Ann. Geophysicae 18, 1412±1421 �2000) Ó EGS ± Springer-Verlag 2000 An analysis of Pc3 and Pc4 pulsations
Abstract. We conducted a statistical analysis of the physical characteristics of the micropulsation activity �Pc3 and Pc4 range) detected, during the austral summer 1994±95, at Terra Nova Bay �Antarctica, corrected latitude 80.0°S), a station which is few degrees poleward of those where most of the...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.371.9380 2023-05-15T14:01:15+02:00 Ann. Geophysicae 18, 1412±1421 �2000) Ó EGS ± Springer-Verlag 2000 An analysis of Pc3 and Pc4 pulsations At Terra Nova Bay �antarctica U. Villante M. Vellante G. De Sanctis The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.371.9380 http://hal.archives-ouvertes.fr/docs/00/31/68/13/PDF/angeo-18-1412-2000.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.371.9380 http://hal.archives-ouvertes.fr/docs/00/31/68/13/PDF/angeo-18-1412-2000.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://hal.archives-ouvertes.fr/docs/00/31/68/13/PDF/angeo-18-1412-2000.pdf Key words Magnetospheric physics �magnetopause text ftciteseerx 2016-01-08T01:21:09Z Abstract. We conducted a statistical analysis of the physical characteristics of the micropulsation activity �Pc3 and Pc4 range) detected, during the austral summer 1994±95, at Terra Nova Bay �Antarctica, corrected latitude 80.0°S), a station which is few degrees poleward of those where most of the Antarctic measurements in these frequency ranges have been performed. The emerging overview suggests that the correspondence between the pulsation power and the external parameters �solar wind speed, interplanetary magnetic ®eld magnitude and orientation) is signi®cantly stronger than at somewhat lower latitudes. The day-to-day power variability was found to be strictly related to the general level of the geomagnetic activity, and the power level sharply maximizes at local magnetic noon. In the Pc4 range peaks of correlation with the SW speed are found in the dawn and dusk sides of the Earth's magnetosphere and the daily variation of the polarization pattern is closely consistent with that found at auroral latitudes and at lower frequencies. In the Pc3 range the correlation coe cient between the pulsation power and the SW speed has maximum values in the local morning, and the frequency of selected events reveals a strong IMF control during closed magnetospheric conditions. The local time dependence of the correlation coe cient between the pulsation power and the cone angle reveals an additional control by the IMF orientation, which becomes more explicit around local noon. Text Antarc* Antarctic Antarctica Unknown Antarctic Austral Terra Nova Bay The Antarctic |
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English |
topic |
Key words Magnetospheric physics �magnetopause |
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Key words Magnetospheric physics �magnetopause At Terra Nova Bay �antarctica U. Villante M. Vellante G. De Sanctis Ann. Geophysicae 18, 1412±1421 �2000) Ó EGS ± Springer-Verlag 2000 An analysis of Pc3 and Pc4 pulsations |
topic_facet |
Key words Magnetospheric physics �magnetopause |
description |
Abstract. We conducted a statistical analysis of the physical characteristics of the micropulsation activity �Pc3 and Pc4 range) detected, during the austral summer 1994±95, at Terra Nova Bay �Antarctica, corrected latitude 80.0°S), a station which is few degrees poleward of those where most of the Antarctic measurements in these frequency ranges have been performed. The emerging overview suggests that the correspondence between the pulsation power and the external parameters �solar wind speed, interplanetary magnetic ®eld magnitude and orientation) is signi®cantly stronger than at somewhat lower latitudes. The day-to-day power variability was found to be strictly related to the general level of the geomagnetic activity, and the power level sharply maximizes at local magnetic noon. In the Pc4 range peaks of correlation with the SW speed are found in the dawn and dusk sides of the Earth's magnetosphere and the daily variation of the polarization pattern is closely consistent with that found at auroral latitudes and at lower frequencies. In the Pc3 range the correlation coe cient between the pulsation power and the SW speed has maximum values in the local morning, and the frequency of selected events reveals a strong IMF control during closed magnetospheric conditions. The local time dependence of the correlation coe cient between the pulsation power and the cone angle reveals an additional control by the IMF orientation, which becomes more explicit around local noon. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
At Terra Nova Bay �antarctica U. Villante M. Vellante G. De Sanctis |
author_facet |
At Terra Nova Bay �antarctica U. Villante M. Vellante G. De Sanctis |
author_sort |
At Terra Nova Bay �antarctica |
title |
Ann. Geophysicae 18, 1412±1421 �2000) Ó EGS ± Springer-Verlag 2000 An analysis of Pc3 and Pc4 pulsations |
title_short |
Ann. Geophysicae 18, 1412±1421 �2000) Ó EGS ± Springer-Verlag 2000 An analysis of Pc3 and Pc4 pulsations |
title_full |
Ann. Geophysicae 18, 1412±1421 �2000) Ó EGS ± Springer-Verlag 2000 An analysis of Pc3 and Pc4 pulsations |
title_fullStr |
Ann. Geophysicae 18, 1412±1421 �2000) Ó EGS ± Springer-Verlag 2000 An analysis of Pc3 and Pc4 pulsations |
title_full_unstemmed |
Ann. Geophysicae 18, 1412±1421 �2000) Ó EGS ± Springer-Verlag 2000 An analysis of Pc3 and Pc4 pulsations |
title_sort |
ann. geophysicae 18, 1412±1421 �2000) ó egs ± springer-verlag 2000 an analysis of pc3 and pc4 pulsations |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.371.9380 http://hal.archives-ouvertes.fr/docs/00/31/68/13/PDF/angeo-18-1412-2000.pdf |
geographic |
Antarctic Austral Terra Nova Bay The Antarctic |
geographic_facet |
Antarctic Austral Terra Nova Bay The Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
http://hal.archives-ouvertes.fr/docs/00/31/68/13/PDF/angeo-18-1412-2000.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.371.9380 http://hal.archives-ouvertes.fr/docs/00/31/68/13/PDF/angeo-18-1412-2000.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766270844937437184 |