What is it about?
We have analysed correlations between sunspot numbers, solar wind, ion density, interplanetary magnetic field vis-à-vis magnetic activity. Planetary geomagnetic index (Ap) and local residual measure of magnetic activity (IΔH) from low-latitude Magnetic Observatory, CSIR-NGRI, Hyderabad (IMO-HYB) spanning solar cycles 21–23 are used for this study.
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Perspectives
The demonstrated correlation or lack of it, between measures of magnetic activity (Ap and IΔH), and all the parameters of solar activity, presented here corroborate established mechanisms as well as delineated clearly the relative impact of different solar mechanisms over phases of three solar cycles. The possible role of non-sunspot related activity from high latitude regions of the sun is indicated.
Dr Nelapatla Phani Chandrasekhar
NATIONAL GEOPHYSICAL RESEARCH INSTITUTE
Read the Original
This page is a summary of: Correlations between sunspot numbers, interplanetary parameters and geomagnetic trends over solar cycles 21–23, Journal of Atmospheric and Solar-Terrestrial Physics, July 2014, Elsevier,
DOI: 10.1016/j.jastp.2014.04.001.
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