AbstractSolar wind driving can cause a variety of different responses in the magnetosphere. Strong and steady driving during geomagnetic storms may result in sawtooth events. Strong to moderate driving may be followed by either sawtooth events or steady magnetospheric convection (SMC) events. Lower solar wind energy input typically leads to the formation of isolated non-storm substorms. This study uses superposed epoch analysis to reveal the typical properties of these three event groups as well as their similarities and differences. We use IMF and solar wind parameters, as well as ground-based indices (AL, SYM-H, ASY-H, PCN) to examine the level of solar wind driving and its response in the magnetosphere. Our results show that sawtooth events are associated with the strongest ionospheric activity. The subgroups of events during constant solar wind E Y show that the key difference between the events is the average solar wind speed. Particularly, the high activity during sawtooth events is driven by high solar wind speed, while the lowest average speed during the SMCs may explain the lack of substorm activity during the steady convection periods.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Statistical survey on sawtooth events, SMCs and isolated substorms


    Contributors:

    Published in:

    Advances in Space Research ; 44 , 3 ; 376-384


    Publication date :

    2009-03-19


    Size :

    9 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





    Electromagnetic design of a novel hybrid flux SMCs PMSM

    Shanlin, Jiang / Jianhui, Hu / Baochao, Wang et al. | IEEE | 2017


    Predicting substorms

    Siscoe, G. L. / Maynard, N. C. | British Library Online Contents | 1996



    Dissipation to the Joule Heating: Isolated and Stormtime Substorms

    Tanskanen, E. / Koskinen, H. E. J. / Pulkkinen, T. I. et al. | British Library Conference Proceedings | 2002