Solar activity forecast for the period February 19 - February 20, 2026

Issued: 2026 February 18 17:00 UTC


Analysis from February 17/1700 UTC to February 18/1700 UTC:

Sunspot Regions on the Disk 18/1115 UTC (SDO Continuum): 3
The Largest Event: C1.8 from Region 4374 at 17/2323 UT
X-ray background flux (1.0-8.0 A) February 17: B4.3
Radio Flux 10.7 cm at 17/2300 UTC (Penticton): 122
Solar Wind Speed at 18/1645 UTC: 455.8 km/s, Density: 1.6 p/cm^3


Forecast:

activity level will be low
Event probabilities: Class C: 60, Class M: 25, Class X: 05, Proton: 01
X-ray background flux (1.0-8.0 A): in the range B3.5-B4.5
Radio Flux 10.7 cm: a fluctuation in the range 110-134

Karolína Knesplová
RWC Prague, Astronomical Institute, Solar Dept., Ondrejov, Czech Republic
e-mail: sunwatch(at)asu.cas.cz