Journal article
Longitudinally propagating arc wave in the pre‐onset optical aurora
Abstract
We present the first systematic observational evidence for a traveling periodic structure in the pre‐onset optical aurora – the longitudinally propagating arc wave (LPAW) – associated with flapping oscillations in the magnetotail. The LPAW is characterized by azimuthally moving intensity enhancements inside auroral arcs as seen by THEMIS ground‐based all‐sky imagers. It travels westward in the pre‐midnight auroral sector during the 10–20 …
Authors
Uritsky VM; Liang J; Donovan E; Spanswick E; Knudsen D; Liu W; Bonnell J; Glassmeier KH
Journal
Geophysical Research Letters, Vol. 36, No. 21,
Publisher
American Geophysical Union (AGU)
Publication Date
11 2009
DOI
10.1029/2009gl040777
ISSN
0094-8276