Discovery of a low-latitude ionospheric trough associated with the inner radiation belt

Abstract The dynamics of ionospheric troughs that developed during a great geomagnetic storm on 11–13 April 2001 are studied using measurements of electron density obtained by the CHAMP satellite at an altitude of 410–465 km. Subauroral, mid-latitude and low-latitude troughs were observed at nightti...

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Autor principal:	A. T. Karpachev
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b35d749ca7b547d6aeda6abce29c809a
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spelling	oai:doaj.org-article:b35d749ca7b547d6aeda6abce29c809a2021-12-02T14:17:19ZDiscovery of a low-latitude ionospheric trough associated with the inner radiation belt10.1038/s41598-021-87356-y2045-2322https://doaj.org/article/b35d749ca7b547d6aeda6abce29c809a2021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-87356-yhttps://doaj.org/toc/2045-2322Abstract The dynamics of ionospheric troughs that developed during a great geomagnetic storm on 11–13 April 2001 are studied using measurements of electron density obtained by the CHAMP satellite at an altitude of 410–465 km. Subauroral, mid-latitude and low-latitude troughs were observed at nighttime, sometimes simultaneously. The subauroral trough is usually defined as the main ionospheric trough, whereas the mid-latitude trough is associated with the magnetospheric ring current. It appeared at the beginning of the storm recovery phase around latitudes of 40°–45° GMLat (L = 1.7–2.0) and existed for a long period of time throughout the late recovery phase of the residual ring current at latitudes of 50°–55° GMLat (L ~ 2.4–3.0). For the first time, a low-latitude trough was revealed. It developed at latitudes of 34°–45° GMLat (L = 1.45–2.00) in association with the precipitation of energetic particles from the inner radiation belt.A. T. KarpachevNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q A. T. Karpachev Discovery of a low-latitude ionospheric trough associated with the inner radiation belt
description	Abstract The dynamics of ionospheric troughs that developed during a great geomagnetic storm on 11–13 April 2001 are studied using measurements of electron density obtained by the CHAMP satellite at an altitude of 410–465 km. Subauroral, mid-latitude and low-latitude troughs were observed at nighttime, sometimes simultaneously. The subauroral trough is usually defined as the main ionospheric trough, whereas the mid-latitude trough is associated with the magnetospheric ring current. It appeared at the beginning of the storm recovery phase around latitudes of 40°–45° GMLat (L = 1.7–2.0) and existed for a long period of time throughout the late recovery phase of the residual ring current at latitudes of 50°–55° GMLat (L ~ 2.4–3.0). For the first time, a low-latitude trough was revealed. It developed at latitudes of 34°–45° GMLat (L = 1.45–2.00) in association with the precipitation of energetic particles from the inner radiation belt.
format	article
author	A. T. Karpachev
author_facet	A. T. Karpachev
author_sort	A. T. Karpachev
title	Discovery of a low-latitude ionospheric trough associated with the inner radiation belt
title_short	Discovery of a low-latitude ionospheric trough associated with the inner radiation belt
title_full	Discovery of a low-latitude ionospheric trough associated with the inner radiation belt
title_fullStr	Discovery of a low-latitude ionospheric trough associated with the inner radiation belt
title_full_unstemmed	Discovery of a low-latitude ionospheric trough associated with the inner radiation belt
title_sort	discovery of a low-latitude ionospheric trough associated with the inner radiation belt
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/b35d749ca7b547d6aeda6abce29c809a
work_keys_str_mv	AT atkarpachev discoveryofalowlatitudeionospherictroughassociatedwiththeinnerradiationbelt
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Discovery of a low-latitude ionospheric trough associated with the inner radiation belt

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