English: The solar cycle, as seen in variations of the sunspot number index. Three historical reconstruction are shown, namely the monthly sunspot number (orange), and yearly sunspot number (red), and, from 1610 to 1750, the Group sunspot number (green), generally deemed a more reliable reconstruction over this time interval.
2007-06-10 06:18 凌雲 800×400× (18143 bytes) The solar cycle, as seen in variations of the sunspot number index. Three historical reconstruction are shown, namely the monthly sunspot number (orange), and yearly sunspot number (red), and, from 1610 to 1750, the Group sunspot number (green), generally
2008-07-30 09:00 Slashme 800×400× (18359 bytes) Give white background, change green to blue.
2007-05-31 13:22 Paulchar 800×400× (18143 bytes) Author: Paul Charbonneau, Physics Dept. Universite de Montreal; generated from publicly available data (http://sidc.oma.be).