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Longitudinal asymmetry in sunspot activity during the ascending and descending phase of the solar cycle

Published online by Cambridge University Press:  14 March 2005

E. S. Vernova ,
K. Mursula ,
M. I. Tyasto  and
D. G. Baranov
E. S. Vernova
Affiliation:
Institute of Terrestrial Magnetism, Ionosphere and Radiowave Propagation of RAS, St. Petersburg Filial, St. Petersburg, Russia, email: d.baranov@mail.ioffe.ru
K. Mursula
Affiliation:
University of Oulu, Oulu, Finland, email: Kalevi.Mursula@oulu.fi
M. I. Tyasto
Affiliation:
Institute of Terrestrial Magnetism, Ionosphere and Radiowave Propagation of RAS, St. Petersburg Filial, St. Petersburg, Russia, email: d.baranov@mail.ioffe.ru
D. G. Baranov
Affiliation:
A.F. Ioffe Physical-Technical Institute, St. Petersburg, Russia, email: d.baranov@mail.ioffe.ru
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Abstract

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The longitudinal distribution of sunspot activity for 1917-1995 is studied using vector sums of sunspot areas. It is shown that the sunspot distributions behave differently during the Ascending phase and Maximum (AM) of the solar cycle on one hand and for the Declining phase and Minimum (DM) on the other depicting maxima around roughly opposite longitudes. While the maximum of the distribution for the AM period is found around the Carrington longitude of 180$^\circ$, the maximum for the DM period is at the longitude of about 0$^\circ$.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUS223 , June 2004 , pp. 155 - 156
Copyright
© 2004 International Astronomical Union