Auroral Substorms Observed by UV-Imager on Akebono

  1. Joseph R. Kan,
  2. Thomas A. Potemra,
  3. Susumu Kokubun and
  4. Takesi Iijima
  1. Eisuke Kaneda and
  2. Tatsundo Yamamoto

Published Online: 19 MAR 2013

DOI: 10.1029/GM064p0235

Magnetospheric Substorms

Magnetospheric Substorms

How to Cite

Kaneda, E. and Yamamoto, T. (1991) Auroral Substorms Observed by UV-Imager on Akebono, in Magnetospheric Substorms (eds J. R. Kan, T. A. Potemra, S. Kokubun and T. Iijima), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM064p0235

Author Information

  1. Department of Earth and Planetary Physics, University of Tokyo, Bunkyo-Ku, Tokyo 113, Japan

Publication History

  1. Published Online: 19 MAR 2013
  2. Published Print: 1 JAN 1991

ISBN Information

Print ISBN: 9780875900308

Online ISBN: 9781118663981



  • Magnetospheric substorms—Congresses


We have studied global aurora dynamics by the analyses of high time resolution UV-images acquired on the AKEBONO satellite. The substorm expansion onset is one of challenging targets in studies of global aurora dynamics. It is confirmed that the expansion onset is constituted by succeeding two stages. The first stage is the initial brightening within a localized region of 1 hour longitudinal extent and continues for several minutes. The succeeding one is the flaring-up, which follows the former and accompanies breakup aurora displays including bulge-surge formation.