Alternate Definitions for sunspot number

exclude archived terms
Term: sunspot number
Definition:

A daily index of sunspot activity (R), defined as R = k(10g + s) where s = number of individual spots, g = number of sunspot groups, and k is an observatory factor (equal to 1 for the Zurich Observatory and adjusted for all other observatories to obtain approximately the same R number). The standard number, RI, once derived at Zurich (see Wolf number), is now being derived at Brussels and is denoted by RI. Often, the term ”sunspot number” is used in reference to the widely distributed smoothed sunspot number.

Created 2023.04.16
Last Modified 2023.04.16
Contributed by Ryan McGranaghan
Permalink:
https://n2t.net/ark:/99152/h10023
Term: sunspot number
Definition:
Created 2023.04.16
Last Modified 2023.04.16
Contributed by Ryan McGranaghan
Permalink:
https://n2t.net/ark:/99152/h19434