| Range 1 (minor) to 5 (extreme) | |||
| NOAA Scale | Past 24 hrs | Current | Fcst 24 hrs |
|---|---|---|---|
| Geomagnetic Storms | None |
None |
None |
| Solar Radiation Storms | None |
None |
None |
| Radio Blackouts | None |
None |
None |
| Title | Rating |
|---|---|
| Basics of Radio Wave Propagation | |
| Solar Influences Data Analysis Center | |
| High Latitude Geomagnetic data A dynamic collection of high latitude geomagnetic data from 12 Canadian observatories. | |
| The Aurora Alarm Free service that sends an email when an aurora is imminent. | |
| AE4RV's Propagation Primer A Flash movie that describes how HF (shortwave) radio propagation works for beginners. | |
| Radio Line of Sight Plot Server | |
| DXrobot Automatic real-time AURORA and E-skip warnings via email or mobile phone. | |
| hfradio.org Propagation Page HF and SWL propagation data and forecasts. | |
| Grey Line Map An automatically refreshing, real-time world map showing daylight, twilight (greyline or grayline) and darkness. | |
| Real-Time 24 Hour Effective Sunspot Number | |
| MSU Solar Physics Group Of interest to solar keen hams is the YPOP section. Near real time movies of active solar regions in JAVA,GIF or MPEG. | |
| HF Propagation Predictions from the United Kingdom Table of path openings by band for major cities around the world. The table has been optimised for U.K. radio amateurs. | |
| Current Hydrogen-Alpha Solar Image Updated every minute! | |
| Space Weather Bureau Daily monitoring of solar flares, geomagnetic storms, Earth's aurora, and all forms of space weather. sunspots, the sun, solar flares, sun quake, sunquakes | |
| IPS Radio and Space Services Australian space weather agency. | |
| Propagation Studies Committee of the Radio Society of Great Britain | |
| SM6EHY on Propagation (below 10 MHz) | |
| Super Dual Auroral Radar Network SuperDARN is a network of high-frequency radars used to study the Earth's ionosphere. | |
| Solar Terrestrial Dispatch Ham Page | |
| Sunrise, Sunset &Twilight by local Time Zone |