Solar activity forecast for the period September 25 - September 26, 2023

Issued: 2023 September 24 17:00 UTC


Analysis from September 23/1700 UTC to September 24/1700 UTC:

Sunspot Regions on the Disk 24/1623 UTC (SDO Continuum): 10
The Largest Event: M4.4 from Region 3445 at 23/0328 UT
X-ray background flux (1.0-8.0 A) September 23: C1.4
Radio Flux 10.7 cm at 23/2000 UTC (Penticton): 174
Solar Wind Speed at 24/1645 UTC: 305.7 km/s, Density: 2.2 p/cm^3


Forecast:

activity level will be moderate
Event probabilities: Class C: 99, Class M: 70, Class X: 15, Proton: 15
X-ray background flux (1.0-8.0 A): in the range C1.2 - C1.8
Radio Flux 10.7 cm: a fluctuation in the range 172-177

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