Space Weather Nowcasts Daily condition Date: 23 September 2021; 10:45 UT Summary of Space Weather. Sunspot AR2871 has a 'delta-class' magnetic field that harbours energy for M-class solar flares. The geomagnetic conditions are unsetteled.The solar wind speed has slightly increased. Space Weather parameters / observations; Sunspot Number: 76 10.7cm Flux: 89 sfu Solar wind speed: 379.0 km.s-1 Solar wind density: 11.0 protons.cm3 Kp: 4 Bz: -1.1 nT (South) Bt: 5.7 nT Dst: -13 nT