HF Systems
FORECAST SOL: Normal green MAG: Disturbed red ION: Normal green
HomeHF SystemsGlobal HFT Index Map Saturday, Feb 17 2018 21:15 UT
Global HF

T Index Map

This image shows the difference between current observed hourly conditions and predicted monthly conditions for the global ionosphere. Depressions and enhancements are with respect to the SWS predicted monthly T index for that month.

Global Ionospheric Map

Colour legend

Colour Conditions
blue enhanced
green normal
yellow mildly depressed
red depressed

See also a 0 degree longitude centred map.

go to top of page