Geomagnetic activity effects on human organism in nonstationary extreme conditions; Comparison with laboratory observations

It was hypothetized based on previous laboratory observations and theoretic al concepts that astronauts working at the "Mir" station under zero gravity conditions exhibit enhanced sensitivity to geomagnetic disturbances. The r esulte of studies made it possible to reveal the dynamics of changes in car diovascular characteristics separately in the main phase and the phase of s torm restoration. A similar dynamics of cardiac activity was observed in ex perimental rabbits during geomagnetic storms.