Data Science Journal
Online ISSN : 1683-1470
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Analysis on the Temporal-Spatial Distribution of the Geomagnetic Activity Index Vr
Ya-Hong YuanDong-Mei YangHua-Ran ChenYu-Fei HeChuan-Hua Chen
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2011 年 10 巻 p. IAGA34-IAGA40

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Based on the analysis of the Vr index from data from geomagnetic observatories in China and four geomagnetic observatories abroad, temporal-spatial distribution characteristics of Vr index were analyzed. The Vr index showed 27-day solar-cycle recurrences and significant seasonal variation. It also increased with latitude. Meanwhile, both local-time dependence and an obvious dusk-dawn asymmetry existed, which might be related to the asymmetric ring current, the partial ring current, and the field-aligned current.

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