Space Weather Nowcasts Daily condition Date: 17 September 2021; 23:44 UT Summary of Space Weather. The sun is spotless. A geomagnetic storm is in progress. The solar wind speed has increased. Space Weather parameters / observations; Sunspot Number: 0 10.7cm Flux: 75 sfu Solar wind speed: 396.8 km.s-1 Solar wind density: 16.7 protons.cm3 Kp: 1 Bz: 5.4 nT (North) Bt: 15.1 nT Dst: -64 nT