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Izvestiya, Physics of the Solid Earth最新文献

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Electromagnetic ULF Fields from an Underground Seismic Source on the Earth Surface and in the Ionosphere 来自地球表面和电离层地下地震源的电磁超低频场
IF 0.9 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2024-07-11 DOI: 10.1134/S1069351324700289
N. G. Mazur, E. N. Fedorov, V. A. Pilipenko, K. E. Borovleva
{"title":"Electromagnetic ULF Fields from an Underground Seismic Source on the Earth Surface and in the Ionosphere","authors":"N. G. Mazur,&nbsp;E. N. Fedorov,&nbsp;V. A. Pilipenko,&nbsp;K. E. Borovleva","doi":"10.1134/S1069351324700289","DOIUrl":"10.1134/S1069351324700289","url":null,"abstract":"<p><b>Abstract</b>—A theoretical formalism has been developed to calculate the electromagnetic fields generated in the atmosphere–ionosphere system by a finite-length underground horizontal current source. A numerical model with a realistic profile of the ionosphere in a vertical geomagnetic field has been constructed based on this theory. It is shown that the apparent impedance of the electromagnetic field produced by an underground source on the Earth surface is an order of magnitude higher than the Earth impedance; this can be used to discriminate perturbations from seismogenic sources. The presented results of numerical modeling allow us to relate perturbations created by a large-scale underground source in the magnetic field of the Earth surface and in the electric field in the ionosphere. Based on these model estimates, it is concluded that many of the ULF electric field perturbations detected in satellite data prior to earthquakes cannot be attributed to direct emission from seismogenic sources.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"60 2","pages":"226 - 235"},"PeriodicalIF":0.9,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141609091","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
Heterogeneity Effect of Elastic Properties on Piezomagnetic Fields Associated with Dislocation Source 弹性特性对与位错源有关的压磁场的异质性影响
IF 0.9 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2024-07-11 DOI: 10.1134/S1069351324700381
Chengke Song,  Bin Chen
{"title":"Heterogeneity Effect of Elastic Properties on Piezomagnetic Fields Associated with Dislocation Source","authors":"Chengke Song,&nbsp; Bin Chen","doi":"10.1134/S1069351324700381","DOIUrl":"10.1134/S1069351324700381","url":null,"abstract":"<p>Elastic properties in the medium can affect piezomagnetic fields. In the paper, the heterogeneity effect of elastic properties on piezomagnetic fields has been investigated by constructing different dislocation models. The results show that the burial depth of the source and elastic properties in near-surface layer affect the heterogeneity effect significantly. However, the heterogeneity effect can be neglected when the dislocation source is buried under 5 km depth. When the dislocation reaches the surface, the heterogeneity effect mainly depends on the elastic properties in the near-surface layer. The smaller the elastic properties in the near-surface layer, the larger heterogeneity effect. The non-uniform slip model can reduce the heterogeneity effect.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"60 2","pages":"325 - 332"},"PeriodicalIF":0.9,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141609099","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 Water Saturation of the Medium on the Productivity of Mining-Induced Seismicity: A Case Study of the Khibiny Massif 介质水饱和度对采矿诱发地震生产力的影响：基比尼山丘案例研究
IF 0.9 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2024-07-11 DOI: 10.1134/S1069351324700307
A. Yu. Motorin, S. A. Zhukova, S. V. Baranov, P. N. Shebalin
{"title":"Influence of Water Saturation of the Medium on the Productivity of Mining-Induced Seismicity: A Case Study of the Khibiny Massif","authors":"A. Yu. Motorin,&nbsp;S. A. Zhukova,&nbsp;S. V. Baranov,&nbsp;P. N. Shebalin","doi":"10.1134/S1069351324700307","DOIUrl":"10.1134/S1069351324700307","url":null,"abstract":"<p><b>Abstract</b>—The effect of water saturation of the medium on the property of earthquakes to trigger other earthquake shocks (earthquake productivity) is studied using the long-term seismological observations and water inflow monitoring data in the Khibiny massif ore deposits. The analysis indicates that water saturation of the medium is a significant factor affecting the productivity of earthquakes.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"60 2","pages":"189 - 199"},"PeriodicalIF":0.9,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141609174","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
Air Flow Circulation as a Possible Cause of Preseismic Anomalies in the Near-Surface Electric Field 气流循环是近地表电场震前异常的可能原因之一
IF 0.9 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2024-07-11 DOI: 10.1134/S1069351324700344
V. V. Surkov
{"title":"Air Flow Circulation as a Possible Cause of Preseismic Anomalies in the Near-Surface Electric Field","authors":"V. V. Surkov","doi":"10.1134/S1069351324700344","DOIUrl":"10.1134/S1069351324700344","url":null,"abstract":"<p>Ground-based measurements of the vertical atmospheric electric field of the Earth sometimes show bay-like anomalies that precede some earthquakes. In some cases, these anomalies have even been accompanied by a change in the sign of the field under fair weather conditions. Possible causes of this phenomenon are typically attributed to anomalous changes in the electrical conductivity in the near-surface atmospheric layer, increased radon emission from the soil, etc. This paper proposes another mechanism of atmospheric electrical anomalies, which involves the entrainment of charged aerosols as well as light and heavy ions by air flows. Such flows can be produced due to small temperature anomalies observed before some seismic events. Theoretical analysis shows that anomalously strong electrical variations may occur even in the presence of weak air flows provided that they persist for a long time and a peculiar structure of the velocity field, which presumes vertical air circulation and particle exchange between different atmospheric layers. For this type of flows, an analytic solution is derived and spatial distributions of atmospheric electric perturbations are obtained. The results of calculations and estimates confirm that the proposed mechanism can explain the observation data.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"60 2","pages":"214 - 225"},"PeriodicalIF":0.9,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141609090","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
Velocity Structure of the Upper Crust and Its Geological Significance in the Jiaodong Area, China 中国胶东地区上地壳的速度结构及其地质意义
IF 0.9 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2024-07-11 DOI: 10.1134/S106935132470037X
J. C. Shen, H. X. Wu, S. Yao
{"title":"Velocity Structure of the Upper Crust and Its Geological Significance in the Jiaodong Area, China","authors":"J. C. Shen,&nbsp;H. X. Wu,&nbsp;S. Yao","doi":"10.1134/S106935132470037X","DOIUrl":"10.1134/S106935132470037X","url":null,"abstract":"<p>We determined the velocity structure of the upper crust in the Jiaodong area using double difference seismic tomography, and found that the Jiaodong inland area near the surface (0–5 km) is mainly characterized by high-velocity anomaly, and there are several obvious low-velocity anomalies in the Bohai Sea. The Queshan metamorphic core complex shows obvious low-velocity anomaly at the depth of 5–15 km, and the southern part of the Linglong shows low-velocity anomaly at the depth of 10–20 km. It indicates the existence of significant mantle material upwelling and magmatic activity beneath metamorphic core complex. The Linglong and Queshan metamorphic core complex may be still in the process of uplift. The high-velocity anomaly of the Wulian-Yantai fault is likely closely related to the basic to ultrabasic rocks from the mantle. The basic to ultrabasic rocks upwelling along the Wulian-Yantai fault zone is segmented and mainly concentrated in the southern of the fault zone.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"60 2","pages":"314 - 324"},"PeriodicalIF":0.9,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141609098","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
Analysis of Spatial Clustering of Seismic Events Using DPS Topological Filtering Algorithm: Baikal Region 利用 DPS 拓扑过滤算法分析地震事件的空间聚类：贝加尔地区
IF 0.9 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2024-07-11 DOI: 10.1134/S1069351324700319
A. K. Nekrasova, A. S. Agayan, V. G. Kossobokov
{"title":"Analysis of Spatial Clustering of Seismic Events Using DPS Topological Filtering Algorithm: Baikal Region","authors":"A. K. Nekrasova,&nbsp;A. S. Agayan,&nbsp;V. G. Kossobokov","doi":"10.1134/S1069351324700319","DOIUrl":"10.1134/S1069351324700319","url":null,"abstract":"<p><b>Abstract</b>—The paper presents the results of applying the Discrete Perfect Set (DPS) topological filtering algorithm to analyze the spatial clustering of seismic epicenters in the Baikal region. The study in based on the earthquake data recorded by the seismic network of the Baikal Branch of the Geophysical Survey of the Russian Academy of Sciences in the region between (48° N, 58° N) and (99° E, 122° E) from 1964 to 2018. Clustering characteristics are obtained for (i) the recording period from 1989 to 2018 with different parameters of the DPS algorithm and four levels of the minimum energy class <i>K</i><sub>Р</sub> of seismic events and (ii) six nonoverlapping time intervals from 1964 to 2018 and seismic events of energy class <i>K</i><sub>Р</sub> ≥ 8.6 with fixed parameters of the DPS algorithm. The dynamics of the clustering parameters from 1964 to 2018 possibly characterizes the variability of seismicity in the region. Namely, the decrease in the linear size of the identified groups of epicenters from about a thousand km to tens km may indicate a significant change in seismic activity in the Baikal region at the end of the 1990s and the beginning of the 2000s compared to the period between 1964 and 1997.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"60 2","pages":"200 - 213"},"PeriodicalIF":0.9,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141609175","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
Estimation of Frequencies and Splitting of 2S1 and 3S1 Modes after the 2013 Sea of Okhotsk Earthquake from IGETS Superconducting Gravimeter Network Data 从 IGETS 超导重力仪网络数据估算 2013 年鄂霍次克海地震后 2S1 和 3S1 模式的频率和分裂情况
IF 0.9 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2024-07-11 DOI: 10.1134/S1069351324700277
M. P. Vinogradov, V. K. Milyukov
{"title":"Estimation of Frequencies and Splitting of 2S1 and 3S1 Modes after the 2013 Sea of Okhotsk Earthquake from IGETS Superconducting Gravimeter Network Data","authors":"M. P. Vinogradov,&nbsp;V. K. Milyukov","doi":"10.1134/S1069351324700277","DOIUrl":"10.1134/S1069351324700277","url":null,"abstract":"<p>For the first time, the <sub>2</sub>S<sub>1</sub> and <sub>3</sub>S<sub>1</sub> modes of the Earth’s free oscillations after the largest deep-focus earthquake in the Sea of Okhotsk on May 24, 2013 have been analyzed based on the method of maximum likelihood estimation (MLE). Data from 14 superconducting gravimeters of the IGETS network deployed in the central part of Europe are used. Estimates are obtained for the time of mode excitation relative to the earthquake origin time, degenerate frequencies, and mode splitting parameters.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"60 2","pages":"236 - 246"},"PeriodicalIF":0.9,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141609093","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 Structure of the Baikal Rift Zone and Central Mongolia 贝加尔裂谷带和蒙古中部的深层结构
IF 0.9 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2024-07-11 DOI: 10.1134/S1069351324700265
L. P. Vinnik, L. L. Delitsyn, L. I. Makeyeva, S. I. Oreshin
{"title":"Deep Structure of the Baikal Rift Zone and Central Mongolia","authors":"L. P. Vinnik,&nbsp;L. L. Delitsyn,&nbsp;L. I. Makeyeva,&nbsp;S. I. Oreshin","doi":"10.1134/S1069351324700265","DOIUrl":"10.1134/S1069351324700265","url":null,"abstract":"<p>The upper mantle and the transition zone of the Baikal rift zone (BRZ) are studied. The observations are analyzed from <i>P</i>-wave receiver functions. It is found that in the BRZ central and northeastern part, the <i>P</i>410<i>s</i> converted seismic phase is preceded by a precursory wave with negative polarity which is formed in the low <i>S</i>-wave velocity layer at a depth of 350–410 km. A similar precursory wave with low <i>S</i>-wave velocity and negative polarity is formed at a depth of 600–660 km. The low-velocity layers are interpreted as resulting from the hydration of wadsleyite and ringwoodite during the subduction of the Pacific lithosphere. A similar study of the mantle in Central Mongolia found no expected signs of hydration. The modeling of the lithosphere–asthenosphere system in Central Mongolia by joint inversion of the body wave receiver functions and surface wave dispersion curves reveals a very thin lithospheric lid beneath Khangai and a thick layered asthenosphere down to a depth of 200 km with a lithospheric inclusion between low-velocity layers.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"60 2","pages":"179 - 188"},"PeriodicalIF":0.9,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141609173","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
Comparative Analysis and Unified Derivation of Reissner’s Equations for 2D Bending of Thick Plates and Timoshenko’s Equations for Bending of Beams 厚板二维弯曲的赖斯纳方程与梁弯曲的季莫申科方程的对比分析和统一推导
IF 0.9 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2024-07-11 DOI: 10.1134/S1069351324700356
V. P. Trubitsyn, A. P. Trubitsyn
{"title":"Comparative Analysis and Unified Derivation of Reissner’s Equations for 2D Bending of Thick Plates and Timoshenko’s Equations for Bending of Beams","authors":"V. P. Trubitsyn,&nbsp;A. P. Trubitsyn","doi":"10.1134/S1069351324700356","DOIUrl":"10.1134/S1069351324700356","url":null,"abstract":"<p>Currently, bending deformations of lithospheric plates are calculated based on Kirchhoff’s theory of bending of thin plates, which was formulated about 170 years ago. This paper examines the possibility of refining these calculations based on the theory of bending of thick plates developed by Timoshenko and Reissner. A new unified derivation is presented of the Timoshenko equations for 2D bending of beams and the Reissner equations for bending of slabs by direct transformation of the general elasticity equations with a simple approximate replacement of power-cubic functions with effective linear ones. This allows a more detailed and clearer understanding of the differences between the equations and the sense of the simplifications made in these theories. By comparing the analytical solutions of the Timoshenko and Reissner equations with the known test analytical solutions of the exact elasticity equations, quantitative estimates of the accuracy of these theories are given.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"60 2","pages":"258 - 269"},"PeriodicalIF":0.9,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141609094","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
Analysis of Magnetotelluric Response Functions at the Cam Thuy Site, Northern Vietnam 越南北部 Cam Thuy 遗址的磁位响应函数分析
IF 0.9 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2024-07-11 DOI: 10.1134/S1069351324700332
S. S. Starzhinskii
{"title":"Analysis of Magnetotelluric Response Functions at the Cam Thuy Site, Northern Vietnam","authors":"S. S. Starzhinskii","doi":"10.1134/S1069351324700332","DOIUrl":"10.1134/S1069351324700332","url":null,"abstract":"<p><b>Abstract</b>—During the magnetotelluric studies in North Vietnam, simultaneous Phase Roll Out from Quadrant effect was detected in the behavior of impedance phases <i>Z</i><sub><i>xy</i></sub> and <i>Z</i><sub><i>yx</i></sub> at one of the sounding sites, CTH, in the Cam Thuy district, Thanh Hoa province. The investigation of this phenomenon has shown that it is accompanied by negative (directed upwards) components of the Umov–Poynting vector of electromagnetic energy flux in the entire range of the recorded periods of magnetotelluric variations. This energy flux direction remains unchanged when the initial coordinate system is rotated by angles of 45° and 60°. Another characteristic feature of this phenomenon is an unusual behavior of the apparent resistivity curves: the apparent resistivity magnitudes increase starting from a period of 200 s up to a period of 10<sup>4</sup> s, and this increase occurs practically along the asymptote. The analysis of the magnetotelluric field polarization and phase tensor asymmetry parameter (skew angle) β has shown that the section is characterized by significant three-dimensional (3D) distortions which manifest themselves by β values ranging between 20° and 90°.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"60 2","pages":"287 - 299"},"PeriodicalIF":0.9,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141609095","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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