Open AccessInferring interplanetary magnetic field polarities from geomagnetic variations
Author(s) -
Vokhmyanin M. V.,
Ponyavin D. I.
Publication year - 2012
Publication title -
journal of geophysical research: space physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/2011ja017060
Subject(s) - earth's magnetic field , polarity (international relations) , interplanetary magnetic field , interplanetary spaceflight , polar , geophysics , physics , solar wind , geology , magnetic field , astronomy , quantum mechanics , cell , biology , genetics
In this paper, we propose a modified procedure to infer the interplanetary magnetic field (IMF) polarities from geomagnetic observations. It allows to identify the polarity back to 1905. As previous techniques it is based on the well‐known Svalgaard‐Mansurov effect. We have improved the quality and accuracy of polarity inference compared with the previous results of Svalgaard (1975) and Vennerstroem et al. (2001) by adding new geomagnetic stations and extracting carefully diurnal curve. The data demonstrates an excess of one of the two IMF sectors within equinoxes (Rosenberg‐Coleman rule) evidencing polar field reversals at least for the last eight solar cycles. We also found a predominance of the two‐sector structure in late of descending phase of solar cycle 16.