Sv. Dimitrova* and I. Stoilova *
Solar Terrestrial Influences Laboratory, Bulgarian Academy of Sciences, Acad. G. Bonchev Str. Bl. 3 Sofia 1113
(Received 16 July 2002; accepted 3 October 2002)
Abstract: Geomagnetic variations of solar origin correlate with appearance of physiological problems, enhanced anxiety, sleep disturbances, altered moods, and greater incidences of psychiatric admissions. We have studied the influence of changes in geomagnetic activity (GMA) on human physiological, psycho-physiological parameters and behaviour reactions. In this article we looked for influence of changes in geomagnetic activity on the systolic, diastolic blood pressure, pulse-rate and subjective complaints and we examined 54 working volunteers. Four-way analysis of variance (MANOVA method) with factors: GMA, day, sex (males/females) and medicaments has been performed. When we employed four-way analysis of variance, the influence of some of the factors on the physiological parameters examined turned out to be statistically significant (p<0.05). Our investigations indicate that most of the persons examined irrespectively to their status could be sensitive to the geomagnetic disturbances and the results impose the necessity of systematic investigations in this field.