Latest research on geomagnetic field in Lithuania

Abstract

Lithuania, supported by Polish specialists, has successfully integrated in the European geomagnetic field research activities. Six repeat stations were established in 1999 and precise geomagnetic field measurements were performed in 1999, 2001, 2004 and 2007 there. Additional measurements in four airports of Lithuania were done in 2006, 2007 and 2010. Based on measured data, analysis of geomagnetic field parameter changes was performed. Accumulated data was processed and used for updating Lithuanian declination map and magnetic declination model accuracy estimating. Institute of geodesy acquired the modern equipment for geomagnetic field measurement in 2012. Equipment consists of two units of antimagnetic theodolite Theo010B with D/I FLUXGATE magnetometer, dIdD magnetometer and ENVI PRO magnetometer/gradiometer. Experimental measurements of geomagnetic field were performed at VGTU zero order gravity point. Diurnal magnetic field variations at measuring station and neighbouring observatories were analysed. Best correlation between data changes in observatory and measuring station was analysed. Data of research are useful for data reductions and best observatory selection.