Solar activity forecast for the period May 27 - May 28, 2026

Issued: 2026 May 26 17:00 UTC


Analysis from May 25/1700 UTC to May 26/1700 UTC:

Sunspot Regions on the Disk 26/1623 UTC (SDO Continuum): 11
The Largest Event: C9.7 from Region 4451 at 26/1258 UT
X-ray background flux (1.0-8.0 A) May 25: B9.9
Radio Flux 10.7 cm at 25/2300 UTC (Penticton): 141
Solar Wind Speed at 26/1645 UTC: 0 km/s, Density: 0 p/cm^3


Forecast:

activity level will be low to moderate
Event probabilities: Class C: 99, Class M: 45, Class X: 10, Proton: 10
X-ray background flux (1.0-8.0 A): in the range C1.0 - C1.5
Radio Flux 10.7 cm: a fluctuation in the range 140-145

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