#Propagation

Propagation describes how radio signals travel between stations, and in HF contesting it changes with the time of day, the season and solar activity. Indicators such as the solar flux and the K index give a rough idea of conditions, but they do not replace listening on the band. This tag collects articles about how propagation changes contest results and how to compare different years fairly when conditions were not the same. Learning to separate the effect of conditions from your own performance gives you better goals and a more honest view of your progress. Posts under this tag stay general and point to official sources for current solar and geomagnetic data.