Abstract A long database of corotating interaction regions (CIRs) is used to investigate their geoeffectiveness. Among 290 CIR events identified during Solar Cycle 24 (2008–2019), 88 (30%) are found to be geoeffective in causing geomagnetic storms with the symmetric ring current index [SYM-H] peak - 50 nT, and 202 (70%) are non-geoeffective with the minimum SYM-H > - 50 nT. Based on a comparative study of the geoeffective and non-geoeffective CIRs, following results are obtained. Geoeffective and non-geoeffective CIRs have comparable duration ( 28 ± 15 hours, 26 ± 14 hours, respectively) and radial extent ( 0.33 ± 0.17 AU, 0.30 ± 0.17 AU, respectively), on average. While the mean solar-wind plasma speed during the geoeffective ( 503 ± 70 km s−1) and non-geoeffective ( 491 ± 63 km s−1) CIRs exhibits no statistical difference, the geoeffective CIRs have 25 % higher peak plasma density, 45 % higher ram pressure, 42 % higher temperature, 39 % higher interplanetary magnetic field (IMF) magnitude, 57 % stronger IMF southward component, and 61 % stronger reconnection electric field than the non-geoeffective events, on average. The auroral electrojet index [AE] and SYM-H are found to be, respectively, 58 % and 192 % stronger during the geoeffective CIRs than the non-geoeffective events. The typical characteristic solar-wind and geomagnetic activity parameters given in this article can be useful for space weather modeling and prediction purposes.


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    Titel :

    A comparative study on geoeffective and non-geoeffective corotating interaction regions


    Beteiligte:
    Sunny, Jibin V. (Autor:in) / Nair, Archana Giri (Autor:in) / Babu, Megha (Autor:in) / Hajra, Rajkumar (Autor:in)

    Erschienen in:

    Advances in Space Research ; 71 , 1 ; 268-274


    Erscheinungsdatum :

    2022-09-22


    Format / Umfang :

    7 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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