Find out what the Maunder minimum is and when it was established.
©Jupiter Images, 2010 The Maunder minimum is named after E. Walter Maunder.
The Maunder minimum was the time between 1645 and 1715 when sunspots were very scarce or missing entirely. From studying old solar records in 1890, E. Walter Maunder observed that sunspot activity during these years was at a minimum. This observation was confirmed in 1976 by John Eddy.
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