Fig. 1From: Records of sunspot and aurora during CE 960–1279 in the Chinese chronicle of the Sòng dynastyChange of the number of white vapor, red vapor, and black spots during the Sòng dynasty: The bars in blue and red represent the number of candidates of white and red aurora, respectively. The black dots are for the total number of aurora candidates. The crosses show the number of sunspotsBack to article page