Hi Everybody; We just came across a very interesting correlation between solar activity and earthquakes here on earth and found a paper on it...
... or is there just an element of it that is truly mysterious? I was thinking about this today because it has been a relatively good day for DX...
Hi all, This is a project that I've been working on for around 8 months, and it's been publicly available for most of that time, but I've finally...
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...
While playing with antennas today, I ran across two of the old fashioned "Numbers Stations" on the MW / AM bands.... specifically on 635khz, at...
Hi Everybody; As August comes around, the famous Perseid Meteors start to cross path with earth. We have encountered the first 7 individual...
Sporadic-E propagation allows us hams to send and receive signals over great distances, through the ionosphere during brief and crazy...
When the weather starts to cool off in a few weeks, I have a path between two different locations that I would like to investigate using 2m. The...
Hi Everybody; A massive shortwave radio blackout continues to disrupt the Pacific West of America! It is not caused by the sun (the sun is...
Hello all, What do you know about the 220MHz band and the band's propagation? I am inquiring about your knowledge, experience, or even research,...
Hello all, I am inquiring of yall about research, data, studies, experiments, etc. that have been done on 220 MHz propagation; whether it's on the...
Hi everyone, I've been working a lot of CW lately. I've been trying to get away from my old method of using the S-meter for RST reports, as I've...
[IMG] On Friday the National Weather Service (USA) released it's Solar Cycle 25 prediction. Essentially it says: 1. The current solar cycle,...
Hi Everyone; Evidence has been mounting that it might be possible to detect earthquakes by measuring the changes in the ionosphere. The...
Hi Everybody: On Spaceweather.com there is a story about Rob Stammes of the Polarlightcenter, a magnetic observatory in Norway. He recorded a...
For discussion: Posts have been made on various boards to the effect that the elevation pattern of a vertical monopole requires reflections from...
Hams are mostly interested in the space wave radiated by an antenna system. The NEC4.2 plots below show how the space wave and ground wave fields...
What does it mean when the predicted LUF is higher than the predicted MUF? Below is a snippet from the ARRL’s propagation chart for October 2018....
Hi Everybody; As the sun plummets into the solar minimum a new index is derived to measure the total energy budget of the planet. The heating of...
https://arstechnica.com/science/2018/09/world-war-ii-bombings-weakened-upper-atmosphere-at-edge-of-space/ University of Reading, UK, researchers,...
