These pages are the start of a tutorial on how shortwave radio propagation works. They help to explain what the various numbers and readings that DX Toolbox reports mean, and how to interpret them, and gain a better understanding of the factors that affect shortwave radio propagation.

• Propagation Basics
• Solar Flux and Sunspots
• Solar Flares
• A Index and K Index
• Solar Wind
• Earth's Magnetic Field
• Radio Blackout conditions
• Geomagnetic Storm conditions
• Solar Radiation Storm conditions