Small-scale structures in flickering aurora
Article first published online: 9 DEC 2008
Copyright 2008 by the American Geophysical Union.
Geophysical Research Letters
Volume 35, Issue 23, December 2008
How to Cite
2008), Small-scale structures in flickering aurora, Geophys. Res. Lett., 35, L23103, doi:10.1029/2008GL036134., , , , , and (
- Issue published online: 9 DEC 2008
- Article first published online: 9 DEC 2008
- Manuscript Accepted: 5 NOV 2008
- Manuscript Revised: 30 OCT 2008
- Manuscript Received: 25 SEP 2008
- flickering aurora;
- small-scale aurora
 A state-of-the-art multispectral imager has been used to study the flickering component of an auroral event at high spatial (40 m) and temporal (32 fps) resolution. Scale sizes for the flickering patches were found to be regularly smaller than 1 km. The typical flickering frequency observed was in the range 6–8 Hz, although flickering patches at both lower and higher frequencies were identified. The flickering structure was correlated with the coincident non-flickering aurora, showing that although there is a temporal relationship between the two, there is no spatial correlation. These results support the theory that flickering structure is caused by interfering dispersive Alfvén waves.