
"A new model for plasma flow within the sun provides novel explanations for sunspots, the 11-year sunspot cycle, solar magnetic reversals and other previously unexplained solar phenomena."
"For 400 years people have tracked sunspots, the dark patches that appear for weeks at a time on the sun's surface. They have observed but been unable to explain why the number of spots peaks every 11 years.
A University of Washington study published this month in the journal Physics of Plasmas proposes a model of plasma motion that would explain the 11-year sunspot cycle and several other previously mysterious properties of the sun."
https://www.sciencedaily.com/releases/2019/09/190919095224.htm