Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 39, issue 1
Articles | Volume 39, issue 1
https://doi.org/10.5194/angeo-39-181-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-39-181-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 39, issue 1
ANGEO Communicates
 | 
24 Feb 2021
ANGEO Communicates |  | 24 Feb 2021

Seasonal dependence of the Earth's radiation belt – new insights

Rajkumar Hajra

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Latest update: 29 Jun 2024
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Short summary
Geomagnetic activity is known to exhibit semi-annual variation with larger occurrences during equinoxes. A similar seasonal feature was reported for relativistic (∼ MeV) electrons throughout the entire outer zone radiation belt. Present work, for the first time reveals that electron fluxes increase with an ∼ 6-month periodicity in a limited L-shell only with large dependence in solar activity cycle. In addition, flux enhancements are not essentially equinoctial.
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