[Synchronization in human heart rate dynamics and Pc5 geomagnetic pulsations at different latitudes]

Eight experiments were conducted in synchronized monitoring of cardiac indices in six healthy women at rest simultaneously in three geographic locations--Sofia, Moscow and Arkhangelsk. Comparing spectra of the dynamic time series of the pulse and variations in the horizontal component of the geomagnetic field vector in the frequency range of Pc5 geomagnetic pulsations showed that the main oscillation periods represented in physiological and geophysical time series at each time moment largely coincide. This effect was observed roughly to an equal extent for volunteers who underwent the measurements in all three geographic locations.