Solar activity forecast for the period May 11 - May 12, 2026

Issued: 2026 May 10 17:00 UTC


Analysis from May 09/1700 UTC to May 10/1700 UTC:

Sunspot Regions on the Disk 10/1623 UTC (SDO Continuum): 6
The Largest Event: M5.8 from Region 4436 at 10/1339 UT
X-ray background flux (1.0-8.0 A) May 09: B9.4
Radio Flux 10.7 cm at 09/2300 UTC (Penticton): 122
Solar Wind Speed at 10/1645 UTC: 397.3 km/s, Density: 2.5 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 B9.0 - B9.8
Radio Flux 10.7 cm: a fluctuation in the range 125-135

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