Issue |
J. Space Weather Space Clim.
Volume 3, 2013
Space Climate
|
|
---|---|---|
Article Number | A09 | |
Number of page(s) | 11 | |
DOI | https://doi.org/10.1051/swsc/2013032 | |
Published online | 06 March 2013 |
Statistics of sunspot group clusters
Astronomical Institute, University of Wrocław, Kopernika 11, 51–622 Wrocław, Poland
* Corresponding author: e-mail: r-get@wp.pl
Received:
27
February
2012
Accepted:
16
February
2013
The Zubrzycki method is utilized to find all sunspot groups which are close to each other during each Carrington rotation. The sunspot group areas and their positions for the years 1874–2008 are used. The descending, the ascending and the maximum phases of solar cycles for each solar hemisphere are considered separately. To establish the size of the region D where the clusters are searched, the correlation function dependent on the distance between two groups is applied. The method estimates the weighted area of each cluster. The weights dependent on the correlation function of distances between sunspot groups created each cluster. For each cluster the weighted position is also evaluated. The weights dependent on the areas of sunspot groups created a given cluster. The number distribution of the sunspot groups created each cluster and the cluster statistics within different phases of the 11-year cycle and within all considered solar cycles are also presented.
Key words: Sun / sunspot / statistics and probability / variability
© R. Getko, Published by EDP Sciences 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.