Statistics of sunspot activity . The sunspot indices . ... The solar regions . ... 1997 . ... June . ... June, 1997 . Visual indices of solar activity by author's observations . ... Average . ... 0.00 . ...
Statistics of sunspot activity . The sunspot indices . ... The solar regions . ... 1997 . ... April . ... April, 1997 . Visual indices of solar activity by author's observations . ... Average . ... 0.00 . ...
Statistics of sunspot activity . The sunspot indices . ... The solar regions . ... 1997 . ... March . ... March, 1997 . Visual indices of solar activity by author's observations . ... Average . ... 0.00 . ...
Statistics of sunspot activity . The sunspot indices . ... The solar regions . ... 1997 . ... February . ... February, 1997 . Visual indices of solar activity by author's observations . ... Average . ... 0.00 . ...
Statistics of sunspot activity . The sunspot indices . ... The solar regions . ... 1997 . January . ... January, 1997 . Visual indices of solar activity by author's observations . ... Average . ... 0.00 . ...
Statistics of sunspot activity . The sunspot indices . ... NGDC's observations . The solar regions . ... Average annual indices . ... December . ... December, 1997 . Visual indices of solar activity by National Geophysical Data Center . ... Average . ...
Statistics of sunspot activity . The sunspot indices . ... NGDC's observations . The solar regions . ... Average annual indices . ... Solar activity in 1997 . Visual indices of solar activity by National Geophysical Data Center . Average by . ... 0.00 . ...
Statistics of sunspot activity . The sunspot indices . ... NGDC's observations . The solar regions . ... Average annual indices . ... November . ... November, 1997 . Visual indices of solar activity by National Geophysical Data Center . ... Average . ...
Statistics of sunspot activity . The sunspot indices . ... NGDC's observations . The solar regions . ... Average annual indices . ... October . ... October, 1997 . Visual indices of solar activity by National Geophysical Data Center . ... Average . ...
Statistics of sunspot activity . The sunspot indices . ... NGDC's observations . The solar regions . ... Average annual indices . ... September . ... September, 1997 . Visual indices of solar activity by National Geophysical Data Center . ... Average . ...
Statistics of sunspot activity . The sunspot indices . ... NGDC's observations . The solar regions . ... Average annual indices . ... August . ... August, 1997 . Visual indices of solar activity by National Geophysical Data Center . ... Average . ...
Statistics of sunspot activity . The sunspot indices . ... NGDC's observations . The solar regions . ... Average annual indices . ... July . ... July, 1997 . Visual indices of solar activity by National Geophysical Data Center . ... Average . ...
Statistics of sunspot activity . The sunspot indices . ... NGDC's observations . The solar regions . ... Average annual indices . ... June . ... June, 1997 . Visual indices of solar activity by National Geophysical Data Center . ... Average . ...
Statistics of sunspot activity . The sunspot indices . ... NGDC's observations . The solar regions . ... Average annual indices . ... May, 1997 . Visual indices of solar activity by National Geophysical Data Center . ... Average . ... 0.00 . ...
Statistics of sunspot activity . The sunspot indices . ... NGDC's observations . The solar regions . ... Average annual indices . ... April . ... April, 1997 . Visual indices of solar activity by National Geophysical Data Center . ... Average . ...
Statistics of sunspot activity . The sunspot indices . ... NGDC's observations . The solar regions . ... Average annual indices . ... March . ... March, 1997 . Visual indices of solar activity by National Geophysical Data Center . ... Average . ...
Statistics of sunspot activity . The sunspot indices . ... NGDC's observations . The solar regions . ... Average annual indices . ... February . ... February, 1997 . Visual indices of solar activity by National Geophysical Data Center . ... Average . ...
Statistics of sunspot activity . The sunspot indices . ... NGDC's observations . The solar regions . ... Average annual indices . January . ... January, 1997 . Visual indices of solar activity by National Geophysical Data Center . ... Average . ...
Statistics of sunspot activity . The sunspot indices . ... NGDC's observations . The solar regions . ... Average annual indices . ... Solar activity in 2006 . Visual indices of solar activity by National Geophysical Data Center . Average by . ... 0.00 . ...
Statistics of sunspot activity . The sunspot indices . ... Visual indices of solar activity . ... n - number of spot groups . A - Waldmeier class of unipolar spot groups without penumbra . B - class of bipolar spot groups without penumbra . C - class of bipolar spot groups with one penumbra pole . D - class of small bipolar spot groups with two penumbra poles . E - class of middle bipolar spot groups with two penumbra poles . ... H - class of unipolar penumbrated spot groups . ...