Tv Observations of Auroral Arcs

  1. S.-I. Akasofu and
  2. J.R. Kan
  1. Takasi Oguti

Published Online: 26 MAR 2013

DOI: 10.1029/GM025p0031

Physics of Auroral Arc Formation

Physics of Auroral Arc Formation

How to Cite

Oguti, T. (1981) Tv Observations of Auroral Arcs, in Physics of Auroral Arc Formation (eds S.-I. Akasofu and J.R. Kan), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM025p0031

Author Information

  1. Geophysics Research Laboratory, University of Tokyo, Tokyo 113, Japan

Publication History

  1. Published Online: 26 MAR 2013
  2. Published Print: 1 JAN 1981

ISBN Information

Print ISBN: 9780875900506

Online ISBN: 9781118664360



  • Auroras—Addresses, essays, lectures


From the dynamical view point of aurora, it is shown that the discrete aurora so far called, especially in the dusk to the midnight sectors, is a clockwise (viewed along the magnetic field) vortex chain or a shear, including splitting, and that the diffuse aurora, though called so higherto, actually consists of pulsating structures with a diffuse background, especially in the dawn sectors. It is also shown that the transient auroral forms, such as swirling smoke like auroras and highly striated auroras that show both rotational motions and pulsations are often seen on equatorward expanding branches of aurora during an auroral expansion in the midnight sector.