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Spörer minimum




A period of low sunspot activity that lasted from about AD 1420 to 1570, based on evidence such as carbon-14 in tree rings and records of auroral activity. The Spörer minimum, and the similar Maunder minimum, coincide with a period of low global temperatures known as the Little Ice Age. It was discovered by the American solar physicist John Allen Eddy (1931–) who named it after Gustav Spörer.


Related category

   • SOLAR TOPICS