Modeling the geomagnetic field over Croatia.

During the last years investigation of the geomagnetic field in Croatia has started and an effort to establish the geomagnetic observatory has been made. Based on the total field measured over the northern eastern part of Croatia, the suitable position for installing the geomagnetic observatory is proposed. In this paper the core field behavior from 1961 to 2002 over the entire Croatian territory was investigated by exploiting different global models. Using a regional European model the secular variation over the country was calculated. The evolution of the core field at the potential location for installing the geomagnetic observatory was analyzed in detail. The calculated field variations follow the general core field variations over Europe and there are not variations due to different induced fields or other effects at the future observatory location. This study contributes to the investigation of the potential observatory location and paves the way for better understanding of the geomagnetic field behavior over Croatia. [ABSTRACT FROM AUTHOR]