Public human health is closely interrelated with the ecological state of the environment, which is especially important for urban areas. The article presents research data on the influence of a number of exogenous factors on population of the town of Vladikavkaz, which is an urbanized mountainous area. Morbidity rates of the population in correlation with the levels of noise, gamma radiation, electric and magnetic fields were studied. The analysis of influence of negative exogenous factors (that exceed permissible levels) has been carried out in areas of the town. The results of implementation of the method of medical-ecological-geophysical zoning are given. The groups of diseases, presumably associated with certain types of external influence, are identified, which together requires the development of targeted measures in order to improve public health and reduce the harmful effects of exogenous factors often of technogenic and anthropogenic nature.

A study of ecogeophysical factors of the environment in Vladikavkaz was carried out at 126 points: indicators of noise pollution, electric fields and the level of gamma radiation were measured. The noise level was determined with the help of noise and vibration meter Ekogeofizika-110A of the domestic company Oktava. It has been defined that the population of Vladikavkaz is subjected to a significant noise period of time, which exceeds the permissible level, which can negatively affect the health of citizens. Measurements of gamma radiation level were made using a gamma radiation dosimeter DBGA-OCHA. According to the obtained data, the population of Vladikavkaz is exposed to the gamma radiation in the range of 0.05–0.18 µSv/h and with an average value of 0.11 µSv/h, which is below the maximum permissible level. In order to study the electric fields, the measurements were carried out by the electric field meter IEP-05. The electric field strength reached up to 1400 V/m at individual measurement points, at an acceptable level of 800 V/m; this indicator exceeds the maximum permissible values.

The article considers the main sources of pollutionin the territory of the Republic of North Ossetia–Alania. A study of environmental geophysical factors in the city of Vladikavkaz was carried out at 126 points; indicators of noise pollution, electric fields and the level of gamma radiation were measured. A geoaccumulation index of heavy metals in soils and indices of carcinogenic and non-carcinogenic risks were calculated and corresponding maps were constructed. The obtained data supporting a high level of carcinogenic risk are consistent with a high level of cancer morbidity in the city, which indicates a close relationship between morbidity and the carcinogenic risk index. It has been determined that emissions from road transport are greater by an order of magnitude than stationary sources emissions, while there is a steady trend towards an increase in air pollution as a result of the increasing negative impact of motor vehicle emissions. It has been established that the most hazardous way for heavy metals to enter the human body from the soil is by inhalation. It has been determined that in areas where environmental pollution with heavy metals is higher, cancer morbidity is also higher.

The article assesses the individual geodynamic situations of the Wilson cycle. These situations formed one or another existing structural-material complex of the main microplates and structural-tectonic zones of the eastern segment of the Central Caucasus. The assessment was carried out on the basis of the concept of the tectonics of lithosphere plates and the corresponding geodynamic regimes. Such regimes are established at the boundary and internal parts of the tectonic plates subjected to various kinds of dynamic effects. Structuralmaterial complexes are differentiated according to the geomorphological, tectonic, sedimentation, igneous bedrock, metamorphic and volcanic features. The mantle effects of vertical and (or) lateral direction on the crust are given. Dynamics of these effects are determined by the convective rising flow of mantle substrate that is heated by outer core. This flow is independent of convective currents jets from the lower and upper floors of the mantle, i.e. plums, according to the model of the double-level tectonics of the lithosphere. The effectiveness of seismic tomography is noted. This method allows constructing models of the mantle density thermal inhomogeneities using velocity propagation characteristics of elastic vibrations. The characteristic of a geodynamic situation is given as a generalization of the particularities of each of the described structural-physical complex.

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