The Hay Day

fl 71 said

I think the term for that is skip. Not quite sure how it works. Sure someone here can explain it.

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Skywave or skip refers to the propagation of radio waves reflected or refracted back toward Earth from the ionosphere, an electrically charged layer of the upper atmosphere.

As a result of skywave propagation, a signal from a distant AM broadcasting station, or—during certain conditions (principally during the summer months in both hemispheres) a distant VHF FM or TV station can sometimes be received as clearly as local stations. Most long-distance shortwave radio communication—between 3 and 30 MHz—is a result of skywave propagation. Since the early 1920s amateur radio operators (or "hams"), limited to lower transmitter power than broadcast stations, have taken advantage of skywave for long distance communication.