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 - explanation
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