GEOMAGNETIC FIELD MEASUREMENTS AT MAGNETIC REPEAT STATIONS IN FORMER YUGOSLAVIA

摘要

A brief historical review of the geomagnetic field measurements in the territory of former Yugoslavia follows. In 1957 continuous magnetic recordings began at Grocka Geomagnetic Observatory (GCK). Field measurements at repeat stations were made at the same time. Grocka Observatory is still the only institution of its kind in the territory of former Yugoslavia. The frequency of the repeat station measurements and the instruments used will be discussed. A new network of magnetic repeat stations was designed for the territory of the Federal Republic of Yugoslavia (FR Yugoslavia). Between 1994 and 1998, geomagnetic surveys and first order surveys have been done at repeat stations (secular stations). This paper reports on the variometer methodology used in magnetic repeat station surveys. The diurnal variations of the geomagnetic field are analyzed at the secular stations in the northern part of Yugoslavia. Also, the spectrum of the diurnal variations, recorded at secular stations, is shown.