Solar activity forecast for the period April 17 - April 18, 2024

Issued: 2024 April 16 17:00 UTC


Analysis from April 15/1700 UTC to April 16/1700 UTC:

Sunspot Regions on the Disk 16/1341 UTC (SDO Continuum): 14
The Largest Event: M4.0 from Region 3639 at 15/1932 UT
X-ray background flux (1.0-8.0 A) April 15: C1.9
Radio Flux 10.7 cm at 15/2300 UTC (Penticton): 191
Solar Wind Speed at 16/1645 UTC: 361.2 km/s, Density: 4.4 p/cm^3


Forecast:

activity level will be moderate
Event probabilities: Class C: 70, Class M: 45, Class X: 15, Proton: 15
X-ray background flux (1.0-8.0 A): in the range C1.7-C1.9
Radio Flux 10.7 cm: a fluctuation in the range 185-235

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