Space Weather Nowcasts Daily condition Date: 18 August 2021; 09:43 UT Summary of Space Weather. Sunspot AR2857 is decaying and does not pose threats for stromg solar flares. The geomagnetic conditions are quiet at all levels. The solar wind speed is declining. Space Weather parameters / observations; Sunspot Number: 13 10.7cm Flux: 73 sfu Solar wind speed: 424,2 km.s-1 Solar wind density: 3.7 protons.cm3 Kp: 1 Bz: -0.9 nT (South) Bt: 3.5 nT Dst: 2 nT