Auroral hiss - last update: 2 December 1998, 1000 UT (RR)

Auroral hiss consists of broad band, often continuous and featureless emissions at 1-500 kHz. It is related to auroral arcs, i.e., dusk and evening side discrete auroras. Because of this, field-aligned potential drops must play some role hiss production, just like in AKR.

Auroral hiss is characterised by a sharp low-frequency cutoff near the local lower hybrid resonance frequency, and a high-frequency cutoff at the local plasma frequency or local electron cyclotron frequency fce.

For more information see, e.g., Bering et al. (1987) and Bahnsen et al. (1987).


See also