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 2017-06-27:

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 geomagnetic storm recovery phase is that period when Dst changes from the minimum value to its quiet-time value. The period of the geomagnetic storm recovery phase may be as short as 8 hours or as long as 7 days.

Size of a geomagnetic storm is classified as: (1) moderate ( -50 nT >minimum of Dst > -100 nT) (2) intense (-100 nT > minimum Dst > -250 nT) (3) super-storm ( minimum of Dst < -250 nT)

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