RF Collins wrote in news:OvOdnUuYrMN73q_KnZ2dnUU7-
:


My favorite web site:

http://www.swpc.noaa.gov/

Has the planetary K index chart for the last 3 days. The A index is a
linearized average of the K index for the last 24 hours. So if all you see
are red bars, the band will probably be in bad shape.

Has the X ray flux so you can see if there have been any solar flares in
the last 3 days and how strong they were. This is where the SFI number
comes from.

There is always the solar terrestrial data at: www.qrz.com.

This is good for a quick summary of conditions but is not always up to
date.