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The article discusses the features of temperament and its indicators in firefighters of different groups of professionalism. Temperament is understood in accordance with the formal-dynamic concept of V. M. Rusalov, which highlights the formal-dynamic properties of the individual: ergic, plasticity, speed, emotionality. The sample consisted of 210 firefighters, divided into three groups of professionalism: firefighters-mentors, firefighters of the 1st class, firefighters of the 2nd class. A questionnaire for determining V. M.’s temperament was used. Rusalova, methods of mathematical statistics: the Kruskal-Wallace method and ANOVA analysis of variance. The features of the development of temperament indicators in various groups of firefighters are revealed. The main results of the study are described, indicating that there are indicators (social tempo, tempo, social ergicity, ergicity) that are common to all groups of firefighters. At the same time, some indicators of temperament (social plasticity and emotionality) differ in severity in certain groups of firefighters: social plasticity dominates in class 2 firefighters, and emotionality – in class 1 firefighters.

Abstract—The possibility of remote studying the electromagnetic and ionospheric effects of the eruption of the Tonga volcano on January 15, 2022 is demonstrated. At distances up to 15000 km from the source, geomagnetic variations associated with Schuman resonance (SR) perturbations, propagation of Lamb wave and acoustic-gravity waves were detected. It is shown that the formation of a high-power source of thunderstorm activity caused by the eruption resulted in a significant (more than threefold) increase in the amplitude of geomagnetic disturbances at SR frequencies, which correlates with the number of lightning events. The effect of the eruption on the frequency characteristics of the SR was not detected. [ABSTRACT FROM AUTHOR]

The study is devoted to the analysis of geomagnetic field disturbances and the response of the Schumann resonance (SR) during the eruption of the Tonga volcano in 2022. The data on geomagnetic field variations at distances from 800 to 15,000 km from the volcano according to the INTERMAGNET network and parameters of SR signals recorded at Mikhnevo Observatory in Russia were used. The source of global geomagnetic disturbances are acoustic–gravity waves (AGWs), which caused changes in ionospheric conductivity, values of ionospheric currents, and the geomagnetic field. The propagation velocity of magnetic disturbances 263 ± 5 m/s, corresponding to the AGWs velocity, was determined and an independent estimate of the time of the eruption phase that caused the generation of the atmospheric wave (4:14 ± 10 UT) was obtained. A new method of processing the results of measurements of SR disturbance with a time resolution of 5 min instead of the usual 10–15 min allowed not only to detect but also to study this phenomenon in detail. The peculiarities of signals related to the number and energy of lightning discharges were revealed. Synchronous measurements of SR signals and geomagnetic field variations in a single observatory for the first time allowed to obtain an independent estimate of the eruption time and the electromagnetic disturbance propagation rate. Plain Language Summary: The eruption of the Tonga volcano on 15 January 2022 caused global disturbances in the geomagnetic field and Schumann resonances. The paper shows that the source of disturbance of Schumann resonances during the eruption was increased thunderstorm activity in the volcanic cloud. Disturbances in the geomagnetic field are caused by acoustic‐gravity waves resulting from the eruption. A comprehensive analysis of the data made it possible to determine the time of the beginning of the eruption. Key Points: The eruption of the Hunga Tonga‐Hunga Haapai volcano in January 2021 caused global atmospheric and electromagnetic perturbationsTime of geomagnetic disturbances at distances 800–16,000 km from volcano showed the velocity of their propagation 263 m/s typical for acoustic–gravity wavesThe time difference between geomagnetic disturbance and Schumann resonance response at one point gives an independent estimate of their propagation velocity [ABSTRACT FROM AUTHOR]

The interference of electromagnetic signals from lightning discharges in the frequency range below 100 Hz is the source of a global electromagnetic phenomenon in the Earth's atmosphere known as the Schumann resonance (SR). Changes in the parameters of SR signals caused by geophysical disturbances make it possible to study the state and dynamics of the lower ionosphere. When calculating the SR parameters, there are problems associated with the impact of electromagnetic interference of natural and anthropogenic origin. The main natural sources of interference are signals associated with the radiation of nearby lightning discharges, as well as the influence of the Alfvén ionospheric resonator. The paper presents a new method for calculating the SR parameters, which makes it possible to find the spectra distorted by interference, mention above, and exclude them from further processing. The developed technique significantly increased the temporal resolution of the obtained data on the frequency and amplitude of the SR. Due to this, it became possible to study the influence of fast heliogeophysical disturbances (such as solar X‐ray flares) on the lower ionosphere and, as a consequence, on the parameters of the SR. An analysis of the experimental data made it possible to establish a linear dependence of the SR frequency on the logarithm of the X‐ray flux in the range up to 0.2 nm during a class X solar flare. Key Points: A new method for calculating the parameters of Schumann resonance (SR) significantly reduces the impact of electromagnetic interferenceThe developed technique increased the temporal resolution of the SR frequency and amplitude dataThe new technique made it possible to establish the dependence of the SR frequency on the X‐ray flux with a wavelength of less than 0.2 nm [ABSTRACT FROM AUTHOR]