On 12 May 2021 the interplanetary doppelganger of the 9 May 2021 coronal mass ejection impacted the Earth's magnetosphere, giving rise to a strong geomagnetic storm. This paper discusses the evolution of the various events linking the solar activity to the Earth's ionosphere with special focus on the effects observed in the circumterrestrial environment. We investigate the propagation of the interplanetary coronal mass ejection and its interaction with the magnetosphere-ionosphere system in terms of both magnetospheric current systems and particle redistribution, by jointly analyzing data from interplanetary, magnetospheric, and low Earth orbiting satellites. The principal magnetospheric current system activated during the different phases of the geomagnetic storm was correctly identified through the direct comparison between geosynchronous orbit observations and model predictions. From the particle point of view, we have found that the primary impact of the storm development is a net and rapid loss of relativistic electrons from the entire outer radiation belt. Our analysis shows no evidence for any short-term recovery to pre-storm levels during the days following the main phase. Storm effects also included a small Forbush decrease driven by the interplay between the interplanetary shock and subsequent magnetic cloud arrival.

Piersanti, M., Del Moro, D., Parmentier, A., Martucci, M., Palma, F., Sotgiu, A., et al. (2022). On the magnetosphere-ionosphere coupling during the May 2021 geomagnetic storm. SPACE WEATHER, 20(6) [10.1029/2021SW003016].

On the magnetosphere-ionosphere coupling during the May 2021 geomagnetic storm

Del Moro, D;Parmentier, A;Martucci, M;Palma, F;Sotgiu, A;Berrilli, F;Giovannelli, L;De Santis, C;Sparvoli, R;Picozza, P
2022

Abstract

On 12 May 2021 the interplanetary doppelganger of the 9 May 2021 coronal mass ejection impacted the Earth's magnetosphere, giving rise to a strong geomagnetic storm. This paper discusses the evolution of the various events linking the solar activity to the Earth's ionosphere with special focus on the effects observed in the circumterrestrial environment. We investigate the propagation of the interplanetary coronal mass ejection and its interaction with the magnetosphere-ionosphere system in terms of both magnetospheric current systems and particle redistribution, by jointly analyzing data from interplanetary, magnetospheric, and low Earth orbiting satellites. The principal magnetospheric current system activated during the different phases of the geomagnetic storm was correctly identified through the direct comparison between geosynchronous orbit observations and model predictions. From the particle point of view, we have found that the primary impact of the storm development is a net and rapid loss of relativistic electrons from the entire outer radiation belt. Our analysis shows no evidence for any short-term recovery to pre-storm levels during the days following the main phase. Storm effects also included a small Forbush decrease driven by the interplay between the interplanetary shock and subsequent magnetic cloud arrival.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/06 - Fisica per il Sistema Terra e Il Mezzo Circumterrestre
English
coronal mass ejection propagation; geomagnetic storm; magnetospheric current systems; magnetospheric particles distribution; solar wind; magnetosphere; ionosphere coupling; space weather
ASI-INAF n.2020-35-HH.0, 2020-31-HH.0
Piersanti, M., Del Moro, D., Parmentier, A., Martucci, M., Palma, F., Sotgiu, A., et al. (2022). On the magnetosphere-ionosphere coupling during the May 2021 geomagnetic storm. SPACE WEATHER, 20(6) [10.1029/2021SW003016].
Piersanti, M; Del Moro, D; Parmentier, A; Martucci, M; Palma, F; Sotgiu, A; Plainaki, C; D'Angelo, G; Berrilli, F; Recchiuti, D; Papini, E; Giovannelli, L; Napoletano, G; Iuppa, R; Diego, P; Cicone, A; Merge, M; De Donato, C; De Santis, C; Sparvoli, R; Ubertini, P; Battiston, R; Picozza, P
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/303679
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