Excellent article by James, AB1DQ
As I write this in May 2021 there is much excitement in the amateur radio community as Solar Cycle 25 has been confirmed to have finally begun.
Every 11 years or so, the Sun’s magnetic field completely flips. This means that the Sun’s north and south poles switch places. Then it takes about another 11 years for the Sun’s north and south poles to flip back again.
The solar cycle affects activity on the surface of the Sun, such as sunspots and solar flares which are caused by the Sun’s magnetic fields. As the magnetic fields change, so does the amount of solar activity on the Sun’s surface which produce large emissions of radiations from the surface of the sun into space.
For amateur radio operators high solar activity means more favorable conditions for operating DX, or making long distance contacts. Radio waves, which are electro-magnetic can be reflected off…
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