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Abstract
Understanding the motion of charged particles in the electromagnetic field in the inner magnetosphere is essential for space science and space weather. Charge accumulation can occur due to the dipole magnetic and convective electric fields in this region. However, until the recent Magnetospheric Multiscale (MMS) mission, there were few means to detect charge distribution in situ. We report unambiguous in situ observation of the spatial distribution of the excess charge density in the inner magnetosphere by the MMS mission. We find that a positive (negative) charge accumulates in the dusk (dawn) side inner magnetospheres, which is contrary to the long assumed overall quasi-neutrality of space plasma. These observations and results offer insight into magnetosphere–ionosphere coupling.
Department
Space Science Center
Publication Date
2-24-2024
Journal Title
Communications Physics
Publisher
Springer Science and Business Media LLC
Digital Object Identifier (DOI)
Document Type
Article
Recommended Citation
Gao, L., Shen, C., Zhou, Y. et al. Observational features of charge distribution in Earth’s inner magnetosphere. Commun Phys 7, 63 (2024). https://doi.org/10.1038/s42005-024-01553-5
Comments
This is an open access article published by Springer Science and Business Media LLC in Communications Physics in 2024, available online: https://dx.doi.org/10.1038/s42005-024-01553-5