Monthly Mean Relative Sunspot Numbers

Usage

data(sunspots)

Format

A time series of monthly data from 1749 to 1983.

Description

Monthly sunspot numbers from 1749 to 1983. Collected at Swiss Federal Observatory, Zurich until 1960, then Tokyo Astronomical Observatory.

Source

D. F. Andrews and A. M. Herzberg (1985). Data: A Collection of Problems from Many Fields for the Student and Research Worker. New York: Springer-Verlag.


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