Solar activity forecast for the period May 14 - May 15, 2021

Issued: 2021 May 13 17:00 UTC


Analysis from May 12/1700 UTC to May 13/1700 UTC:

Sunspot Regions on the Disk 13/1611 UTC (SDO Continuum): 2
The Largest Event: B3.5 from Region 2822 at 13/0244 UT
X-ray background flux (1.0-8.0 A) May 12: A8.5
Radio Flux 10.7 cm at 12/2300 UTC (Penticton): 75
Solar Wind Speed at 13/1645 UTC: 413.3 km/s, Density: 0 p/cm^3


Forecast:

activity level will be very low to low
Event probabilities: Class C: 40, Class M: 05, Class X: 01, Proton: 01
X-ray background flux (1.0-8.0 A): in the range A7.5-A8.5
Radio Flux 10.7 cm: a fluctuation in the range 75-77

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