Scale size‐dependent characteristics of the nightside aurora

  title={Scale size‐dependent characteristics of the nightside aurora},
  author={B. K. Humberset and Jesper W. Gjerloev and Marilia Samara and Robert G Michell},
  journal={Journal of Geophysical Research: Space Physics},
  pages={2455 - 2466}
We have determined the spatiotemporal characteristics of the magnetosphere‐ionosphere (M‐I) coupling using auroral imaging. Observations at fixed positions for an extended period of time are provided by a ground‐based all‐sky imager measuring the 557.7 nm auroral emissions. We report on a single event of nightside aurora (∼22 magnetic local time) preceding a substorm onset. To determine the spatiotemporal characteristics, we perform an innovative analysis of an all‐sky imager movie (19 min… 
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