Interhemispheric Asymmetries in the Ground Magnetic Response to Interplanetary Shocks: The Role of Shock Impact Angle

Z. Xu*, M. D. Hartinger, D. M. Oliveira, S. Coyle, C. R. Clauer, D. Weimer, T. R. Edwards

*Corresponding author for this work

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    Abstract

    Interplanetary (IP) shocks drive magnetosphere‐ionosphere (MI) current systems that in turn are associated with ground magnetic perturbations. Recent work has shown that IP shock impact angle plays a significant role in controlling the subsequent geomagnetic activity and magnetic perturbations; for example, highly inclined shocks drive asymmetric MI responses due to interhemispherical asymmetric magnetospheric compressions, while almost head‐on shocks drive more symmetric MI responses. However, there are few observations confirming that inclined shocks drive such asymmetries in the high‐latitude ground magnetic response. We use data from a chain of Antarctic magnetometers, combined with magnetically conjugate stations on the west coast of Greenland, to test these model predictions (Oliveira & Raeder, 2015, https://doi-org.proxy.findit.dtu.dk/10.1002/2015JA021147; Oliveira, 2017, https://doi-org.proxy.findit.dtu.dk/10.1007/s13538-016-0472-x).
    Original languageEnglish
    JournalSpace Weather
    Volume18
    Issue number3
    ISSN1542-7390
    DOIs
    Publication statusPublished - 2020

    Bibliographical note

    This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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