Týždenná predpoveď slnečnej
a geomagnetickej aktivity

Solar activity forecast for the period June 26 – July 2, 2026

Issued: 2026 Jun 25 2100 UTC

Activity level from Jun 26 to Jun 29: 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 125-185 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 35-175

Activity level from Jun 30 to Jul 2: 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 115-175 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 25-165

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

Geomagnetic activity forecast for the period June 26 – July 2, 2026

Issued: 2026 Jun 25 2130 UTC

Quiet to active: Jun 26 – Jul 2

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