- Sunspots@ (6)
- The American Radio Relay League's propagation bulletins.www.arrl.org/w1aw/prop
- Links to many propagation reports and weather forecasts.www.hamradio-online.com/propagation.html
- KSU Amateur Radio Club W0QQQ provides high frequency propagation indicators.www.k-state.edu/ksuarc/solar.html
- Global maps and many propagation links.www.panix.com/clay/ham/propagation.html