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| Titel |
A statistical study on the timescales involved into the solar wind-magnetosphere interaction during the March 17, 2015 storm |
| VerfasserIn |
Tommaso Alberti, Giuseppe Consolini, Fabio Lepreti, Antonio Vecchio, Vincenzo Carbone |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250128433
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| Publikation (Nr.) |
 EGU/EGU2016-8421.pdf |
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| Zusammenfassung |
| The magnetospheric dynamics in response to solar wind changes in the course of magnetic
substorms and storms can be investigated via a set of geomagnetic indices, which monitor the
changes of some of the most important current systems: the Auroral Electrojet indices (AE,
AU, AL and AO) and the low latitude geomagnetic ones (Dst, Sym-H, ...). The variations of
these indices are, indeed, associated with the changes of the auroral electrojets and ring
current systems during geomagnetic substorms and storms. In this work, we present a case
study of the relevant timescales responsible for coupling between the solar wind changes and
the magnetospheric response during the St. Patrick’s Day Geomagnetic Storm of 2015, by
investigating the behavior of the IMF-Bz component and the AE, AL and Sym-H
indices at different timescales using the Empirical Mode Decomposition (EMD).
Indeed, the EMD allows us to extract the intrinsic oscillations (modes) present
into the different datasets. The relevance of the different timescales in the solar
wind-magnetosphere coupling is further investigated by means of the Delayed Mutual
Information (DMI). |
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