Date: 19 September 2021; 10:45 UT

Summary of Space Weather.
An old sunspot AR2860 has returned on the solar disc but has been renumbered as AR2871. The geomagnetic conditions are
quiet. The solar wind speed has declined.

Space Weather parameters / observations;

Sunspot Number: 11
10.7cm Flux: 76 sfu

Solar wind speed: 331.2 km.s-1
Solar wind density: 7.5 protons.cm3

Kp: 0
Bz: 4.3 nT (North)
Bt: 5.0 nT
Dst: -23 nT

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Date: 18 September 2021; 10:24 UT

Summary of Space Weather.
The sun is spotless. The geomagnetic conditions are quiet. The solar wind speed is increasing.

Space Weather parameters / observations;

Sunspot Number: 0
10.7cm Flux: 75 sfu

Solar wind speed: 396.1 km.s-1
Solar wind density: 17.4 protons.cm3

Kp: 0
Bz: 0.2 nT (North)
Bt: 6.9 nT
Dst: -36 nT

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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

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