Did you know? Here's a space weather and radio propagation educational tidbit -- from http://nw7us.us/swc -- at 14:00 UTC on 2015-03-25:
The E-region of the ionosphere lies between approximately 90 and 140 km and is dynamic. The ionosphere's E-region is ionized by soft x-ray solar radiation.
Don't forget to visit our live space weather and radio propagation web site, at: http://SunSpotWatch.com
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