Saturday, June 25, 2016
Solar activity at a record low
In my 45 years as an Amateur Radio Operator (ham) I have not seen propagation this low. On June 25th, 2016 the Solar flux was at 77 and there were zero sun spots. To make the best of a very bad situation I did manage to contact two stations in Austrialia (VK) on the 40 meter band (7Mhz.) Solar activity cycles every eleven years and the perditions were; the low was one year ago. I think the low must be now in 2016. For all Amateur Radio operators lets hope for better conditions with Mr. Sun in the future. ..... Jack WB9OTX
Friday, July 18, 2014
Flux: 89 A-index: 5 K-Index: 1

Last week I posted a high above 200 for the solar flux. Today the solar flux is 89, this is the lowest I have observed in the past 45 years. What's going on ol' Sol ??
http://www.wm7d.net/hamradio/solar/index.shtml
Tuesday, June 08, 2010
Solar radio flux
Emission from the Sun at centimetric (radio) wavelength is due primarily to coronal plasma trapped in the magnetic fields overlying active regions.[15] The F10.7 index is a measure of the solar radio flux per unit frequency at a wavelength of 10.7 cm, near the peak of the observed solar radio emission. It represents a measure of diffuse, nonradiative heating of the coronal plasma trapped by magnetic fields over active regions, and is an excellent indicator of overall solar activity levels. The solar F10.7 cm record extends back to 1947, and is the longest direct record of solar activity available, other than sunspot-related quantities. Sunspot activity has a major effect on long distance radio communications particularly on the shortwave bands although medium wave and low VHF frequencies are also affected. High levels of sunspot activity lead to improved signal propagation on higher frequency bands, although they also increase the levels of solar noise and ionospheric disturbances. These effects are caused by impact of the increased level of solar radiation on the ionosphere. It has been proposed that 10.7 cm solar flux can interfere with point-to-point terrestrial communications.[16]
