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AuthorsSantarelli, L.* 
Cafarella, L.* 
Lepidi, S.* 
Di Mauro, D.* 
Meloni, A.* 
Palangio, P.* 
TitleFourteen years of geomagnetic daily variation at Mario Zucchelli Station (Antarctica)
Issue Date2007
Series/Report no.2 / 50 (2007)
KeywordsGeomagnetic daily variation, polar areas
Subject Classification04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals 
AbstractDuring the 1986-87 austral summer a geomagnetic observatory was installed at the Italian Antarctic Base Mario Zucchelli Station. In the first three years continuous time variation monitoring and absolute measurements of the geomagnetic field were carried out only during summer expeditions. Starting 1991 an automatic acquisition system, operating through all the year, was put in operation. We present here some peculiarities of the daily variation as observed for fourteen years (1987-2000). The availability of a long series of data has allowed the definition of seasonal, as well as solar cycle effects, on short time variations as observed at a cusp-cap observatory. In particular, contrary to mid latitude behaviour, a clear dependence of the daily variation amplitude on the global geomagnetic K index was well defined.
Appears in Collections:Annals of Geophysics
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