Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/1188
Authors: | Lepidi, S.* Francia, P.* De Lauretis, M.* |
Title: | Local time behaviour of low frequency geomagnetic field fluctuation power at low latitude | Issue Date: | Feb-2001 | Series/Report no.: | 1/44 (2001) | URI: | http://hdl.handle.net/2122/1188 | Keywords: | Geomagnetic pulsation MHD waves and instabilities |
Subject Classification: | 04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals | Abstract: | In this paper we present a statistical study of the local time behaviour of low frequency (0.7-4.0 mHz) geomagnetic field fluctuation power at a low latitude station (corrected geomagnetic latitude 36.2°N). The analysis was conducted for two contiguous years during the ascending phase of the solar cycle. We found that the power of the horizontal east-west geomagnetic field component shows a diurnal and seasonal variation which can be related to variations of the ionospheric current system (Sq) mainly produced by dynamo-action in the ionospheric E region. The power of the horizontal north-south geomagnetic field component is higher in the local afternoon with respect to the morning; this asymmetry is more evident during time intervals characterized by high solar wind dynamic pressure. |
Appears in Collections: | Annals of Geophysics |
Show full item record
Page view(s)
150
checked on Apr 24, 2024
Download(s) 50
298
checked on Apr 24, 2024