Variableness of geomagnetic field strength disturbances during last seven thousands years

Analysis of the geomagnetic field intensity change in the regions of Georgia and Bulgaria showed that the intensity change picture may be expressed as superposition of five changes with periods of 8000 up to 800 years and a number of short-period variations with periods below 600 years. The total range of short-period changes is changed by four times during the period under consideration. The changes are of the pulsation kind. The minimum range of the intensity change of the geomagnetic field in the variation periods under investigation is related to the time periods coinciding with the 1500-year variation, following the maxima of the the 3500-year field intensity variation