First Croatian Geomagnetic Observatory in Lonjsko Polje

Abstract

Earth’s magnetic field, geomagnetic field, is a very complex system that varies on a range of scales, both in the space and time domains. The variability of Earth’s magnetic field is the result of various processes, ranging from Earth’s deep interior, its crust, ionosphere, magnetosphere, all the way to the Sun. Geomagnetic field is a vector quantity and is described by geomagnetic elements i.e. mutually orthogonal components X (northerly intensity), Y (easterly intensity) and Z (vertical intensity, positive downwards). The elements describing the direction of the field are declination D and inclination I.