Seismic Instruments最新文献

{"title":"Earthquakes in Turkmenistan and Northern Iran","authors":"V. Yu. Burmin,&nbsp;G. R. Petrosyan","doi":"10.3103/S074792392570063X","DOIUrl":"10.3103/S074792392570063X","url":null,"abstract":"<p>Not many studies have been published on the seismicity of Turkmenistan and Northeastern Iran to date. At the same time, some areas of Turkmenistan are characterized by high seismicity along with the most seismically active zones of the former USSR. It is enough to mention the well-known destructive Ashgabat earthquake, which occurred on October 5, 1948. The article compares the distributions of hypocenters of earthquakes in Turkmenistan obtained from the ISC catalog for the period from 1964 to 2021 and results of recalculating hypocenters from the ISC bulletin for the same period. In total, the ISC catalog for the specified period contains about 4800 events with a magnitude greater than 2.5. The authors recalculated hypocenters of about 3700 earthquakes. It is shown that the depths of earthquake sources in the areas under consideration can be located at depths of up to 600 km, while according to the ISC catalog, the maximum focal depths do not exceed 100 km.</p>","PeriodicalId":45174,"journal":{"name":"Seismic Instruments","volume":"61 6","pages":"459 - 470"},"PeriodicalIF":0.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mounting a Vibration Sensor to the Ground at Subfreezing Temperatures","authors":"V. V. Yepin,&nbsp;G. N. Gusev,&nbsp;R. V. Tsvetkov,&nbsp;A. P. Shestakov","doi":"10.3103/S0747923925700641","DOIUrl":"10.3103/S0747923925700641","url":null,"abstract":"<p>A series of experiments was conducted to measure ground vibrations from impact loads under subzero temperatures using sensors attached to the ground in various ways. The signals were compared based on amplitude and frequency parameters using correlation analysis. The analysis of the results made it possible to estimate the ranges of amplitudes and frequencies of the vertical and horizontal components of vibration signals for each type of sensor mounting. These results make it possible to organize a series of vibration measurements in field and construction site conditions during the winter period in an optimal way.</p>","PeriodicalId":45174,"journal":{"name":"Seismic Instruments","volume":"61 6","pages":"471 - 477"},"PeriodicalIF":0.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamics of Changes in the Stress–Strain State of the Earth’s Crust of the Black Sea Basin in Seismogenesis Models","authors":"Yu. M. Volfman","doi":"10.3103/S0747923925700604","DOIUrl":"10.3103/S0747923925700604","url":null,"abstract":"<p>Changes in geodynamic conditions and, accordingly, the stress–strain state of the Earth’s crust affect the nature of seismic activity in the region. The earthquake focal mechanisms are the direct criteria that make it possible to assess the spatiotemporal changes in the crust and to establish general patterns of the formation of regional seismogenesis. The aim of the artilce is to study the deformation modes and kinematic conditions of regional seismogenesis and to investigate the influence of transformations and inversions of stress fields on the spatial and structural-kinematic characteristics of seismogenic ruptures. Stereographic models of seismogenesis based on the earthquake focal mechanisms, developed and tested by the author in studying seismically active regions, are constructed. The results of tectonophysical analysis of kinematic settings and deformation modes of seismogenesis within the Black Sea Basin are presented. The types of deformation modes of rupture formation in the hearth and kinematic conditions of seismogenesis were used as criteria for the stress–strain state of the crust. Collectively, they reflect the nature of the stressed state of the medium (compression or extension) and the direction of compressive or tensile forces. The influence on the processes of seismogenesis of primary and secondary, transformed of the stress fields. Stereographic quasi-models of seismogenesis are constructed, which approximate the values of the parameters of focal mechanisms formed in identical kinematic settings. The main features of local transformations of stress fields are established. The article provides the specific relations between the parameters of the quasimodels of primary field seismogenesis and similar values of the parameters of earthquake focal mechanisms formed in an identical kinematic setting, but under conditions of transformed stress systems. In all cases, transformations occur by rotation of the stress tensor around the direction of action of one of the principal axes with a change in the position of the other two. Changes in the time of kinematic conditions in earthquake sources of the South Coast and Tuapse–Anapa seismogenic zones of the Crimean–Black Sea region are analyzed. Short-term inversion changes in the kinematic conditions of seismogenesis of two types are investigated. In the first case, compression is replaced by stretching in the same direction (and vice versa). In the second case, one of the principal stress axes, which determines the type of kinematic situation (e.g., compression), changes its direction to perpendicular to its original position. The spatial and kinematic parameters of seismic faults, as well as the general patterns of their formation under the influence of inversion stress fields, have been established.</p>","PeriodicalId":45174,"journal":{"name":"Seismic Instruments","volume":"61 6","pages":"450 - 458"},"PeriodicalIF":0.3,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simulation of Electromechanical Processes in a Solid State Wave Gyroscope with Piezoelectric Transducers","authors":"I. L. Bataronov,&nbsp;G. E. Shunin,&nbsp;S. A. Kostryukov,&nbsp;V. V. Peshkov","doi":"10.3103/S0747923925700586","DOIUrl":"10.3103/S0747923925700586","url":null,"abstract":"<p>The eigenvalue problem and mixed boundary value problem for the electroelasticity equations describing oscillations of the cylindrical resonator of a solid state wave gyroscope with piezoelectric transducers are solved numerically. The spectrum of natural frequencies, the energy and dissipative characteristics of the oscillating resonator, the time dependence of the electric potential on the piezoelectric elements, the level of the background alternating voltage on the receiving piezoelements located at an angle of 45° to the piezoelectric elements of the excitation system are determined. The time it takes for a solid state wave gyroscope to reach its operating mode is esimated.</p>","PeriodicalId":45174,"journal":{"name":"Seismic Instruments","volume":"61 6","pages":"427 - 434"},"PeriodicalIF":0.3,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A New Approach to Reducing the Risk of Large Technogenic Earthquakes Based on the Results of Microseismic Monitoring","authors":"Alina N. Besedina,&nbsp;Gevorg G. Kocharyan","doi":"10.3103/S0747923925700574","DOIUrl":"10.3103/S0747923925700574","url":null,"abstract":"<p>The proposed approach is based on the assumption, known from laboratory experiments, that the current frictional properties of the slip surface are reflected both in the source parameters of individual induced microseismic events and in the characteristics of seismoacoustic noise, the sources of which are localized in the fault zone. The technique is estimates the scaled seismic energy, which makes it possible to judge the probability of the realization of the elastic energy accumulated in a massif in the form of dynamic events. On the example of data recorded at the Korobkovskoe iron ore deposit of the Kursk Magnetic Anomaly, the source parameters of seismic events induced by explosions were estimated. On the basis of the results, it is shown that a swarm of induced microearthquakes with a low rupture propagation velocity was detected at the KMA-ruda mine. The prospects of using machine learning methods to determine the time and magnitude of an impending dynamic event in real time based on the data of laboratory experiments with AE are shown. The results can be used for short-term forecasting of large dynamic events under the conditions of an operating mine. The analysis showed the promise of creating new methods for monitoring stressed massifs during mining operations in order to prevent the initiation of large earthquakes associated with dynamic displacement along tectonic faults.</p>","PeriodicalId":45174,"journal":{"name":"Seismic Instruments","volume":"61 6","pages":"435 - 442"},"PeriodicalIF":0.3,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"OMAR-2S Autonomous Seismic Station for Engineering Work","authors":"V. A. Davydov","doi":"10.3103/S0747923925700598","DOIUrl":"10.3103/S0747923925700598","url":null,"abstract":"<p>A description of the OMAR-2s triaxial portable station for engineering and seismological research is given. To broaden the frequency range of the station, a correction filter is used, which restores the gain of low-frequency components of the signal, weakened by the mechanical system of the seismic receiver. The operation of the functional units of the equipment and results of testing technical characteristics are considered. Particular attention is paid to the study of the level of intrinsic noise. Recommendations are given for the practical use of the seismic station.</p>","PeriodicalId":45174,"journal":{"name":"Seismic Instruments","volume":"61 6","pages":"443 - 449"},"PeriodicalIF":0.3,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On Expansion of the Seismic Observation Network in the Republic of North Ossetia–Alania","authors":"A. A. Sayapina,&nbsp;T. V. Chivieva,&nbsp;M. S. Pyatunin","doi":"10.3103/S0747923925700562","DOIUrl":"10.3103/S0747923925700562","url":null,"abstract":"<p>In 2019 and 2021, the seismic observation network of the North Osetia Branch of the Geophysical Survey of the Russian Academy of Sciences, was expanded in the Republic of North Ossetia–Alania. In addition to the existing seismic network, two new digital seismic stations were opened in the Mairamadag and Popov Khutor settlements to increase a sensitivity of the seismic network in the Vladikavkaz seismic source zone. This paper provides the data on location sites chosen for new observation points, specifications of the installed equipment, and estimated noise spectral power of each new station in comparison with the average Peterson global noise curves. In addition, the velocity profiles were constructed for each new station site by the surface wave spectral analysis. The example of a weak earthquake was used to show that the new stations made it possible to record those seismic events in the Vladikavkaz seismic source zone, which would remain unnoticed with the use of the previous network configuration.</p>","PeriodicalId":45174,"journal":{"name":"Seismic Instruments","volume":"61 6","pages":"410 - 417"},"PeriodicalIF":0.3,"publicationDate":"2026-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Problem of Reconstructing the Inhomogeneity Parameters of a Two-Dimensional Body from Acoustic Field Measurement Results","authors":"M. Yu. Medvedik,&nbsp;O. V. Kondyrev","doi":"10.3103/S0747923925700549","DOIUrl":"10.3103/S0747923925700549","url":null,"abstract":"<p>Inverse problems requiring solutions arise in many areas of science and technology, such as medicine, manufacturing, etс. The main aim of the present paper is to formulate and solve an inverse problem, analyze solutions depending on the introduced noise and frequency of the source, and develop an algorithm of filtering solutions. We have obtained an integral equation of the first kind from measurement results at observation points. The wave number function of a body can be calculated using the formula and the result from solving the integral equation. A two-step method of reconstructing inhomogeneities of the body was applied. A solution of the problem depending on introduced errors was investigated. The algorithm for filtering noisy data was considered. Solving the problem using this method allows reconstruction of the internal structure of the body. The filtering method can help distinguish real inhomogeneities from noise.</p>","PeriodicalId":45174,"journal":{"name":"Seismic Instruments","volume":"61 6","pages":"405 - 409"},"PeriodicalIF":0.3,"publicationDate":"2026-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Performance Analysis of Electrical Resistivity Tomography Software Packages for Field Data Interpretation in the Seismically Active Areas (a Case Study of Gorny Altai)","authors":"I. O. Shaparenko,&nbsp;N. N. Nevedrova,&nbsp;A. V. Marinenko,&nbsp;I. V. Surodina","doi":"10.3103/S0747923925700550","DOIUrl":"10.3103/S0747923925700550","url":null,"abstract":"<p>Employees of the Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch, Russian Academy of Sciences, have carried out regular geoelectrical surveys in the Gorny Altai region since 2004. Electrical resistivity tomography is used to construct geoelectric models of the section’s upper part to a depth of a few tens of meters. One of its important objectives is to determine the fault zone parameters. Large regional Cenozoic faults characterized by a high displacement amplitude are usually well-defined in the terrain. Intradepression interblock faults covered by sedimentary deposits are hard to identify by geological methods, but according to the electrical resistivity tomography data, they are characterized mainly by low electrical resistivity zones in the sections. Practical application of the electrical resistivity tomography to study the Gorny Altai fault structures have been considered. Analysis of the accumulated field data has made it possible to create typical models of the fault structures in the area under consideration. We have compared the synthetic data inversion results obtained through numerical modeling of the Gorny Altai fault zones using well-known software and our own development works. The capabilities of different software packages used to interpret the electrical resistivity tomography data have been analyzed.</p>","PeriodicalId":45174,"journal":{"name":"Seismic Instruments","volume":"61 6","pages":"418 - 426"},"PeriodicalIF":0.3,"publicationDate":"2026-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Earthquake Source Zone Model and Prediction of Strong Ground Motion Parameters","authors":"O. O. Erteleva,&nbsp;F. F. Aptikaev","doi":"10.3103/S0747923925700410","DOIUrl":"10.3103/S0747923925700410","url":null,"abstract":"<p>Prediction of the quantitative parameters of seismic ground motion, based on studies of strong ground records, is the final part of a set of works on assessing the seismic hazard of any territory. At the same time, the results of studying the processes of seismic wave generation and propagation in the near fields of earthquakes are of great importance for the physics of the earthquake source, being the basis for constructing an adequate model of the source and the processes occurring in it. The regularities of propagation of a seismic wave field are expressed in the equations of the relationship between the parameters of seismic vibrations and characteristics of the source and the medium. These equations can be obtained both from the theoretical positions available in today’s seismological science and from analysis of accumulated data of strong ground records. It does not require proof that the interpenetration of these two methods is the most useful for scientific progress. The trend of recent decades in the development of equations for predicting the parameters of strong ground motions is identification of several zones in the wave field with different dependences on the parameters of the medium and source. The predictive ratios obtained using this method is distinguished by a decrease in the scatter of estimates of the fluctuation parameters and compliance with empirical data. When processing statistical data using dimension and similarity theory, it was found that in the field of seismic waves, there are similar distances at which the values of the oscillation parameters are similar. In other words, there are laws for scaling the seismic ground motion parameters. A similar statement can be found in theoretical studies on generation of seismic waves by an earthquake source. The aim of the study is, using theoretical provisions on processes in the source area, to establish the laws of generation and propagation of the parameters of strong ground movements, taking into account empirical data; to develop a model of the source zone that does not contradict empirical data; and to determine the size of the earthquake source zone. The research methodology involves statistical analysis of empirical data on strong ground motion. The results yielded are attenuation equations for the amplitudes of peak ground accelerations in the fault, near-, and far-field zones; predictive equations for the prevailing periods and duration of fluctuations of strong ground motion; and estimates of the sizes of the earthquake source zone.</p>","PeriodicalId":45174,"journal":{"name":"Seismic Instruments","volume":"61 4","pages":"314 - 320"},"PeriodicalIF":0.3,"publicationDate":"2025-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145786421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}