Polarization pattern of low-frequency geomagnetic field fluctuations (0.8-3.6 mHz) at high and low latitude

• Main Authors: Lepidi, S., Francia, P., Villante, U., Lanzerotti, L. J., Meloni, A.
• Other Authors: Lepidi, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia, Francia, P.; Dipartimento di Fisica, Università dell'Aquila, L'Aquila, Italy, Villante, U.; Dipartimento di Fisica, Università dell'Aquila, L'Aquila, Italy, Lanzerotti, L. J.; Bell Laboratories, Lucent Technologies, Murray Hill, New Jersy, Meloni, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia, Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia, Dipartimento di Fisica, Università dell'Aquila, L'Aquila, Italy, Bell Laboratories, Lucent Technologies, Murray Hill, New Jersy
• Format: Article in Journal/Newspaper
• Language: English
• Published: AGU 1999
• Subjects: Polarization pattern; low-frequency geomagnetic field fluctuations; Antarctica; L'Aquila; Italy; 01. Atmosphere::01.03. Magnetosphere::01.03.99. General or miscellaneous; 01. Atmosphere::01.03. Magnetosphere::01.03.04. Structure and dynamics; Antarctic; Terra Nova Bay; Antarc*
• Online Access: http://hdl.handle.net/2122/3933

A statistical analysis of the polarization pattern of low-frequency geomagnetic field fluctuations (0.8-3.6 mHz) covering the entire 24-hour interval has been performed at an Antarctic station (Terra Nova Bay) and a low-latitude station (L'Aquila, Italy) during the entire 1995. The results show a complex pattern in which, in agreement with predictions, four polarization reversals occur at high latitude during the local day. A comparison with another Antarctic station, McMurdo, during a shorter interval in 1994 confirms these results. At low latitude the polarization sense in the afternoon reverses with respect to the morning, but the reversal is delayed by a few hours after the expected local noon. In Antarctica the polarization pattern does not show any dependence on frequency and season, while at L'Aquila it is better defined for frequencies below ≈2 mHz and during local summer. Published 305-310 JCR Journal reserved