The band condition indicators are calculated from these solar indices, to give an indication of conditions on LF (<10MHz), MF (10 – 20MHz) and HF (>20MHz). Band conditions are shown using a scale that runs:

- Very Good
- Good
- Moderate
- Fair
- Poor
- Very Poor

Current Solar Data (from NOAA):

Solar X-rays: Geomagnetic Field:

From n3kl.org

Solar-Terrestrial Data

Other usefull sources:

Propagation page on qsl.net;
Propagation page on hfradio.org;
Propagation bulletins on ARRL;
Propagation page on eHam.