Quasi-periodic VLF emissions and concurrent magnetic pulsations seen at L = 4
The first observations are presented from Halley, Antarctica, of quasi-periodic (QP)_VLF intensity variations modulated at the frequency of concurrent Pc3 magnetic pulsations. Seen on broadband frequency-time plots, the QP emissions are of both the dispersive and non-dispersive types. From the frequ...
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ftnerc:oai:nora.nerc.ac.uk:520515 2024-02-04T09:55:39+01:00 Quasi-periodic VLF emissions and concurrent magnetic pulsations seen at L = 4 Morrison, K. 1990 http://nora.nerc.ac.uk/id/eprint/520515/ https://doi.org/10.1016/0032-0633(90)90161-I unknown Elsevier Morrison, K. 1990 Quasi-periodic VLF emissions and concurrent magnetic pulsations seen at L = 4. Planetary and Space Science, 38 (12). 1555-1565. https://doi.org/10.1016/0032-0633(90)90161-I <https://doi.org/10.1016/0032-0633(90)90161-I> Publication - Article PeerReviewed 1990 ftnerc https://doi.org/10.1016/0032-0633(90)90161-I 2024-01-05T00:03:05Z The first observations are presented from Halley, Antarctica, of quasi-periodic (QP)_VLF intensity variations modulated at the frequency of concurrent Pc3 magnetic pulsations. Seen on broadband frequency-time plots, the QP emissions are of both the dispersive and non-dispersive types. From the frequency and phase variation with time of the QP emissions and magnetic pulsations, estimates are obtained of the travel times of the ULF waves from the interaction region to the ground. The observations appear consistent with the idea of modulation of a pre-existing VLF hiss source in the magnetosphere by the compressional components of ULF waves. A significant change in the travel time during one event is consistent with a crossing of the plasmapause by the Halley fieldline. Article in Journal/Newspaper Antarc* Antarctica Natural Environment Research Council: NERC Open Research Archive Planetary and Space Science 38 12 1555 1565 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
description |
The first observations are presented from Halley, Antarctica, of quasi-periodic (QP)_VLF intensity variations modulated at the frequency of concurrent Pc3 magnetic pulsations. Seen on broadband frequency-time plots, the QP emissions are of both the dispersive and non-dispersive types. From the frequency and phase variation with time of the QP emissions and magnetic pulsations, estimates are obtained of the travel times of the ULF waves from the interaction region to the ground. The observations appear consistent with the idea of modulation of a pre-existing VLF hiss source in the magnetosphere by the compressional components of ULF waves. A significant change in the travel time during one event is consistent with a crossing of the plasmapause by the Halley fieldline. |
format |
Article in Journal/Newspaper |
author |
Morrison, K. |
spellingShingle |
Morrison, K. Quasi-periodic VLF emissions and concurrent magnetic pulsations seen at L = 4 |
author_facet |
Morrison, K. |
author_sort |
Morrison, K. |
title |
Quasi-periodic VLF emissions and concurrent magnetic pulsations seen at L = 4 |
title_short |
Quasi-periodic VLF emissions and concurrent magnetic pulsations seen at L = 4 |
title_full |
Quasi-periodic VLF emissions and concurrent magnetic pulsations seen at L = 4 |
title_fullStr |
Quasi-periodic VLF emissions and concurrent magnetic pulsations seen at L = 4 |
title_full_unstemmed |
Quasi-periodic VLF emissions and concurrent magnetic pulsations seen at L = 4 |
title_sort |
quasi-periodic vlf emissions and concurrent magnetic pulsations seen at l = 4 |
publisher |
Elsevier |
publishDate |
1990 |
url |
http://nora.nerc.ac.uk/id/eprint/520515/ https://doi.org/10.1016/0032-0633(90)90161-I |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
Morrison, K. 1990 Quasi-periodic VLF emissions and concurrent magnetic pulsations seen at L = 4. Planetary and Space Science, 38 (12). 1555-1565. https://doi.org/10.1016/0032-0633(90)90161-I <https://doi.org/10.1016/0032-0633(90)90161-I> |
op_doi |
https://doi.org/10.1016/0032-0633(90)90161-I |
container_title |
Planetary and Space Science |
container_volume |
38 |
container_issue |
12 |
container_start_page |
1555 |
op_container_end_page |
1565 |
_version_ |
1789959713307230208 |