27, 2026
Issued: 2026 Aug 20 2100 UTC
Activity level from Aug 21 to Aug 24: low to high
X-ray background flux (1.0-8.0 A): in the range B3.0-C2.0
Radio flux (10.7 cm): a fluctuation in the range 105-160 f.u.
Events: class C: 1-22/day, class M: 0-8/day, class X: 0-1/day, proton: 0-1/period
Relative sunspot number (Ri): in the range 25-155
Activity level from Aug 25 to Aug 27: low to high
X-ray background flux (1.0-8.0 A): in the range B2.0-C2.0
Radio flux (10.7 cm): a fluctuation in the range 100-160 f.u.
Events: class C: 1-22/day, class M: 0-8/day, class X: 0-1/day, proton: 0-1/period
Relative sunspot number (Ri): in the range 20-155
Jozef Lesko
Vihorlat observatory, Slovak Republic
e-mail: safor (at) protonmail.ch
Geomagnetic activity forecast for the period August 21 – 27, 2026
Issued: 2026 Aug 20 2130 UTC
Jozef Lesko
Vihorlat observatory, Slovak Republic
e-mail: safor (at) protonmail.ch