Abstract
Repeated detailed mapping of values of electric field strength and magnetic induction on 2 streets in the historic center of St. Petersburg is executed. Measurements were carried out according to the existing methodical requirements and taking into account time of peak loadings of the power supply network. The individual binding of points of measurements naturally increases detail of the final map. Excesses of hygienic standards are not revealed, but the values of magnetic induction exceeding approximate safe levels according to results of foreign researches are widespread. The influence of concrete local sources of electromagnetic fields, such as signs, objects of ventilation, lighting, electrical wiring found reflection is presented by maps. The non-standard sources of electromagnetic fields in the form of large metal designs fixed to facades of buildings and subject to electrization are revealed. Growth of values of electric field strength and magnetic induction from the warm period to cold is noted.
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