Non-triggered auroral substorms and long-period (1–4 mHz) geomagnetic and auroral luminosity pulsations in the polar cap
A study is undertaken into parameters of the polar auroral and geomagnetic pulsations in the frequency range 1–4 mHz (Pc5∕Pi3) during quiet geomagnetic intervals preceding auroral substorms and non-substorm background variations. Special attention is paid to substorms that occur under parameters of...
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ftdoajarticles:oai:doaj.org/article:afb523b1540a43fd81d350b85f434dc3 2023-05-15T18:29:48+02:00 Non-triggered auroral substorms and long-period (1–4 mHz) geomagnetic and auroral luminosity pulsations in the polar cap N. Yagova N. Nosikova L. Baddeley O. Kozyreva D. A. Lorentzen V. Pilipenko M. G. Johnsen 2017-03-01T00:00:00Z https://doi.org/10.5194/angeo-35-365-2017 https://doaj.org/article/afb523b1540a43fd81d350b85f434dc3 EN eng Copernicus Publications https://www.ann-geophys.net/35/365/2017/angeo-35-365-2017.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-35-365-2017 0992-7689 1432-0576 https://doaj.org/article/afb523b1540a43fd81d350b85f434dc3 Annales Geophysicae, Vol 35, Pp 365-376 (2017) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2017 ftdoajarticles https://doi.org/10.5194/angeo-35-365-2017 2022-12-31T15:01:51Z A study is undertaken into parameters of the polar auroral and geomagnetic pulsations in the frequency range 1–4 mHz (Pc5∕Pi3) during quiet geomagnetic intervals preceding auroral substorms and non-substorm background variations. Special attention is paid to substorms that occur under parameters of the interplanetary magnetic field (IMF) conditions typical for undisturbed days (<q>non-triggered substorms</q>). The spectral parameters of pulsations observed in auroral luminosity as measured by a meridian scanning photometer (Svalbard) in the polar cap and near the polar boundary of the auroral oval are studied and compared with those for the geomagnetic pulsations measured by the magnetometer network IMAGE in the same frequency range. It is found that Pc5∕Pi3 power spectral density (PSD) is higher during pre-substorm time intervals than for non-substorm days and that specific variations of pulsation parameters (</q><q>substorm precursors</q>) occur during the last 2–4 pre-substorm hours. Article in Journal/Newspaper Svalbard Directory of Open Access Journals: DOAJ Articles Svalbard Annales Geophysicae 35 3 365 376 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 N. Yagova N. Nosikova L. Baddeley O. Kozyreva D. A. Lorentzen V. Pilipenko M. G. Johnsen Non-triggered auroral substorms and long-period (1–4 mHz) geomagnetic and auroral luminosity pulsations in the polar cap |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
A study is undertaken into parameters of the polar auroral and geomagnetic pulsations in the frequency range 1–4 mHz (Pc5∕Pi3) during quiet geomagnetic intervals preceding auroral substorms and non-substorm background variations. Special attention is paid to substorms that occur under parameters of the interplanetary magnetic field (IMF) conditions typical for undisturbed days (<q>non-triggered substorms</q>). The spectral parameters of pulsations observed in auroral luminosity as measured by a meridian scanning photometer (Svalbard) in the polar cap and near the polar boundary of the auroral oval are studied and compared with those for the geomagnetic pulsations measured by the magnetometer network IMAGE in the same frequency range. It is found that Pc5∕Pi3 power spectral density (PSD) is higher during pre-substorm time intervals than for non-substorm days and that specific variations of pulsation parameters (</q><q>substorm precursors</q>) occur during the last 2–4 pre-substorm hours. |
format |
Article in Journal/Newspaper |
author |
N. Yagova N. Nosikova L. Baddeley O. Kozyreva D. A. Lorentzen V. Pilipenko M. G. Johnsen |
author_facet |
N. Yagova N. Nosikova L. Baddeley O. Kozyreva D. A. Lorentzen V. Pilipenko M. G. Johnsen |
author_sort |
N. Yagova |
title |
Non-triggered auroral substorms and long-period (1–4 mHz) geomagnetic and auroral luminosity pulsations in the polar cap |
title_short |
Non-triggered auroral substorms and long-period (1–4 mHz) geomagnetic and auroral luminosity pulsations in the polar cap |
title_full |
Non-triggered auroral substorms and long-period (1–4 mHz) geomagnetic and auroral luminosity pulsations in the polar cap |
title_fullStr |
Non-triggered auroral substorms and long-period (1–4 mHz) geomagnetic and auroral luminosity pulsations in the polar cap |
title_full_unstemmed |
Non-triggered auroral substorms and long-period (1–4 mHz) geomagnetic and auroral luminosity pulsations in the polar cap |
title_sort |
non-triggered auroral substorms and long-period (1–4 mhz) geomagnetic and auroral luminosity pulsations in the polar cap |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/angeo-35-365-2017 https://doaj.org/article/afb523b1540a43fd81d350b85f434dc3 |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
Svalbard |
genre_facet |
Svalbard |
op_source |
Annales Geophysicae, Vol 35, Pp 365-376 (2017) |
op_relation |
https://www.ann-geophys.net/35/365/2017/angeo-35-365-2017.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-35-365-2017 0992-7689 1432-0576 https://doaj.org/article/afb523b1540a43fd81d350b85f434dc3 |
op_doi |
https://doi.org/10.5194/angeo-35-365-2017 |
container_title |
Annales Geophysicae |
container_volume |
35 |
container_issue |
3 |
container_start_page |
365 |
op_container_end_page |
376 |
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1766213179059208192 |