Motion of aurorae

Christopher C. Chaston, Kanako Seki, Takeshi Sakanoi, Kazushi Asamura, Masafumi Hirahara

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

Using high resolution auroral imagery and particle measurements from the Reimei spacecraft we distinguish 'Alfvénic' and 'quasi-static' auroral forms and implement a new multi-scale wavelet analysis technique to examine how the vorticity in these forms varies as a function of scale transverse to the geomagnetic field. We find from this analysis that the complex motions of aurorae can be described by power-laws relating spatial scale to optical vorticity. We demonstrate how these relationships naturally arise from the 'conductance' of geomagnetic field-lines and the physics of Alfvén waves.

Original languageEnglish
Article numberL08104
JournalGeophysical Research Letters
Volume37
Issue number8
DOIs
Publication statusPublished - 2010 Apr

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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