Issued: 2026 March 22 17:00 UTC


Analysis from March 21/1700 UTC to March 22/1700 UTC:

Sunspot Regions on the Disk 22/1231 UTC (SDO Continuum): 11
The Largest Event: B9.6 from region 4399 at 22/1352 UT
X-ray background flux (1.0-8.0 A) March 21: B3.5
Radio Flux 10.7 cm at 21/2300 UTC (Penticton): 108
Solar Wind Speed at 22/1646 UTC: 653.4 km/s, density : 2.6 p/cm^3


Forecast:

Activity level will be: very low to low - explanation
Event probabilities: Class C: 65%, Class M: 25%, Class X: 15%, Proton: 10%
X-ray background flux (1.0-8.0 A): in the range B3.1-B3.7
Radio Flux 10.7 cm: a fluctuation in the range 100-110

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