More angular analysis of the footpoints and field line twist of 09004...

  
          fig.18. The total angular displacement taking place at the poles since 
           2000-05-18. The rate of change is steep at first and then reaches a
                   plateau. Data from Longcope and Ravindra, 2007.
 

 fig.19. The angle of twist of the magnetic field lines with time. Here, a
 positive twist of the field lines is evident again. The angle of twist of the
 field lines was computed using the length of each individual field line.   
a
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