By Ken Larson KJ6RZ, a complete guide to understanding soloar indices and values.

Notes on using the QST propagation charts to determine propagation conditions

Another interesting reports page with plots and graphs of solar flux. Interesting resources provided here includes, Solar images, a text 3 day solar geophysical forecast, a 3-days Solar X-Ray flux plot updated evety 5 minutes, The Satellite Environment Plot, combines satellite and ground-based data

Propagation forecast for current month edited by I2MQP in italian

Daily sun spots data collected by the Catania astrophysical observatory

Home of Live MUF V7, a telnet dxc client with e layer MUF calculations

Solar Flux reports, Current Alerts and Warnings from NOAA, 27 day forcast from NOAA, charts reflecting the past 7 years Solar cycle summary charts from NOAA

High frequecy and VHF radio propagation data, solar and geomagnetic real-time and historic data, as well as forecasts. A comprehensive propagation resource compiled by Tomas Hood, editor of the propagation columns of CQ, CQ VHF, Popular Communications, and Monitoring Times magazines. Solar Weather, Geomagnetic, Aurora, Ionospheric reports via eAlerts and webpage. WAP phone access. Live and educational resources, and more.

The NOAA Space Weather Scales were introduced as a way to communicate to the general public the current and future space weather conditions and their possible effects on people and systems. The scales describe the environmental disturbances for three event types: geomagnetic storms, solar radiation storms, and radio blackouts.

The aurora today, ground view from alaska

Understanding basic VHF and UHF propagation, eskip, Backscatter, Meteor Scatter and more

Prepared jointly by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center and the U.S. Air Force.

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

Monitors the space weather parameters essential for HF radio, including SSN/SFI, Ap/Kp, X-ray/Proton flux, and Auroral activity. IonoProbe downloads near-real time satellite and ground station data, stores information for future use and displays it in a user-friendly way.

Sporadic E notes with reference to ten meters FM by g4xgt

Flash Movie describing HF (shortwave) radio propagation to beginners. Very helpful aid in understanding.

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

Theory to explain solar cycles variability proposed by Jean-Pierre Desmoulins

How to understand when a new solar cycle starts. At the beginning of a new solar cycle, sunspots tend to form at high latitudes, but as the cycle reaches a maximum the spots form at lower latitudes.

Sounds of Space Weather by S. McGreevy, N6NKS