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Research Papers

Analysis on the Temporal-Spatial Distribution of the Geomagnetic Activity Index Vr

Authors
  • Ya-Hong Yuan
  • Dong-Mei Yang
  • Hua-Ran Chen
  • Yu-Fei He
  • Chuan-Hua Chen

Abstract

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.
Year: 2011
Volume 10
Page/Article: IAGA34-IAGA40
DOI: 10.2481/dsj.IAGA-06
Published on Jun 22, 2011
Peer Reviewed