Pc3 pulsations in the polar cap and at low latitude
We present a statistical analysis of Pc3–4 pulsations during 2005 at two polar cap stations (Terra Nova Bay and Dome C, Antarctica) and, for comparison, at a low‐latitude station (L’Aquila). The analysis technique allows to discriminate the signal component from the background noise in the power spe...
Published in: | Journal of Geophysical Research: Space Physics |
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Online Access: | http://hdl.handle.net/2122/12118 https://doi.org/10.1029/2010JA015967 |
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ftingv:oai:www.earth-prints.org:2122/12118 2023-05-15T14:01:37+02:00 Pc3 pulsations in the polar cap and at low latitude De Lauretis, M. Francia, P. Regi, Mauro Villante, U. Piancatelli, A. #PLACEHOLDER_PARENT_METADATA_VALUE# 2010 http://hdl.handle.net/2122/12118 https://doi.org/10.1029/2010JA015967 en eng Journal of Geophysical Research-Space Physics /115 (2010) http://hdl.handle.net/2122/12118 doi:10.1029/2010JA015967 open article 2010 ftingv https://doi.org/10.1029/2010JA015967 2022-07-29T06:07:38Z We present a statistical analysis of Pc3–4 pulsations during 2005 at two polar cap stations (Terra Nova Bay and Dome C, Antarctica) and, for comparison, at a low‐latitude station (L’Aquila). The analysis technique allows to discriminate the signal component from the background noise in the power spectrum and to determine the frequency of such ULF signal, commonly associated to the upstream wave source. The comparison of data makes evident that the characteristics of the ULF pulsations are different at low and high latitudes, and significant differences emerge also between the two polar cap stations. At Dome C the ULF signals are observed during the whole day, while at Terra Nova Bay and at L’Aquila the signals are mainly observed in the dayside sector. The different cone angle dependence at L’Aquila and Dome C, the steeper slope in the frequency dependence on the interplanetary magnetic field strength at Dome C with respect to L’Aquila and Terra Nova Bay and the time dependence of the coherence between pulsations at the Antarctic stations suggest that at low‐latitude waves are transmitted to the ground from a region close to the subsolar bow shock, while near the geomagnetic pole waves are mainly transmitted through the magnetotail lobes. At Terra Nova Bay, where the local field lines approach the cusp around noon and are stretched into the magnetotail around midnight, the transmission path seems to be time dependent, with daytime and nighttime pulsations penetrating through the subsolar point and via the magnetotail lobes, respectively. Published A11223 1A. Geomagnetismo e Paleomagnetismo JCR Journal Article in Journal/Newspaper Antarc* Antarctic Antarctica Geomagnetic Pole Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) Antarctic Terra Nova Bay The Antarctic Journal of Geophysical Research: Space Physics 115 A11 n/a n/a |
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Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) |
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language |
English |
description |
We present a statistical analysis of Pc3–4 pulsations during 2005 at two polar cap stations (Terra Nova Bay and Dome C, Antarctica) and, for comparison, at a low‐latitude station (L’Aquila). The analysis technique allows to discriminate the signal component from the background noise in the power spectrum and to determine the frequency of such ULF signal, commonly associated to the upstream wave source. The comparison of data makes evident that the characteristics of the ULF pulsations are different at low and high latitudes, and significant differences emerge also between the two polar cap stations. At Dome C the ULF signals are observed during the whole day, while at Terra Nova Bay and at L’Aquila the signals are mainly observed in the dayside sector. The different cone angle dependence at L’Aquila and Dome C, the steeper slope in the frequency dependence on the interplanetary magnetic field strength at Dome C with respect to L’Aquila and Terra Nova Bay and the time dependence of the coherence between pulsations at the Antarctic stations suggest that at low‐latitude waves are transmitted to the ground from a region close to the subsolar bow shock, while near the geomagnetic pole waves are mainly transmitted through the magnetotail lobes. At Terra Nova Bay, where the local field lines approach the cusp around noon and are stretched into the magnetotail around midnight, the transmission path seems to be time dependent, with daytime and nighttime pulsations penetrating through the subsolar point and via the magnetotail lobes, respectively. Published A11223 1A. Geomagnetismo e Paleomagnetismo JCR Journal |
author2 |
#PLACEHOLDER_PARENT_METADATA_VALUE# |
format |
Article in Journal/Newspaper |
author |
De Lauretis, M. Francia, P. Regi, Mauro Villante, U. Piancatelli, A. |
spellingShingle |
De Lauretis, M. Francia, P. Regi, Mauro Villante, U. Piancatelli, A. Pc3 pulsations in the polar cap and at low latitude |
author_facet |
De Lauretis, M. Francia, P. Regi, Mauro Villante, U. Piancatelli, A. |
author_sort |
De Lauretis, M. |
title |
Pc3 pulsations in the polar cap and at low latitude |
title_short |
Pc3 pulsations in the polar cap and at low latitude |
title_full |
Pc3 pulsations in the polar cap and at low latitude |
title_fullStr |
Pc3 pulsations in the polar cap and at low latitude |
title_full_unstemmed |
Pc3 pulsations in the polar cap and at low latitude |
title_sort |
pc3 pulsations in the polar cap and at low latitude |
publishDate |
2010 |
url |
http://hdl.handle.net/2122/12118 https://doi.org/10.1029/2010JA015967 |
geographic |
Antarctic Terra Nova Bay The Antarctic |
geographic_facet |
Antarctic Terra Nova Bay The Antarctic |
genre |
Antarc* Antarctic Antarctica Geomagnetic Pole |
genre_facet |
Antarc* Antarctic Antarctica Geomagnetic Pole |
op_relation |
Journal of Geophysical Research-Space Physics /115 (2010) http://hdl.handle.net/2122/12118 doi:10.1029/2010JA015967 |
op_rights |
open |
op_doi |
https://doi.org/10.1029/2010JA015967 |
container_title |
Journal of Geophysical Research: Space Physics |
container_volume |
115 |
container_issue |
A11 |
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n/a |
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_version_ |
1766271572785496064 |