Maunder Minimum

The Maunder Minimum (also known as the prolonged sunspot minimum) is the name used for the period starting in about 1645 and continuing to about 1715 when sunspots became exceedingly rare, as noted by solar observers of the time.

The concept became notable after John A. Eddy published a landmark 1976 paper in Science titled "The Maunder Minimum". Astronomers before Eddy had also named the period after the solar astronomer Edward W. Maunder (1851–1928) who studied how sunspot latitudes changed with time. The periods he examined included the second half of the 17th century. Edward Maunder published two papers in 1890 and 1894, and he cited earlier papers written by Gustav Spörer.

Like the Dalton Minimum and Spörer Minimum, the Maunder Minimum coincided with a period of lower-than-average European temperatures.

During one 30-year period within the Maunder Minimum, astronomers observed only about 50 sunspots, as opposed to a more typical 40,000–50,000 spots in modern times.

Read more about Maunder Minimum:  Sunspot Observations, Little Ice Age, Other Observations

Other articles related to "maunder minimum, minimum":

Maunder Minimum - Other Observations
... was born a year before the start of the Maunder Minimum ... These indicate lower solar activity during the Maunder Minimum ... in tree rings these include the Spörer Minimum (1450–1540), and less markedly the Dalton Minimum (1790–1820) ...
Spörer Minimum
... The Spörer Minimum was a 90-year span of low solar activity, from about 1460 until 1550, which was identified and named by John A ... Eddy in a landmark 1976 paper published in Science titled "The Maunder Minimum" ... events and approximate dates Event Start End Oort minimum 1050 ... Oort minimum (see Medieval Warm Period) 1080 ... Medieval maximum (see Medieval Warm Period) 1250 ... Wolf minimum 1350 ... Sp ...

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