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Propagation Forecast Bulletin #18 de K7RA:

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The data at the end of last week's Propagation Forecast Bulletin ARLP017 reported daily sunspot numbers from April 16-22 were six zeros, then 11, when in fact they were zero on every day until April 21, when it was 11, then zero again the next day, April 22. Just as many zero sunspot days -- and only one day with a sunspot -- but on Tuesday, April 21, and not April 22.

Read more: eHam.net News


 
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