• Corpus ID: 248496534

Auroral Morphological Changes to the Formation of Auroral Spiral during the Late Substorm Recovery Phase: Polar UVI and Ground All-Sky Camera Observations

  title={Auroral Morphological Changes to the Formation of Auroral Spiral during the Late Substorm Recovery Phase: Polar UVI and Ground All-Sky Camera Observations},
  author={Motoharu Nowada and Yukinaga Miyashita and Noora Partamies and Alexander William Degeling and Quanqi Shi},
Polar ultraviolet imager (UVI) and an all-sky camera at Longyearbyen contemporaneously detected an auroral vortex structure (so-called “auroral spiral”). Particularly, from space, the auroral spiral was observed as a “small spot” in the poleward region of the main auroral oval near midnight, which was formed while the substorm-associated auroral bulge was subsiding and several poleward-elongated auroral streak-like structures appeared during the late substorm recovery phase. To pursue the… 

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