Fig. 3From: Records of sunspot and aurora during CE 960–1279 in the Chinese chronicle of the Sòng dynastyComparison the change of 14C in tree ring and the number of auroras. Miyake (2012) pointed out the spiky peak of 14C at CE 774 (right). In Chinese chronicle, after CE 774, the number of observations of auroras increased. Between CE 985 and 1025, only in CE 1005 was the observation of sunspots recordedBack to article page