Getting back to that Argentina call. One thing KO6BTY pointed out was that the FoF2 numbers didn't look normal. She was correct to an extent. They definitely didn't look like they did a few months ago. Early morning UTC time, the critical frequency numbers looked like this Critical Frequency at time of QSO to LW2DO in Argentina A few months ago, in February though, they looked like this at roughly the same time of day. Critical Frequency map in February of 2025 a few hours earlier in the day Patterns in the F2 Layer If you're curious how she spotted the difference quickly, we've identified features that are usually on the map, the 'goose', and the 'face.' The Goose The Goose is characterized in profile with it's beak usually outlined in blue. It's circled by the green line above. The Face The Face is perhaps a bit more obvious. Again, it's circled in green. The two low critical frquency zones, (black regions), form the eyes. The black spot ...