Did you know? Here’s a space weather and radio...

Did you know? Here’s a space weather and radio propagation educational tidbit – from http://SunSpotWatch.com – at 14:00 UTC on 2017-04-11:

A geomagnetic storm is defined by changes in the “Dst” (or, “DST”), which stands for the “Disturbance, storm time” index. A geomagnetic storm has three phases: an initial phase, a main phase and a recovery phase.

The main phase of a geomagnetic storm is defined by Dst decreasing to less than -50 nT. The minimum value during a geomagnetic storm will be between -50 and approximately -600 nT. The duration of the main phase of geomagnetic storms is typically between 2 and 8 hours.

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