Аннотация:The correlation between the normal and tangential components of the fluctuation geomagnetic field is investigated using the approximation of a plane vacuum layer. It is found that, within the framework of this approximation, the correlation between the normal and tangential components of the field, penetrating through the poorly conducting mantle from the outer core, equals zero. It is assumed that only the normal component penetrates through the boundary between the core and the mantle.