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Agora – Historical space weather events and observations

Table 1

Summary of the names, intervals (onset and end), and references for known prolonged minima. Intervals have been adopted from Usoskin et al. (2007) for the three prolonged minima before 1610 and from Usoskin et al. (2015) for the Maunder Minimum. References have been abbreviated as YSTCC (the Yosemite Solar Terrestrial Coupling Conference in 1978), E76 (Eddy, 1976), SQ80 (Stuiver & Quay, 1980), and SG80 (Stuiver & Grootes, 1980).

Name Onset End Origin Reference
Dalton Minimum 1797 1827 John Dalton YSTCC
Maunder Minimum 1645 1715 Edward Maunder E76
Spörer Minimum 1390 1550 Gustav Spörer E76
Wolf Minimum 1280 1350 Rudolf Wolf SQ80
Oort Minimum 1010 1050 Jan Oort SG80

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