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Title: REVERSALS OF GNEVYSHEV-OHL RULE

We perform an analysis of the number of sunspot groups in activity cycles from 1610 through the present. Here we use the G{sub n} index, which is defined as the average daily number of sunspot groups in cycle n. There is a high positive correlation between the parameter G{sub n} in the current cycle and an analogous parameter in the following cycle G{sub n{sub +1}} both for pairs of even-odd cycles and odd-even activity cycles. In cycle Nos. 10-21 for pairs of even-odd cycles, the ratio of parameter G{sub n} corresponds to the GO rule G{sub n{sub +1}{sup odd}}/G{sub n}{sup even}>1. However, during the period {approx}1745-1850, odd cycles were less than the preceding even cycles G{sub n{sub +1}{sup odd}}/G{sub n}{sup even}<1. The ratio of the parameter G{sub n{sub +1}{sup odd}}/G{sub n}{sup even} has a long-term variation within the range 0.5-1.5 with a period of about 21 activity cycles, and it proves the reversal of the GO rule.
Authors:
 [1]
  1. Kislovodsk Mountain Astronomical Station of Pulkovo Observatory, Gagarina Str. 100, Kislovodsk 357700 (Russian Federation)
Publication Date:
OSTI Identifier:
22140304
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 772; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CORRELATIONS; SUN; SUNSPOTS