[ARC5] The Not-So-Silent Bands

[Robert Nickels]

Space weather woman Dr. Tamitha Skov explains the impact of recent solar 
storms in today's 7 minute video report, including effects on GPS, 
amateur radio propagation, and aurora sightings:

https://www.youtube.com/watch?v=oMAl5b5cXm0

My own contribution is this look at 40 meter WSPR spots - the top map 
shows what was happening up to an hour before the M-Class flare at 1500Z 
today, and the bottom map shows a 10 minute window afterward.   The 
adsorption turned off the DX paths like flipping a switch, and both 5 
and 10 Mhz WWV remain absent at my QTH.

http://i.imgur.com/zyFqyi8.jpg

With the earth-directed CME hitting on the 8th, chances of aurora 
sightings are high, but propagation will continue to be poor.  The chart 
in the upper-right of this image gives an idea of how much attenuation 
occurs during these radio blackouts:

http://spaceweather.com/images2017/06sep17/blackoutmap.jpg?PHPSESSID=916ljr91kv3cmp6i80oafc3am1

73, Bob W9RAN