We report DEMETER observations of strongly intensified electric noise at the lower hybrid frequency in the midlatitude ionosphere during the recovery phase of a magnetic storm. The spectrum of the noise is broadband and centered at the lower hybrid frequency, which is of a very unusual shape that suggests nonlinear interaction triggered by the injection of ring current ions into the ionosphere.
Published in:
Plasma Science, IEEE Transactions on
(Volume:36
,
Issue:
4
)
Date of Publication: Aug. 2008