Earth-prints repository, logo   DSpace

About DSpace Software
|earth-prints home page | roma library | bologna library | catania library | milano library | napoli library | palermo library
Please use this identifier to cite or link to this item:

Authors: Lepidi, S.*
Cafarella, L.*
Pietrolungo, M.*
Santarelli, L.*
Title: Azimuthal propagation of Pc5 geomagnetic field pulsations in the southern polar cap
Title of journal: Advances in Space Research
Publisher: Elsevier
Issue Date: 2010
DOI: 10.1016/j.asr.2010.10.027
Keywords: (2784) Solar wind-magnetosphere interactions
(2776) Polar cap phenomena
(2752) MHD waves and instabilities
Abstract: A statistical analysis of low frequency geomagnetic fluctuations at the two Antarctic stations Mario Zucchelli Station (geographic coordinates: 74.7S, 164.1E; corrected geomagnetic coordinates: 80.0S, 306.8E) and Dumont D’Urville (geographic coordinates: 66.7S 140.0E; corrected geomagnetic coordinates: 80.4S 236.0E) is shown. The analysis focuses on power spectra, coherence and phase difference between the stations, which are both located in the polar cap, with a 5-hr magnetic local time displacement along a geomagnetic parallel; in this situation, the phase difference between geomagnetic fluctuations indicates the direction of their azimuthal propagation. Coherent fluctuations have been found to occur preferably when both stations are on the same side (dawnward or duskward) with respect to the polar cusp; moreover, around local magnetic midnight, they occur essentially during open magnetospheric conditions. The phase difference for coherent fluctuations indicates a propagation direction away from local geomagnetic noon and midnight. Also the analysis of three individual pulsation events, occurring at different times during the day, is shown; they are characterized at the two stations by simultaneous, coherent fluctuations, whose phase difference finds correspondence with the statistical behaviour.
Appears in Collections:04.05.02. Geomagnetic field variations and reversals
Papers Published / Papers in press

Files in This Item:

File SizeFormatVisibility
Article.pdf679.46 kBAdobe PDFonly authorized users View/Open

This item is licensed under a Creative Commons License
Creative Commons

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Share this record




Stumble it!



Valid XHTML 1.0! ICT Support, development & maintenance are provided by CINECA. Powered on DSpace Software. CINECA