This is a highly informative map that can be used by amateur and professional radio communicators to determine maximum usable frequencies for any world-wide path at the indicated UTC (Zulu) time.

Display a table of last 30 days sunspots reports. Prepared by the U.S. Dept. of Commerce, NOAA, Space Environment Center

These pages provide general propagation advice for HF communicators. Information available includes inferred global propagation conditions, real time HF fadeout coverage charts, regional ionospheric vertical MUF maps and Hourly Area Prediction charts for Astralia and Asia, Europe and North America

*One single page* gives you an immediate overview of current shortwave propagation conditions at your location.

This is a propagation prediction program tailored to the serious contester

Live space weather and propagation data, in RSS (XML) format.

Broadcast via WWV and WWVH at 18 and 45 minutes past the hour. This message is updated every 3 hours. Reports current Solar-terrestrial indinces, Solar Flux, A-index, K-Index, forecast for space weather storms. Prepared by the US Dept. of Commerce, NOAA, Space Environment Center

Lights on why 160 meters is so unpredictable and what’s being done to reveal its secrets

This page contains dynamically updated propagation information.

Amateur radio propagation studies (science, research, engineering, operating) and the BeamFinder propagation analysis software