ダルトン極小期
A detailed analysis with the auroral and solar data has been given by Wilfried Schröder, N. N. Shefov in a paper in Ann. Geophys. 2004. Also details can be found in Wilfried Schröder, Das Phänomen des Polarlichts(The Aurora in Time), Darmstadt, Wissenschaftliche Buchgeselllschaft 1984, and Science Edition, Bremen, 2000.