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Propagation Trends 2013-2014. Solar Maximum ! A Double Peaked Sunspot Cycle ?. Every 6 Meter DXer Remembers This! The Second Sunspot Peak of Solar Cycle 23. 400 Years of Sunspot Observations 60 years of high sunspot cycles have probably come to an end. 40 years. 70 years.
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Propagation Trends 2013-2014 Solar Maximum !A Double Peaked Sunspot Cycle ? Dayton 2013
Every 6 Meter DXer Remembers This! The Second Sunspot Peak of Solar Cycle 23 Dayton 2013
400 Years of Sunspot Observations60 years of high sunspot cycleshave probably come to an end 40 years 70 years Dayton 2013
Solar Cycle 24compared to all solar cycles since 1944 Cycle 24 the lowest solar minimum in 100 years followed by the lowest solar cycle in 100 years Dayton 2013
Solar Cycle 24 ProgressActual vs. Prediction Prediction Actual Sunspot Number http://solarscience.msfc.nasa.gov/images/ssn_predict_l.gif
Solar Cycle 24 Prediction compared to similar Solar Cycle 14 two years between Solar Cycle 14 peaks many solar scientists expect a double peaked Solar Cycle 24 Dayton 2013
Why are there Often Double Solar Cycle Peaks? Sunspot Number solar northern and southern hemisphere solar cycle peaks never occur at the same time Dayton 2013
Solar Cycle 24 is similar to Cycle 14the solar southern hemisphere sunspot peak occurred two years after the northern hemisphere sunspot peak two years between sunspot peaks Sunspot Groups per Month N S southern hemisphere sunspots started to increase one year after the northern hemisphere sunspot peak Dayton 2013
The Last Two Solar Cycles also had Double Peaksbut very different than weaker Solar Cycle 24 two years between sunspot peaks two years between sunspot peaks N S N S southern hemisphere sunspots started to increase one year after the northern hemisphere sunspot peak Dayton 2013
Sunspot Production has Slowed in Both Solar Hemispheres southern hemisphere sunspot production slowed after peaking in June - July 2012 northern hemisphere sunspot production slowed after peaking in Sep - Dec 2011 Sunspot Groups per Month ? N S southern hemisphere sunspot production continues to lag behind northern hemisphere sunspot production Dayton 2013
Progress of Solar Cycle 24Northern and Southern Hemispheres Dayton 2013
Solar North-South Polar Field Reversalsolar maximum usually occurs whenboth polar fields have reversed polarity north polar field strength is slowly increasing July 2012 – May 2013 north polar field reversed in June 2012 (smoothed) field reversal N smoothed polar field strength micro-Tesla south polar field strength is very, very slowly decreasing Dec 2012 – May 2013 S Jan 2012 Jan 2013 progress of south polar field reversal is exceptionally slow Dayton 2013
Weak Solar Cycle 24 has been Unusually Favorable for 160 and 80 MetersThe A-index has been much lower than normal Solar Cycle 23 double peaks the A index usually increases during the first two years after solar maximum unusually low A index The A-Index mayincrease moderately after Solar Cycle 24 maximum Dayton 2013
A Long Range Estimate of Solar Cycle 25are sunspots disappearing? http://myweb.wwu.edu/dbunny/pdfs/Solar-Cycle-25-Amplitude-estimate.pdf some solar scientists expect Cycle 25 to be the weakest solar cycle in 400 years http://www.landscheidt.info/?q=node/280
