Solar activity forecast for the period May 12 - May 13, 2026

Issued: 2026 May 11 17:00 UTC


Analysis from May 10/1700 UTC to May 11/1700 UTC:

Sunspot Regions on the Disk 11/1315 UTC (SDO Continuum): 6
The Largest Event: C1.4 from Region 4432 at 11/0832 UT
X-ray background flux (1.0-8.0 A) May 10: B9.2
Radio Flux 10.7 cm at 10/2300 UTC (Penticton): 126
Solar Wind Speed at 11/1645 UTC: 386.2 km/s, Density: 4 p/cm^3


Forecast:

activity level will be low
Event probabilities: Class C: 99, Class M: 45, Class X: 15, Proton: 05
X-ray background flux (1.0-8.0 A): in the range B8.5-C1.5
Radio Flux 10.7 cm: a fluctuation in the range 114-138

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