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An Integrated Approach to Geophysical Data Interpretation for Refining the Crystalline Basement Model in the Lena-Tunguska Petroleum Province1 lena -通古斯石油省结晶基底模型精细化的综合地球物理资料解释方法[j]
IF 1 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2026-06-01 DOI: 10.1134/S1069351326700199
S. A. Davydenko, N. V. Misyrkeeva, A. Yu. Davydenko, Yu. A. Agafonov, F. R. Kuklina, V. A. Perova
{"title":"An Integrated Approach to Geophysical Data Interpretation for Refining the Crystalline Basement Model in the Lena-Tunguska Petroleum Province1","authors":"S. A. Davydenko,&nbsp;N. V. Misyrkeeva,&nbsp;A. Yu. Davydenko,&nbsp;Yu. A. Agafonov,&nbsp;F. R. Kuklina,&nbsp;V. A. Perova","doi":"10.1134/S1069351326700199","DOIUrl":"10.1134/S1069351326700199","url":null,"abstract":"<p>Construction of the crystalline basement surface model for the Lena-Tunguska petroleum province was performed based on the results of integrated interpretation of electrical survey data from near-field transient electromagnetic (TEM) soundings and magnetotelluric (MT) soundings, magnetic survey, and gravity survey. Each method is characterized by its own complicating physical-geological factors and ranges of ambiguity in the solutions of inverse problems. It is shown that integrated interpretation of gravitational and magnetic fields allows reducing the ambiguity caused by the lack of a priori information, the variety of structural constructions from previous years, and complex geoelectrical conditions at the regional stage. To delineate 3D heterogeneities based on density and magnetic properties, cascade inversion technology was used. Formation of a generalized model of volumetric distribution of density and magnetic properties was carried out based on structural-material complexes, identified as a result of classification by the classical machine learning method – K-means. The integrated approach increased the reliability of geological interpretation in zones of data complications for TEM and MT. The formed medium models allowed refining the understanding of the presumed structure of the basement surface.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"62 2","pages":"264 - 275"},"PeriodicalIF":1.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148104228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Method for Statistical Detection of Weak Lithospheric Electromagnetic Anomalies amid Anthropogenic Noise 人为噪声下岩石圈弱电磁异常的统计检测方法
IF 1 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2026-06-01 DOI: 10.1134/S1069351326700278
M. S. Petrishchev, V. S. Ismagilov, Yu. A. Kopytenko
{"title":"Method for Statistical Detection of Weak Lithospheric Electromagnetic Anomalies amid Anthropogenic Noise","authors":"M. S. Petrishchev,&nbsp;V. S. Ismagilov,&nbsp;Yu. A. Kopytenko","doi":"10.1134/S1069351326700278","DOIUrl":"10.1134/S1069351326700278","url":null,"abstract":"<p>A method for statistical detection of weak ultra-low-frequency (ULF) electromagnetic anomalies of lithospheric origin amid intense anthropogenic noise is proposed. The method is based on the hypothesis that the statistical distribution of ambient electromagnetic noise amplitudes in the ULF range is stationary over time, whereas an additional signal perturbs this distribution. To validate this method, we conducted a numerical experiment with superimposing a synthetic noise signal onto the magnetic data recorded over a 72-day interval from December 2022 to February 2023 at the Tashkent Geodynamic Polygon. The results demonstrate that a persistent shift in the probability distribution mode of the root-mean-square deviations toward larger values serves as a reliable indicator of an electromagnetic disturbance from a remote source. The method was tested and its applicability was demonstrated for an <i>M</i>6.4 earthquake.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"62 2","pages":"322 - 330"},"PeriodicalIF":1.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148104201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Space Weather Impact on Ground-Based Infrastructure 空间天气对地面基础设施的影响
IF 1 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2026-06-01 DOI: 10.1134/S1069351326700229
D. V. Kostarev
{"title":"Space Weather Impact on Ground-Based Infrastructure","authors":"D. V. Kostarev","doi":"10.1134/S1069351326700229","DOIUrl":"10.1134/S1069351326700229","url":null,"abstract":"<p>Space weather is the set of processes occurring in near-Earth space under the influence of solar activity. This review presents the principal components of space weather, the causes of their formation, and their impacts on Earth. One of the most significant space weather factors is geomagnetically induced currents in technological conducting grounded systems, caused by rapid variations of the geomagnetic field. Extended conducting systems such as power transmission lines, pipelines, and railways are particularly vulnerable. This paper presents the main results of analysis of the effects of geomagnetic disturbances on the operation of power systems, main trunk pipelines, and railway automation. The results confirm the necessity of developing adaptive protection measures. For an adequate assessment of the impact of geomagnetic disturbances, it is necessary to further develop short-term and long-term space weather forecasting systems, local models of Earth’s crustal conductivity, and their integration with real network configurations.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"62 2","pages":"361 - 379"},"PeriodicalIF":1.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148104233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of Step-like Topography on Magnetotelluric Responses: A Three-Dimensional Modeling Study 阶梯状地形对大地电磁响应的影响：三维模拟研究
IF 1 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2026-06-01 DOI: 10.1134/S1069351326700187
V. V. Belyavsky, Iv. M. Varentsov, I. N. Lozovsky
{"title":"Influence of Step-like Topography on Magnetotelluric Responses: A Three-Dimensional Modeling Study","authors":"V. V. Belyavsky,&nbsp;Iv. M. Varentsov,&nbsp;I. N. Lozovsky","doi":"10.1134/S1069351326700187","DOIUrl":"10.1134/S1069351326700187","url":null,"abstract":"<p>This study investigates the influence of stepped topography with relief amplitudes of 1–3 km on magnetotelluric (MT) estimates of subsurface resistivity structure. The analysis is based on 3D finite-difference forward modeling of MT responses. The invariant parameters of the impedance tensor calculated for models with stepped topography are compared to their counterparts in the models with a flat air-ground interface. Based on the comparison, MT data distortions caused by surface topography are estimated. The dependence of apparent resistivity curves calculated on upper and lower benches of the step on the parameters of geoelectric section is analyzed. Modeling results show that, when analyzing deep parts of the geoelectrical structure, invariant apparent resistivity curves from both the upper bench (the plateau) and the lower bench (basin, or trough) require correction if the observation sites are formally referenced to a flat air-earth interface. The findings emphasize the need to explicitly incorporate topography in 3D MT inversion to avoid interpretation bias.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"62 2","pages":"200 - 220"},"PeriodicalIF":1.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148104235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mantle Diapir Model in the Baikal Rift Zone 贝加尔湖裂谷带地幔底辟模式
IF 1 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2026-06-01 DOI: 10.1134/S1069351326700254
D. A. Orekhova, I. V. Popova, M. S. Kruglyakov, S. M. Korotaev, N. M. Budnev, V. Kh. Kiriakov, I. S. Moskalev
{"title":"Mantle Diapir Model in the Baikal Rift Zone","authors":"D. A. Orekhova,&nbsp;I. V. Popova,&nbsp;M. S. Kruglyakov,&nbsp;S. M. Korotaev,&nbsp;N. M. Budnev,&nbsp;V. Kh. Kiriakov,&nbsp;I. S. Moskalev","doi":"10.1134/S1069351326700254","DOIUrl":"10.1134/S1069351326700254","url":null,"abstract":"<p>As part of deep-water monitoring of the vertical electric field component <i>E</i><sub><i>z</i></sub>, long-term observations of magnetic field variations on land in the southern basin of Lake Baikal were also conducted. These observations were used to calculate gradient functions between the reference point (Patrona Observatory) and existing magnetic measurement points over periods ranging from 5.6 min to 24 h. These data were used to compare with model calculations when considering various models of the geoelectric structure of the Baikal Rift Zone (BRZ). The characteristic features of the mantle diapir structure are most pronounced in the southernmost part of the BRZ, with a boundary along the Main Sayan Fault. In general, the diapir structure is sharply asymmetric, with the feeder conduit located under the northwestern periphery of the mantle body. The position of the southeastern boundary of the body requires refinement by expanding the monitoring network.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"62 2","pages":"247 - 253"},"PeriodicalIF":1.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148104237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An Approach to Geometric 3D Inversion of Large-Source Frequency Sounding Data 一种大震源频率探测数据几何三维反演方法
IF 1 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2026-06-01 DOI: 10.1134/S1069351326700266
M. G. Persova, Yu. G. Soloveichik, K. M. Vinogradov, Yu. I. Koshkina, M. D. Romanov
{"title":"An Approach to Geometric 3D Inversion of Large-Source Frequency Sounding Data","authors":"M. G. Persova,&nbsp;Yu. G. Soloveichik,&nbsp;K. M. Vinogradov,&nbsp;Yu. I. Koshkina,&nbsp;M. D. Romanov","doi":"10.1134/S1069351326700266","DOIUrl":"10.1134/S1069351326700266","url":null,"abstract":"<p>An approach to geometric 3D inversion of frequency sounding data in technologies with horizontal grounded source is considered. A description of mathematical models for solving forward and inverse problems with numerical–analytical calculation of sensitivities to the initial model parameters is presented. The results of applying the proposed approach to the inversion of field data, confirming its effectiveness, are also provided. The influence of inhomogeneities in the host medium located laterally with respect to the survey profiles is analyzed. It is shown that the influence of such lateral inhomogeneities can be significant, and neglecting them may reduce the resolution of the technique. An analysis of the induced polarization effect for various signal decay parameters is carried out.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"62 2","pages":"232 - 246"},"PeriodicalIF":1.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148104230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Deep-Water Electromagnetic Monitoring of Processes in Conjugate Geospheres 共轭地圈过程的深水电磁监测
IF 1 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2026-06-01 DOI: 10.1134/S1069351326700205
S. M. Korotaev, N. M. Budnev, V. O. Serdyuk, E. O. Kiktenko, D. A. Orekhova, V. A. Tabolenko
{"title":"Deep-Water Electromagnetic Monitoring of Processes in Conjugate Geospheres","authors":"S. M. Korotaev,&nbsp;N. M. Budnev,&nbsp;V. O. Serdyuk,&nbsp;E. O. Kiktenko,&nbsp;D. A. Orekhova,&nbsp;V. A. Tabolenko","doi":"10.1134/S1069351326700205","DOIUrl":"10.1134/S1069351326700205","url":null,"abstract":"<p>In the southwestern part of Lake Baikal, a long-term experiment has been conducted on continuous high-precision measurements of the vertical electric field component <i>E</i><sub><i>z</i></sub> and signals of macroscopic nonlocal correlation detectors with surface-to-bottom spacing. The sources of the field are located both in- and outside the hydrosphere, making it possible to monitor source processes in the conjugated geospheres. For periods up to 10 days, the field induced by flows dominates. This has made it possible to obtain information about variations in the total transport of synoptic flow. For longer periods, the current field of the global electrical circuit dominates. These variations turned out to be related to variations in the solar X-ray radiation. Signals from detectors of macroscopic nonlocal correlations reveal an advanced response to some regional and global dissipative processes with a large random component. This provides a unique opportunity to forecast such processes, in particular, hydrothermodynamic activity in the active layer of Lake Baikal.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"62 2","pages":"389 - 397"},"PeriodicalIF":1.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148104204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Clustering of Geophysical Data in Comparison with Seismic Activity in the Area of Southern Baikal 南贝加尔湖地区地球物理数据聚类与地震活动对比
IF 1 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2026-06-01 DOI: 10.1134/S106935132670028X
I. V. Popova, D. A. Orekhova, S. M. Korotaev
{"title":"Clustering of Geophysical Data in Comparison with Seismic Activity in the Area of Southern Baikal","authors":"I. V. Popova,&nbsp;D. A. Orekhova,&nbsp;S. M. Korotaev","doi":"10.1134/S106935132670028X","DOIUrl":"10.1134/S106935132670028X","url":null,"abstract":"<p><b>Abstract</b>—Custering of seismic events is a distinctive feature of the Baikal Rift Zone. Such a common spatial location of earthquake sources suggests regularities in the development of seismic activity in the areas of their clustering, which may be related to the physical properties of the environment. The most significant geophysical characteristics describing physical fields include the seismic wave propagation velocities, resistivity, and temperature. The paper considers clustering of each of the listed geophysical parameters as well as their combination using the Kohonen neural network. The identified clusters are compared with data of seismic events in the area under consideration. This method allows studying the contribution and comparative informativeness of the geophysical characteristics of the environment to the formation of a zone of weakness of the crust. Integrated analysis of geophysical data using Kohonen self-organizing maps allowed us to find a set of the most informative geophysical parameters and their values, which turned out to be resistivity and temperature. The integration of these parameters revealed a spatial correlation with the accumulation of seismic events in the area of the Mishikha depression of the South Baikal Basin of Lake Baikal.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"62 2","pages":"331 - 338"},"PeriodicalIF":1.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148104200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Identifying Ultra-Low-Frequency Geomagnetic Precursors of Baikal Rift Earthquakes via Polarization Analysis 利用极化分析识别贝加尔湖裂谷地震的超低频地磁前兆
IF 1 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2026-06-01 DOI: 10.1134/S1069351326700291
M. V. Prikop, I. K. Seminsky
{"title":"Identifying Ultra-Low-Frequency Geomagnetic Precursors of Baikal Rift Earthquakes via Polarization Analysis","authors":"M. V. Prikop,&nbsp;I. K. Seminsky","doi":"10.1134/S1069351326700291","DOIUrl":"10.1134/S1069351326700291","url":null,"abstract":"<p>This paper presents the results of a polarization analysis method in identifying ultra-low-frequency (ULF) precursors of relatively strong earthquakes in the Baikal Rift Zone that occurred between 2014 and 2023. The method utilizes the ratio of spectral power densities of the vertical and horizontal magnetic field components (<i>R</i><sub><i>ZH</i></sub>). To account for global geomagnetic activity, <i>R</i><sub><i>ZH</i></sub> variations were compared against global indices (<i>K</i>p, <i>Dst</i>, SME) and data from remote observatories in similar geomagnetic conditions. Despite isolated instances of <i>R</i><sub><i>ZH</i></sub> increasing before earthquakes, no statistically significant precursors were identified. The probable causes of these results and prospects for further research are discussed.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"62 2","pages":"349 - 360"},"PeriodicalIF":1.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148104203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Inverse Problems of Geoelectrics: Basic Principles and Development Trends 地电学逆问题：基本原理与发展趋势
IF 1 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2026-06-01 DOI: 10.1134/S106935132670031X
M. I. Shimelevich, E. A. Rodionov, I. E. Obornev, E. A. Obornev
{"title":"Inverse Problems of Geoelectrics: Basic Principles and Development Trends","authors":"M. I. Shimelevich,&nbsp;E. A. Rodionov,&nbsp;I. E. Obornev,&nbsp;E. A. Obornev","doi":"10.1134/S106935132670031X","DOIUrl":"10.1134/S106935132670031X","url":null,"abstract":"<p>A systematic review of modern methods for solving inverse problems in geoelectrics is presented. Three main paradigms are considered: a deterministic framework based on Tikhonov regularization, a probabilistic approach based on Bayesian statistical inference, and an approximation strategy based on neural network (NN) method. Particular attention is paid to fundamental aspects of the inverse problem related to solutions non-uniqueness and its dependence on depth of investigation and parameterization density. The evolution of NN approach is analyzed, from classical methods using a simple perceptron to multilayer physics- informed neural networks (PINN) using deep machine learning (DML) techniques. Numerical results are presented.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"62 2","pages":"221 - 231"},"PeriodicalIF":1.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148104229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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