Spörer minimum A period of low sunspot activity that lasted from about A.D. 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 Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) |