GEOMAGNETIC FIELD OBSERVATIONS AT TERRA NOVA BAY (ANTARCTICA)

Real Instituto y Observatorio de la Armada
San Fernando, Cádiz, Spain

During the 1986-87 austral summer a geomagnetic observatory was installed at the Italian Antarctic Base Mario
Zucchelli Station (TNB, geographic coordinates: 74.7S, 164.1E; corrected geomagnetic coord.: 80.0S, 307.7E; magnetic
local time MLT=UT-8). In the first years, measurements of the geomagnetic field variations were carried out only during
summer expeditions. Since 1991 the recording was implemented with an automatic acquisition system operating through
the year. In this work we present the most relevant results obtained from TNB observations coming from more than twenty
years of observations, also including a comparison with measurements taken at other Antarctic stations.