The distribution of urban anthropogenic magnetic noise depending on the distance: case study for Yekaterinburg

Abstract

The author used Yekaterinburg as an example to consider the spatial distribution of urban anthropogenic magnetic noise within the frequency range between 0.01−200 Hz and 0.01−45 Hz with increasing distance from the city's centre. The paper shows that high amplitudes of the magnetic noise of the city's central part are mainly related to pulse signals generated by electric transport (trams, trolleybuses, trains, metro), which hundreds of times exceed the noise level on the city outskirts and thousands of times exceed the geomagnetic variations. Lack of powerful local anthropogenic sources causes decrees in magnetic noise that continues over a distance of ~20−25 km far from the city's centre.