There is no doubt that strange things could happen to signals under unusual propagation conditions. In my experience this could happen in a North-South or South-North direction and particularly at the equinoctes, but not really on E -W or W-E paths.
I have observed delays of several minutes to transmissions from PCH/SVA/HEB/GKA when in the S Atlantic or around Oz. A traffic list, for example, supposed to begin at a specified time would start four or five minutes later. After experiencing this over some days and with different stations, I had to conclude that the signals either went around the earth in an atmospheric duct for a while, or off into outer space before bouncing off something and returning to earth.
I favour the atmospheric duct idea because of the large temperature difference between my location and that of the transmitting station.
BUT I could be wrong. I just don't believe the story that began the thread.
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