Substorms and Solar Eclipses: A Mutual Information Based Study

Coyle, S.E.; Baker, J.B.H.; Chakraborty, S.; Hartinger, M. D.; Freeman, M.P. ORCID:; Clauer, C.R.; Xu, Z.; Weimer, D.R.. 2023 Substorms and Solar Eclipses: A Mutual Information Based Study. Geophysical Research Letters, 50 (24), e2023GL106432. 7, pp.

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Solar eclipses present a rare glimpse into the impact of ionospheric electrodynamics on the magnetosphere independent of other well studied seasonal influences. Despite decades of study, we still do not have a complete description of the conditions for geomagnetic substorm onset. We present herein a mutual information based study of previously published substorm onsets and the past two decades of eclipses which indicates the likelihood of co-occurrence is greater than random chance. A plausible interpretation for this relation suggests that the abrupt fluctuations in ionospheric conductivity during an eclipse may influence the magnetospheric preconditions of substorm initiation. While the mechanism remains unclear, this study presents strong evidence of a link between substorm onset and solar eclipses.

Item Type: Publication - Article
Digital Object Identifier (DOI):
ISSN: 0094-8276
Additional Keywords: solar eclipse, substorm, mutual information, conductivity
Date made live: 29 Dec 2023 09:14 +0 (UTC)

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