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| Titel |
The latitudinal distribution of the baseline geomagnetic field during the March 17, 2015 geomagnetic storm |
| VerfasserIn |
Tommaso Alberti, Mirko Piersanti, Fabio Lepreti, Antonio Vecchio, Paola De Michelis, Umberto Villante, 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 |
250126644
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| Publikation (Nr.) |
 EGU/EGU2016-6396.pdf |
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| Zusammenfassung |
| Geomagnetic storms (GS) are global geomagnetic disturbances that result from the
interaction between magnetized plasma that propagates from the Sun and plasma and
magnetic fields in the near-Earth space plasma environment. The Dst (Disturbance Storm
Time) global Ring Current index is still taken to be the definitive representation for
geomagnetic storm and is used widely by researcher. Recent in situ measurements by
satellites passing through the ring-current region (i.e. Van Allen probes) and computations
with magnetospheric field models showed that there are many other field contributions on the
geomagnetic storming time variations at middle and low latitudes. Appling the Empirical
Mode Decomposition [Huang et al., 1998] to magnetospheric and ground observations, we
detect the different magnetic field contributions during a GS and introduce the concepts of
modulated baseline and fluctuations of the geomagnetic field. In this work, we apply
this method to study the latitudinal distribution of the baseline geomagnetic field
during the St. Patrick’s Day Geomagnetic Storm 2015 in order to detect physical
informations concerning the differences between high-latitude and equatorial ground
measurements. |
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