Stig Östlund

söndag, mars 03, 2019

A MONTH WITHOUT SUNSPOTS

 The sun has just passed an entire calendar month with no sunspots. The last time this happened, in August 2008, the sun was in the nadir of a century-class Solar Minimum. The current stretch of blank suns shows that Solar Minimum has returned, and it could be as deep as the last one.
Mitt intresse för solfläckar "grundades" under min aktiva tid som radioamatör (rättare: sändaramatör). Solfläcksantalet
har betydelse för radiofrekvenser jag utnyttjade.

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