Abstract
In the summer of 2025, the central part of Murmansk, including residential areas, recreational areas, and green zones, was the site of an instrumental study of industrial-frequency electromagnetic fields. Values exceeding the standards established in Russia were found in a few locations. In addition, 12.8 % of the measurement points exceeded the approximate safe level of magnetic induction of 200 nT recommended in modern foreign studies. The highest values, 100 – 200 nT or more, are confined to areas located to the east and northeast of the commercial port, as well as in the area of Akademika Knipovich Street and the New Plateau microdistrict. In the immediate vicinity of ground and overhead cables, etc., grid facilities have, in isolated cases, significantly higher (abnormal) values. Among green spaces and in recreational areas, the values of magnetic induction are minimal, ranging up to 10 Nt. Increased values of electric fields (on the order of hundreds of V/m) were noted only near 35 kV power transmission lines. Based on the results of the study, a map was created using the isoline method. The distribution of magnetic induction values shown on the map reflects the characteristics of the natural and technogenic environment of the city.
Keywords: electromagnetic fields, electric fields, intensity, magnetic fields, magnetic induction, mapping, Murmansk
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