Auroral pulsations and accompanying VLF emissions
Results of simultaneous TV observations of pulsating auroral patches and ELF-VLF-emissions in the morning sector carried out in Sodankylä (Finland) on February 15, 1991 are presented. Auroral pulsating activity was typical having pulsating patches with characteristic periods of about 7 s. Narrow-ban...
Published in: | Annales Geophysicae |
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Springer Verlag
1999
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00037126 2023-05-15T18:20:18+02:00 Auroral pulsations and accompanying VLF emissions Tagirov, V. R. Ismagilov, V. S. Titova, E. E. Arinin, V. A. Perlikov, A. M. Manninen, J. Turunen, T. Kaila, K. 1999-01 electronic https://doi.org/10.1007/s00585-999-0066-9 https://noa.gwlb.de/receive/cop_mods_00037126 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00037080/angeo-17-66-1999.pdf https://angeo.copernicus.org/articles/17/66/1999/angeo-17-66-1999.pdf eng eng Springer Verlag Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.1007/s00585-999-0066-9 https://noa.gwlb.de/receive/cop_mods_00037126 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00037080/angeo-17-66-1999.pdf https://angeo.copernicus.org/articles/17/66/1999/angeo-17-66-1999.pdf https://open-access.net/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 1999 ftnonlinearchiv https://doi.org/10.1007/s00585-999-0066-9 2022-02-08T22:43:40Z Results of simultaneous TV observations of pulsating auroral patches and ELF-VLF-emissions in the morning sector carried out in Sodankylä (Finland) on February 15, 1991 are presented. Auroral pulsating activity was typical having pulsating patches with characteristic periods of about 7 s. Narrow-band hiss emissions and chorus elements at intervals of 0.3–0.4 s formed the main ELF-VLF activity in the frequency range 1.0–2.5 kHz at the same time. The analysis of auroral images with time resolution of 0.04 s allowed perfectly separate analysis of spatial and temporal variations in the auroral luminosity. Mutual correspondence between the behaviour of the luminous auroral patches and the appearance of ELF noise type hiss emissions and VLF chorus trains was found in two intervals chosen for analysis. While the hiss emissions were associated with the appearance of luminosity inside a limited area close to the zenith, the structured VLF emissions were accompanied by rapid motion of luminosity inside the area. The spatial dimension of the pulsating area was about 45–50 km and luminosity propagated inside it with velocity of about 10–12 kms. We discuss a new approach to explain the 5–15 s auroral pulsation based on the theory of flowing cyclotron maser and relaxation characteristics of ionosphere. Key words. Magnetospheric physics (auroral phenomena; magnetosphere-ionosphere interactions) · Space plasma physics (wave-particle interactions) Article in Journal/Newspaper Sodankylä Niedersächsisches Online-Archiv NOA Sodankylä ENVELOPE(26.600,26.600,67.417,67.417) Annales Geophysicae 17 1 66 78 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
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English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Tagirov, V. R. Ismagilov, V. S. Titova, E. E. Arinin, V. A. Perlikov, A. M. Manninen, J. Turunen, T. Kaila, K. Auroral pulsations and accompanying VLF emissions |
topic_facet |
article Verlagsveröffentlichung |
description |
Results of simultaneous TV observations of pulsating auroral patches and ELF-VLF-emissions in the morning sector carried out in Sodankylä (Finland) on February 15, 1991 are presented. Auroral pulsating activity was typical having pulsating patches with characteristic periods of about 7 s. Narrow-band hiss emissions and chorus elements at intervals of 0.3–0.4 s formed the main ELF-VLF activity in the frequency range 1.0–2.5 kHz at the same time. The analysis of auroral images with time resolution of 0.04 s allowed perfectly separate analysis of spatial and temporal variations in the auroral luminosity. Mutual correspondence between the behaviour of the luminous auroral patches and the appearance of ELF noise type hiss emissions and VLF chorus trains was found in two intervals chosen for analysis. While the hiss emissions were associated with the appearance of luminosity inside a limited area close to the zenith, the structured VLF emissions were accompanied by rapid motion of luminosity inside the area. The spatial dimension of the pulsating area was about 45–50 km and luminosity propagated inside it with velocity of about 10–12 kms. We discuss a new approach to explain the 5–15 s auroral pulsation based on the theory of flowing cyclotron maser and relaxation characteristics of ionosphere. Key words. Magnetospheric physics (auroral phenomena; magnetosphere-ionosphere interactions) · Space plasma physics (wave-particle interactions) |
format |
Article in Journal/Newspaper |
author |
Tagirov, V. R. Ismagilov, V. S. Titova, E. E. Arinin, V. A. Perlikov, A. M. Manninen, J. Turunen, T. Kaila, K. |
author_facet |
Tagirov, V. R. Ismagilov, V. S. Titova, E. E. Arinin, V. A. Perlikov, A. M. Manninen, J. Turunen, T. Kaila, K. |
author_sort |
Tagirov, V. R. |
title |
Auroral pulsations and accompanying VLF emissions |
title_short |
Auroral pulsations and accompanying VLF emissions |
title_full |
Auroral pulsations and accompanying VLF emissions |
title_fullStr |
Auroral pulsations and accompanying VLF emissions |
title_full_unstemmed |
Auroral pulsations and accompanying VLF emissions |
title_sort |
auroral pulsations and accompanying vlf emissions |
publisher |
Springer Verlag |
publishDate |
1999 |
url |
https://doi.org/10.1007/s00585-999-0066-9 https://noa.gwlb.de/receive/cop_mods_00037126 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00037080/angeo-17-66-1999.pdf https://angeo.copernicus.org/articles/17/66/1999/angeo-17-66-1999.pdf |
long_lat |
ENVELOPE(26.600,26.600,67.417,67.417) |
geographic |
Sodankylä |
geographic_facet |
Sodankylä |
genre |
Sodankylä |
genre_facet |
Sodankylä |
op_relation |
Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.1007/s00585-999-0066-9 https://noa.gwlb.de/receive/cop_mods_00037126 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00037080/angeo-17-66-1999.pdf https://angeo.copernicus.org/articles/17/66/1999/angeo-17-66-1999.pdf |
op_rights |
https://open-access.net/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1007/s00585-999-0066-9 |
container_title |
Annales Geophysicae |
container_volume |
17 |
container_issue |
1 |
container_start_page |
66 |
op_container_end_page |
78 |
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1766197807935389696 |