Numerical simulation of VLF risers, fallers, and hooks observed in Antarctica

Smith, A. J.; Nunn, D.. 1998 Numerical simulation of VLF risers, fallers, and hooks observed in Antarctica. Journal of Geophysical Research, 103 (A4). 6771-6784. 10.1029/97JA03396

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Official URL: http://dx.doi.org/10.1029/97JA03396

Abstract/Summary

The VLF database from Halley station, Antarctica, has been searched, and prominent examples of discrete emissions are presented. Risers, fallers, quasiconstant tones, and upward and downward hooks are all common. Also observed are risers and fallers triggered from the tops of hiss bands. A one-dimensional Vlasov VHS code has been used to simulate the main types of events observed. Using realistic plasma parameters, the code successfully reproduces the main kinds of events observed, in good qualitative agreement with observations. Distinct generation region structures are found to be associated with risers and fallers. Hook formation is interpreted as being a spontaneous transition between these two quasi-stable generation region structures.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1029/97JA03396
Programmes:	BAS Programmes > Pre 2000 programme
ISSN:	0148-0227
Date made live:	18 Dec 2013 11:57 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/504342

Item Type:

Publication - Article

Digital Object Identifier (DOI):

10.1029/97JA03396

Programmes:

BAS Programmes > Pre 2000 programme

ISSN:

0148-0227

Date made live:

18 Dec 2013 11:57 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/504342