Correlation between Solar Semi-Diameter and Geomagnetic Time Series

Eugênio Reis Neto, Vitor Hugo Alves Dias, Andrés Reinaldo Rodriguez Papa, Alexandre Humberto Andrei, Jucira Lousada Penna, Irineu Figueiredo, Sérgio Calderari Boscardin, Victor de Amorin d’Ávila

Observatório Nacional, Rio de Janeiro, Brazil.

DOI: 10.4236/ijg.2012.32034                

Abstract

We study the correlation between geomagnetic and solar semi-diameter measurements made at two of our ground stations (Vassouras and Rio de Janeiro, Brazil). The study comprises the period from March 1998 to November 2003, for which daily means were compared. Both series describe correlated, but different, phenomena and, consequently, before a correlation study, an individual analysis of each data set was necessary. One of the motivations of the present work was to further explore the correlation with lags found between the solar semi-diameter and some solar activity estimators, which supports the probabilistic forecasting of the solar activity and hence, of the solar driven geomagnetic variations.

Keywords

Solar Diameter; Geomagnetic Series; Correlation; Time Series

Conflicts of Interest

The authors declare no conflicts of interest.

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