How Can Propagation Speed of Interplanetary Shocks Affect the Radiation Belts Dynamic: A Comparative Observational and Statistical Investigation
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Le résumé fourni par la source
Abstract Relativistic electron dynamics in Earth's radiation belts are significantly influenced by interplanetary shocks (IPSs) associated with coronal mass ejections. We show that the propagation speed of an IPS controls the motion of the induced impulsive electric field. This field then drives the resonant “drift‐in‐phase” acceleration of relativistic electrons. As a consequence, the relativistic electron energy with the maximum variation of residual flux observed is determined by the IPS propagation speed, which contrasts with the traditional assumption that fast magnetosonic wave speed controls the resonance. To validate this hypothesis, we compare two IPS‐driven radiation belt enhancement events with distinct shock speeds and perform a statistical analysis of 39 IPS events observed from 2013 to 2018. The case studies and statistical results consistently show that the drift velocity of electrons at the energy of peak flux enhancement correlates much more strongly with the IPS shock speed than with the localized fast magnetosonic wave speed in the inner magnetosphere. These findings provide the first comprehensive observational confirmation that IPS propagation speed is the key parameter governing “drift‐in‐phase” acceleration of radiation belt electrons. This insight emphasizes the importance of IPS kinematics in radiation belt modeling and could improve the forecasting of shock‐induced energetic electron enhancements.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- How Can Propagation Speed of Interplanetary Shocks Affect the Radiation Belts Dynamic: A Comparative Observational and Statistical Investigation
- Date Crossref
- 01/11/2025
- Éditeur
- American Geophysical Union (AGU)
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Beihang University International Institute for Interdisciplinary and Frontiers pays non établi dans la noticeUniversité ou école supérieure
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University of Colorado Boulder Laboratory for Atmospheric and Space Physics pays non établi dans la noticeUniversité ou école supérieure
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Laboratory for Atmospheric and Space Physics pays non établi dans la noticeStructure de recherche
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Democritus University of Thrace Department of Electrical and Computer Engineering pays non établi dans la noticeUniversité ou école supérieure
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Beijing International Studies University pays non établi dans la noticeUniversité ou école supérieure
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School of Space and Earth Science pays non établi dans la noticeUniversité ou école supérieure
International Institute for Interdisciplinary and Frontiers — Beihang University, Laboratory for Atmospheric and Space Physics — University of Colorado Boulder et Laboratory for Atmospheric and Space Physics, avec 3 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.