Solar Reference Keys / Indexes and Geomagnetic Reference
NORMALITY | GEOMAG | K Values | Alpha |
| AN - Above Normal | Quiet | K=0-1 | 0-7 |
| HN - High Normal | Unsettled | K=2 | 8-15 |
| LN - Low Normal | Active | K=3 | 16-29 |
| BN - Below Normal | Minor Storm | K=4 | 30-49 |
| DIS - Disturbed | Major Storm | K=5 | 50-99 |
| VRY DIS - Very Disturbed | Severe Storm | K=6-9 | 100-400 |
Meanwhile, check out the following Web sites for propagation:
* VOACAP predication Web page at: http://www.voacap.com/hf
and http://www.voacap.com/prediction.html
* DX.QSL.NET Propagation page: https://dx.qsl.net/propagation
* SolarHam Web page: http://www.solarham.net
* Radio Propagation/Space Weather/Sunspot Cycle Information at:
http://sunspotwatch.com
* Space Weather Prediction Center (SWPC) & National Oceanic and Atmospheric Administration (NOAA):
https://www.swpc.noaa.gov
https://www.swpc.noaa.gov/products/solar-cycle-progression
* News and Information About The Sun-Earth Environment:
https://www.spaceweather.com
* Monthly propagation charts between four USA regions and twelve overseas locations are at: http://arrl.org/propagation
* Information and tutorials on propagation are at: http://k9la.us
* Graphic propagation tool by DR2W: http://www.dr2w.de/dx-propagation
* Point to point propagation at: http://www.predtest.uk/p2p.html
* Real-time propagation at: http://www.predtest.uk
