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Dataset released under the open data policy
Abstract: World Data Center SILSO, Sunspot Index and Long-term Solar Observations , 1 - 12/2016
Note: Total, North, South, daily, monthly mean, monthly smoothed, yearly mean sunspot number time series (1700 to present)
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The record appears in these collections:
Royal Observatory of Belgium > Solar Physics & Space Weather (SIDC)
Solar-Terrestrial Centre of Excellence
Datasets