Articles | Volume 35, issue 5
Regular paper
07 Sep 2017
Regular paper |  | 07 Sep 2017

Statistical study of auroral omega bands

Noora Partamies, James M. Weygand, and Liisa Juusola

Data sets

MIRACLE ASC quicklook data FMI

Dst index data Kyoto World Data Center

Short summary
Large-scale undulations of the diffuse aurora boundary, auroral omega bands, have been studied based on 438 omega-like structures identified over Fennoscandian Lapland from 1996 to 2007. The omegas mainly occurred in the post-magnetic midnight sector, in the region between oppositely directed ionospheric field-aligned currents, and during substorm recovery phases. The omega bands were observed during substorms, which were more intense than the average substorm in the same region.