Articles | Volume 34, issue 11
https://doi.org/10.5194/angeo-34-1069-2016
https://doi.org/10.5194/angeo-34-1069-2016
Regular paper
 | 
22 Nov 2016
Regular paper |  | 22 Nov 2016

Identification of the different magnetic field contributions during a geomagnetic storm in magnetospheric and ground observations

Tommaso Alberti, Mirko Piersanti, Antonio Vecchio, Paola De Michelis, Fabio Lepreti, Vincenzo Carbone, and Leonardo Primavera

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We investigate the time variation of the magnetospheric and Earth's magnetic field during both quiet and disturbed periods. We identify the timescale variations associated with different magnetospheric current systems, solar-wind–magnetosphere high-frequency interactions, ionospheric processes, and internal dynamics of the magnetosphere. In addition, we propose a new local index for the identification of the intensity of a geomagnetic storm on the ground.