Topband: THIS computes

[N7DF]

If anyone was listening to the signals on 80 and 160 yesterday around North America sunset they would have heard a sudden improvemrnt of propagation for a short period.
I noticed this particularly on the signal from TJ9PF.
Their signals had never risen above an S 5 to 6 on either band but were coming in at 10 to 15 over S 9 around sunset.  They dropped off sharply within an hour.
There was a burst of HF radio emissions from a sunspot only a few hours prior to this occurrence. See the chart of related X-ray emmisions at this link
http://www.swpc.noaa.gov/rt_plots/xray_5m.html