421-426 www.ann-geophys.net/30/421/2012/ geomagnetic activity from to

HIGHLIGHTS

• who: Geomagnetism and collaborators from the Polytechnique de Bobo Dioulasso, BP , Bobo-Dioulasso, Burkina Faso , Saint-Maur-des-Fossés, France have published the Article: 421-426 www.ann-geophys.net/30/421/2012/ geomagnetic activity from to, in the Journal: (JOURNAL)
• what: For each class the authors determine the yearly level of activity as the sum of all the daily Aa of the days of the class. The authors investigate geomagnetic activity and its solar wind origins from 1868 to 2009 (142 years).
• how: The authors examined solar activity with a large . . .
  

   

  

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