June 20 – 26, 2025

Solar activity forecast for the period June 20 – 26, 2025

Issued: 2025 Jun 19 2100 UTC

Activity level from Jun 20 to Jun 23: low to high
X-ray background flux (1.0-8.0 A): in the range B9.0-C9.0
Radio flux (10.7 cm): a fluctuation in the range 120-180 f.u.
Events: class C: 1-25/day, class M: 0-10/day, class X: 0-1/day, proton: 0-1/period
Relative sunspot number (Ri): in the range 40-175

Activity level from Jun 24 to Jun 26: low to high
X-ray background flux (1.0-8.0 A): in the range B9.0-C9.0
Radio flux (10.7 cm): a fluctuation in the range 120-180 f.u.
Events: class C: 1-25/day, class M: 0-10/day, class X: 0-1/day, proton: 0-1/period
Relative sunspot number (Ri): in the range 40-175

Jozef Lesko
Roztoky Observatory, Slovak Republic
https://roztoky.space/category/predpovede/
e-mail: safor (at) protonmail.ch

Geomagnetic activity forecast for the period June 20 – 26, 2025

Issued: 2025 Jun 19 2130 UTC

Quiet to active: Jun 20 – 23
Unsettled to minor storm: Jun 24 – 26

Jozef Lesko
Roztoky Observatory, Slovak Republic
https://roztoky.space/category/predpovede/
e-mail: safor (at) protonmail.ch