Space Weather Nowcasts Daily condition Date: 23 August 2021; 11:45 UT Summary of Space Weather. Sunspot AR2859 is cracking with C-class solar flares. The geomagnetic conditions are quiet at all levels. The solar wind speed has slightly increased Space Weather parameters / observations; Sunspot Number: 16 10.7cm Flux: 77 sfu Solar wind speed: 300.5 km.s-1 Solar wind density: 16.0 protons.cm3 Kp: 1 Bz: 3.9 nT (North) Bt: 4.1 nT Dst: 20 nT