#Grey Line

Grey Line articles explain the band openings that appear around sunrise and sunset along the day-night terminator. On the low bands these short openings can bring stations that are not workable at any other time. Contest logs show the effect clearly when QSOs are counted by hour and by band. Learning to read these peaks helps you plan when to be on 160, 80 and 40 metres and when to move to another band. The articles stay general, because propagation changes with the season and the solar cycle. They link the theory to the numbers in your own log.