The longitudinal polar cusp displacement from geomagnetic measurements in Antarctica
We used ULF geomagnetic field measurements in the Pc5 frequency range (1.7-7 mHz) attwo Antarctic stations to statistically investigate the longitudinal location of the polar cusp.The two stations are located at the same geomagnetic latitude, ~80° S (just poleward of thecusp), and are separated by o...
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Istituto Nazionale di Geofisica e Vulcanologia, INGV
2019
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Online Access: | https://www.annalsofgeophysics.eu/index.php/annals/article/view/7779 https://doi.org/10.4401/ag-7779 |
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ftjaog:oai:ojs.annalsofgeophysics.eu:article/7779 2023-05-15T13:54:52+02:00 The longitudinal polar cusp displacement from geomagnetic measurements in Antarctica Marzocchetti, Martina Lepidi, Stefania Francia, Patrizia Cafarella, Lili Di Mauro, Domenico 2019-12-12 application/pdf https://www.annalsofgeophysics.eu/index.php/annals/article/view/7779 https://doi.org/10.4401/ag-7779 eng eng Istituto Nazionale di Geofisica e Vulcanologia, INGV https://www.annalsofgeophysics.eu/index.php/annals/article/view/7779/7146 https://www.annalsofgeophysics.eu/index.php/annals/article/view/7779 doi:10.4401/ag-7779 Copyright (c) 2019 Annals of Geophysics Annals of Geophysics; V. 62 N. 4 (2019); GM446 Annals of Geophysics; Vol. 62 No. 4 (2019); GM446 2037-416X 1593-5213 Magnetospheric physics Structure and dynamics Geomagnetic field variations and reversals Solar-terrestrial interaction Space weather info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2019 ftjaog https://doi.org/10.4401/ag-7779 2022-03-27T06:38:42Z We used ULF geomagnetic field measurements in the Pc5 frequency range (1.7-7 mHz) attwo Antarctic stations to statistically investigate the longitudinal location of the polar cusp.The two stations are located at the same geomagnetic latitude, ~80° S (just poleward of thecusp), and are separated by one hour in magnetic local time. Since at each station the Pc5power maximizes when the station approaches the cusp, the comparison between their Pc5power allows to estimate the longitudinal position of the cusp and to examine its movements.We found that there is a displacement of the cusp depending on interplanetary conditions;in particular, the cusp shifts to later hours for negative values of the interplanetary magneticfield and solar wind velocity east-west components (By and Vy), while moves to earlier hoursfor positive values of Vy. Conversely, no dependence of the cusp longitudinal position onpositive By values nor on the interplanetary magnetic field north-south component (Bz) emerges. Article in Journal/Newspaper Antarc* Antarctic Antarctica Annals of Geophysics (INGV, Istituto Nazionale di Geofisica e Vulcanologia) Antarctic Annals of Geophysics 61 Vol 61 (2018) |
institution |
Open Polar |
collection |
Annals of Geophysics (INGV, Istituto Nazionale di Geofisica e Vulcanologia) |
op_collection_id |
ftjaog |
language |
English |
topic |
Magnetospheric physics Structure and dynamics Geomagnetic field variations and reversals Solar-terrestrial interaction Space weather |
spellingShingle |
Magnetospheric physics Structure and dynamics Geomagnetic field variations and reversals Solar-terrestrial interaction Space weather Marzocchetti, Martina Lepidi, Stefania Francia, Patrizia Cafarella, Lili Di Mauro, Domenico The longitudinal polar cusp displacement from geomagnetic measurements in Antarctica |
topic_facet |
Magnetospheric physics Structure and dynamics Geomagnetic field variations and reversals Solar-terrestrial interaction Space weather |
description |
We used ULF geomagnetic field measurements in the Pc5 frequency range (1.7-7 mHz) attwo Antarctic stations to statistically investigate the longitudinal location of the polar cusp.The two stations are located at the same geomagnetic latitude, ~80° S (just poleward of thecusp), and are separated by one hour in magnetic local time. Since at each station the Pc5power maximizes when the station approaches the cusp, the comparison between their Pc5power allows to estimate the longitudinal position of the cusp and to examine its movements.We found that there is a displacement of the cusp depending on interplanetary conditions;in particular, the cusp shifts to later hours for negative values of the interplanetary magneticfield and solar wind velocity east-west components (By and Vy), while moves to earlier hoursfor positive values of Vy. Conversely, no dependence of the cusp longitudinal position onpositive By values nor on the interplanetary magnetic field north-south component (Bz) emerges. |
format |
Article in Journal/Newspaper |
author |
Marzocchetti, Martina Lepidi, Stefania Francia, Patrizia Cafarella, Lili Di Mauro, Domenico |
author_facet |
Marzocchetti, Martina Lepidi, Stefania Francia, Patrizia Cafarella, Lili Di Mauro, Domenico |
author_sort |
Marzocchetti, Martina |
title |
The longitudinal polar cusp displacement from geomagnetic measurements in Antarctica |
title_short |
The longitudinal polar cusp displacement from geomagnetic measurements in Antarctica |
title_full |
The longitudinal polar cusp displacement from geomagnetic measurements in Antarctica |
title_fullStr |
The longitudinal polar cusp displacement from geomagnetic measurements in Antarctica |
title_full_unstemmed |
The longitudinal polar cusp displacement from geomagnetic measurements in Antarctica |
title_sort |
longitudinal polar cusp displacement from geomagnetic measurements in antarctica |
publisher |
Istituto Nazionale di Geofisica e Vulcanologia, INGV |
publishDate |
2019 |
url |
https://www.annalsofgeophysics.eu/index.php/annals/article/view/7779 https://doi.org/10.4401/ag-7779 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Annals of Geophysics; V. 62 N. 4 (2019); GM446 Annals of Geophysics; Vol. 62 No. 4 (2019); GM446 2037-416X 1593-5213 |
op_relation |
https://www.annalsofgeophysics.eu/index.php/annals/article/view/7779/7146 https://www.annalsofgeophysics.eu/index.php/annals/article/view/7779 doi:10.4401/ag-7779 |
op_rights |
Copyright (c) 2019 Annals of Geophysics |
op_doi |
https://doi.org/10.4401/ag-7779 |
container_title |
Annals of Geophysics |
container_volume |
61 |
container_issue |
Vol 61 (2018) |
_version_ |
1766261019904049152 |