influences on the radius of the auroral oval

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ID: 217794
2009
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Abstract
We examine the variation in the radius of the auroral oval, as measured from auroral images gathered by the Imager for Magnetopause-to-Aurora Global Exploration (IMAGE) spacecraft, in response to solar wind inputs measured by the Advanced Composition Explorer (ACE) spacecraft for the two year interval June 2000 to May 2002. Our main finding is that the oval radius increases when the ring current, as measured by the Sym-H index, is intensified during geomagnetic storms. We discuss our findings within the context of the expanding/contracting polar cap paradigm, in terms of a modification of substorm onset conditions by the magnetic perturbation associated with the ring current.
Reference Key
milan2009annalesinfluences Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;S. E. Milan;J. Hutchinson;P. D. Boakes;P. D. Boakes;B. Hubert
Journal journal of food measurement and characterization
Year 2009
DOI
10.5194/angeo-27-2913-2009
URL
https://www.ann-geophys.net/27/2913/2009/angeo-27-2913-2009.pdf
Keywords
cosmic physics sciencephysicsgeophysics

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