Not sure if this is the correct forum, but here goes. I've wondered for a while now why certain geographical areas seem to have better propagation than others. I base this on DX spotting network observations over the past 6 months. Example: Stations in New England, esp Maine, will spot a dx station, and I can't even pick them out of the noise. I notice similar scenarios with spots from Florida or the Caribbean. For the cases I'm remembering, the distance between my station and the DX is similar to the spotted station. I live in GA, which is kinda sort of mid-way between these two extremes of "Eastern North America," and it's always fascinated me how HF propagation seems to favor certain areas. I know it has a lot to do with antennas, and mine aren't the best, but on the other hand, when I call someone in a pile-up, I usually get them pretty quickly. My vertical with tons of radials is a great little performer. I'm certain there is a comprehensive and well-reasoned explanation to this phenomenon, I just haven't found it yet, and I'm the first to admit I don't know it all. Any of you fellow Dx'ers have insight to share? Is it an effect of latitude? I know proximity to salt water helps. What else?