The K index computed once every three hours, going from K=0 inactive to K=9 extremely severe storm. K=1 to K=3 is what you want to see.The A index computed from the eight previous k index avarage. A= 0 to 7 Quiet, anything above not good. The earth's magnetic field is monitored by magnetometers, these reading are converted in the K and A index.

Solar flux values: are radio emissions from the Sun at a wavelength of 10.7 cm.This determines the level of ionization, therefore the (MUF)

                     GRAY LINE PROPAGATION

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