1: News and Information About the Sun – Earth environment
2: Space Weather Now – Current solar data from Nation Weather Service Space Weather Prediction Center
3: N3KL Solar Activity Monitor – Has information on Solar X-rays and the Geomagnetic Field status.
4: N0NBH -HF Propagation Tools and Solar Data – This site is home of the popular Solar-Terrestrial Data Panels and has the information so you can add to your site this popular propagation tool.