Geomagnetic Tracing of the Inner Heliosphere |
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Authors: | Ponyavin Dmitri I |
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Institution: | (1) Institute of Physics, University of St.Petersburg, 198504, Russia |
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Abstract: | Historical data of the geomagnetic activity records in St. Petersburg since 1841 do not show any ‘doubling’ of the total magnetic
field at the Sun as claimed recently by Lockwood et al. (1999). However, recurrent patterns of the geomagnetic activity variations display ‘secular’ trend of the solar wind near
ecliptic plane resulting from gradual change of the topological structure of the solar corona (Ponyavin, 1997). By comparing
geomagnetic and eclipse observations we found ‘typical’ coronal shapes, which correspond better to periods of extremely low
and high geomagnetic activity level rather than standard sunspot activity referencing as ‘Corona at Solar Maximum or Minimum’.
Using geomagnetic records as proxies it has been suggested that the maximum of the sunspot activity was in July 2000.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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