The use of powerful blasts during mining operations in open pit mines results in environmental pollution of the air both inside and outside the pit. The dynamics of wind interaction with the pit surface and the spread of blast dust are investigation by numerical methods. The vertical stratification of the flow in the area of space bounded by the pit sides into lower and upper zones of different vortex structures is demonstrated in a model setting (two-dimensional geometry, constant incoming stratified wind, model profile of a deep (500 m) open pit mine). It is shown that the temperature inversion region is formed inside the pit in the vicinity of the boundary between the zones. The propagation of the dust cloud formed by a powerful explosion on the bench of the windward side of a pit is investigated. It is shown that part of this cloud, initially located in the lower zone, is carried by vortex flows towards the opposite side and does not go beyond this zone, remaining inside the pit. The only way to clean the pit is by slowly flow of air escape along the top of the windward side. Dust from this pathway travels downwind along the surface, contributing to pollution in areas away from the pit.

The reliability of determining the time trend of the travel time of longitudinal waves P excited by nuclear explosions at the Nevada Test site and recorded at the BRVK seismic station was assessed based on multiple regression analysis supplemented by the initial sampling method. It is shown that the contribution of the time factor to the variations in the travel times of the P waves according to observations of 248 explosions at the BRVK station is statistically significant, the trend value is 4.31 ± 0.8 ms/year, although its share in 
the travel time variations is less than 0.1%. When the explosions at Yucca Flat and Pahute Mesa were evaluated separately, the trend values were 3.18 ± 1.15 and 4.24 ± 1.23 ms/year, respectively.

 The impact of the Sun on the Earth is not limited to the fact that during a solar flare a stream of particles is «spit out» and then «hits» our planet, but requires clarification of many fundamental physical phenomena, without an idea of which the solar-terrestrial connections cannot be understood. In a review aimed at non
specialists in space physics, we discuss what space weather is and for whom and for what it can be dangerous. Space weather disturbances affect satellite and ground-based technological systems, so at least a superficial understanding of the mechanisms of such an impact is necessary for those who deal with such systems.

The Zhamanshin meteorite impact crater (Kazakhstan, 48°37' N, 61°94' E, diameter 5.5–13.0 km, age 0.8–1.0 million years) continues to attract the attention of researchers. Craters formed as a result of an asteroid impact on the Earth’s surface are characterized by the presence of a magnetic field anomaly. The results of numerical modeling of the magnetic anomaly of the Zhamanshin crater are presented based on the ideas about the volume and magnetic properties of rocks containing solidified impact melt buried inside the crater. The obtained results correspond to the general picture of the magnetic anomaly of the crater under study.

The elementary theory of aftershocks, being relatively simple mathematically, belongs to the basics of earthquake physics. The paper briefly outlines the concepts and ideas of the theory, provides equations for the relaxation of the source after the main shock, and emphasizes the effectiveness of the theory in the search for new approaches to the processing and analysis of aftershock observation data. The main attention 
is paid to the discussion of two new results obtained on the basis of elementary theory. Firstly, a two-stage relaxation mode of the earthquake source was discovered. In the first stage, called the Omori epoch, the Omori law is strictly observed. The first stage ends with a bifurcation of the source, and the second stage of relaxation begins, during which the evolution of aftershocks proceeds chaotically. Secondly, within the framework of the elementary theory of aftershocks, a fundamentally new concept of the proper time of the source was introduced. The source proper time has proven useful in experimental studies of seismic activity.

 The paper presents the results of express analysis of the late coda of the Myanmar earthquake by seismic interferometry method. Anomalies corresponding to waves I1*, I2*, c*, ScS*, are observed in the calculated correlograms based on data from 880 world stations. It is shown that the travel time features of the I2* correspond to anisotropy with a fast axis in the direction of the Earth rotation axis. On the correlograms of the stations for the Alaska region, the I2* wave is weakly expressed, which is probably related to attenuation in the inner core.

We consider the results of instrumental registration of geophysical effects in the surface atmosphere caused by a strong 7.7 earthquake in Myanmar on March 28, 2025. It is shown that the earthquake caused microbaric variations in the atmosphere, as well as variations in the magnetic and electric fields at significant distances from the seismic event source. In this case, the disturbance of the magnetic and electric fields is recorded both during the period of the main shock and during the arrival at the observation point of the infrasound signal propagating in the atmospheric waveguide. It was found that the earthquake led to an increase in the GPS positioning error at an epicentral distance of ~ 6008 km from the earthquake source. The analysis of the results of ionospheric sounding of free access obtained at the Okinawa station showed the presence of the ionospheric earthquake effect in the form of a variation in the critical frequency of the ionospheric F2 layer. These data once again demonstrate the influence of phenomena and processes occurring in the lithosphere on the atmosphere and ionosphere. 

The article analyzes the tidal situation in the source at the time of the seismic event in Myanmar on March 28, 2025. According to the data of the Baksan laser interferometer-strain meters, the modes of the free oscillations of the Earth excited by these earthquakes in the frequency range corresponding to periods of 4–10 minutes are identified. A comparative characteristic of the obtained periods of the modes is given relative to the theoretical values of zero overtones of spheroidal and toroidal modes.