Bulletin: Current Conditions

23 September 2021

Solar activity is low to moderate with background X-ray flux at B-class levels. An M-class x-ray flares has been observed on 23 September from active region AR2871. The solar wind speed is near background levels with speeds ranging between 350 - 385 km/s. Geomagnetic conditions are at quiet. Local HF working frequencies are near monthly average predicted values.

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Daily Conditions

Date and Time (UT)foF2 (MHz)hmF2 (km)T indexAp
Grahamstown2021-09-23 17:006.150266.97140
Hermanus2021-09-23 17:006.850264.48142
Planetary Ap2021-09-23 16:3413


Predicted SANSA monthly T-Index for September 2021: 4