Table 5

Periods of various levels of solar activity used for comparison to NOAA F10.7 forecast.

Solar activity High Decreasing Low Increasing
Begin date 30 Sept 2001 31 Aug 2003 17 Jan 2008 01 May 2011
End date 30 Sept 2002 30 Aug 2004 16 Jan 2009 30 Apr 2012

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