Izvestiya, Physics of the Solid Earth最新文献_第7页

Application Examples and Capabilities of Combining Passive Seismic Methods to Study Depth Structure of the Earth’s Crust 结合被动地震方法研究地壳深度结构的应用实例和能力

IF 0.9 4区地球科学

Izvestiya, Physics of the Solid Earth Pub Date : 2024-09-30 DOI: 10.1134/S1069351324700721

G. N. Antonovskaya, K. B. Danilov, I. M. Basakina, N. Yu. Afonin, N. K. Kapustian

{"title":"Application Examples and Capabilities of Combining Passive Seismic Methods to Study Depth Structure of the Earth’s Crust","authors":"G. N. Antonovskaya, K. B. Danilov, I. M. Basakina, N. Yu. Afonin, N. K. Kapustian","doi":"10.1134/S1069351324700721","DOIUrl":"10.1134/S1069351324700721","url":null,"abstract":"Abstract—The capabilities of a combination of passive seismic methods to study the geological structure of the upper part of the Earth’s crust compared to active methods are analyzed using case examples. The passive methods include microseismic sounding, Nakamura’s horizontal-to-vertical spectral ratio method (HVSR), seismic interferometry, and, for anthropogenic sites, ambient vibration testing using industrial signals. Three examples are considered: a zone of a platform tectonic earthquake, a kimberlite pipe, and a hydroelectric dam with foundation site. The results of the passive and active seismic methods agree well. Passive methods give more diffuse horizontal boundaries but clearly identify near-vertical heterogeneities. Combining passive methods is effective for reconnaissance studies and in the remote regions that are difficult to access by active observation techniques. Combination of passive methods enables simultaneous processing of seismic records obtained through different passive methods, with a minimum of two sensors required.","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"60 4","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142415170","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

On the Spectrum of Ultralow-Frequency Oscillations of the Ionosphere in the Pc1 Range 论电离层 Pc1 范围内的超低频振荡频谱

IF 0.9 4区地球科学

Izvestiya, Physics of the Solid Earth Pub Date : 2024-09-30 DOI: 10.1134/S1069351324700708

A. V. Guglielmi, B. I. Klain, A. S. Potapov

{"title":"On the Spectrum of Ultralow-Frequency Oscillations of the Ionosphere in the Pc1 Range","authors":"A. V. Guglielmi, B. I. Klain, A. S. Potapov","doi":"10.1134/S1069351324700708","DOIUrl":"10.1134/S1069351324700708","url":null,"abstract":"Abstract—The concept of Alfvén waves plays a key role in the theory of ultralow-frequency (ULF) electromagnetic oscillations of extraterrestrial origin. This article is dedicated to the 80th anniversary of the discovery of Alfvén waves. It focuses on the ionospheric Alfvén resonator (IAR). IAR excites ultralow-frequency oscillations in the Pc1 range (0.2–5 Hz). When computing the oscillation spectrum within the standard model, it is assumed that the IAR is an autonomous dynamical system. In contrast, in this paper, IAR is treated as a specific subsystem of the general system of Alfvén oscillations of geomagnetic field lines. In other words, we proceed from the idea that IAR, in general, is not an autonomous oscillatory system. The problem about IAR spectrum is discussed in the context of the general problem on the spectrum of magnetohydrodynamic oscillations of the Earth’s magnetosphere. The corresponding Sturm–Liouville problem is formulated. Analytical solutions of the problem are considered in the Wentzel–Kramers–Brillouin approximation. It is pointed out that the problem of IAR spectrum has to be solved by numerical methods due to the rather complicated distribution of the Alfvén velocity along the geomagnetic field lines.","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"60 4","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142415294","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

Characteristic Depth Distribution of Crustal Earthquakes in Southern Siberia 南西伯利亚地壳地震的深度分布特征

IF 0.9 4区地球科学

Izvestiya, Physics of the Solid Earth Pub Date : 2024-09-30 DOI: 10.1134/S1069351324700599

P. A. Malyutin, A. A. Skorkina, I. A. Vorobieva, S. V. Baranov, S. D. Matochkina, A. P. Molokova, P. N. Shebalin

引用次数: 0

Magnetostratigraphy of the Permian–Triassic Boundary in the Lower Reaches of the Vetluga River, Nizhny Novgorod Region, East European Platform 东欧地台下诺夫哥罗德地区韦特卢加河下游二叠纪-三叠纪界线的磁地层学

IF 0.9 4区地球科学

Izvestiya, Physics of the Solid Earth Pub Date : 2024-07-18 DOI: 10.1134/S1069351324700460

A. M. Fetisova, R. V. Veselovskiy, V. K. Golubev, M. P. Arefiev

引用次数: 0

Model of Surface Subsidence of Pyroclastic Flow: the August 29, 2019 Shiveluch Volcano Eruption, Kamchatka 火成碎屑流地表下沉模型：2019 年 8 月 29 日堪察加希维鲁奇火山喷发

IF 0.9 4区地球科学

Izvestiya, Physics of the Solid Earth Pub Date : 2024-07-18 DOI: 10.1134/S1069351324700472

M. S. Volkova, V. O. Mikhailov

{"title":"Model of Surface Subsidence of Pyroclastic Flow: the August 29, 2019 Shiveluch Volcano Eruption, Kamchatka","authors":"M. S. Volkova, V. O. Mikhailov","doi":"10.1134/S1069351324700472","DOIUrl":"10.1134/S1069351324700472","url":null,"abstract":"Abstract—Possible causes of surface subsidence of the pyroclastic flow formed on the slopes of the Shiveluch volcano, Kamchatka, during the eruption on August 29, 2019 are studied. A series of InSAR (Interferometric Synthetic Aperture Radar) images from acquisitions by the European Space Agency Sentinel-1A satellite for a period from May to October in 2020 and 2021 are used to construct maps of the displacement rates of the volcano surface. An area with large subsidence coinciding with the area of pyroclastic flow is revealed on the volcano’s southeastern slope. The maximum subsidence rates are found to be 385 mm/year in 2020 and 257 mm/year in 2021. The thickness of the pyroclastic deposits is estimated from radar images for 2020. The dependence of the subsidence rate on flow thickness has a significant scatter with a rather high correlation coefficient (‒0.69). A thermomechanical model has been constructed, which takes into account compaction of the deposited material due to changes in porosity and density over time. According to the model, to explain the dependence of the subsidence rate of the flow surface on the thickness of rocks, it is sufficient to assume that in addition to surface subsidence, flow cooling was accompanied by a small change in porosity occurred, which, depending on the initial flow temperature, made up to 1.5 to 1.7% for the period from 2019 to 2021. The scatter in the relationship “subsidence rate versus flow thickness” is explained for by the erosion of pyroclastic deposits.","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"60 3","pages":"459 - 465"},"PeriodicalIF":0.9,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141743220","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

Microseisms of Lake Baikal Based on Regional Seismic Network Data 基于区域地震网络数据的贝加尔湖微地震

IF 0.9 4区地球科学

Izvestiya, Physics of the Solid Earth Pub Date : 2024-07-18 DOI: 10.1134/S106935132470040X

A. N. Besedina, Ts. A. Tubanov, P. A. Predein, D. P.-D. Sanzhieva, G. N. Ivanchenko

{"title":"Microseisms of Lake Baikal Based on Regional Seismic Network Data","authors":"A. N. Besedina, Ts. A. Tubanov, P. A. Predein, D. P.-D. Sanzhieva, G. N. Ivanchenko","doi":"10.1134/S106935132470040X","DOIUrl":"10.1134/S106935132470040X","url":null,"abstract":"Abstract—Peculiarities of microseismic ambient noise are studied based on the data from the stations of regional seismic network located in the central part of the Baikal rift. The probabilistic approach is used to thoroughly investigate the pattern of diurnal variations in microseisms and to analyze the amplitude level and frequency content of the spatial anomalies and the temporal changes (seasonal and annual). Based on the 2020–2021 data, a regional probabilistic model of the microseismic noise is built in a wide range of periods. The study of microseisms in the frequency band of about 1 Hz revealed a seasonal anomaly against the level of the global minimum in the microseismic noise power spectrum. The anomaly is observed from May to December at seismic stations surrounding Lake Baikal except for its northern part. The back azimuth direction in the frequency range of about 1 Hz indicates the arrivals from the location of the lake, suggesting that these signals can be identified as lake-generated microseisms. The high values of the coherence function testify to a linear relation between the wind velocity and the occurrence of lake microseisms. The detailed analysis of the spectral and polarization parameters of the seismic ambient noise revealed two types of lake-generated microseisms with frequencies of 0.4–0.7 and 0.7–1.5 Hz. The first frequency interval is likely to correspond to the single-frequency lake-generated microseisms, while the second interval covers the frequency ranges of the dual-frequency microseisms.","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"60 3","pages":"355 - 373"},"PeriodicalIF":0.9,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141743228","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

Late Paleozoic Remagnetization on the Western Slope of the Southern Urals: Age and Geotectonic Implications 南乌拉尔山脉西坡的晚古生代地磁化：年龄和大地构造影响

IF 0.9 4区地球科学

Izvestiya, Physics of the Solid Earth Pub Date : 2024-07-18 DOI: 10.1134/S1069351324700393

M. B. Anosova, A. V. Latyshev

{"title":"Late Paleozoic Remagnetization on the Western Slope of the Southern Urals: Age and Geotectonic Implications","authors":"M. B. Anosova, A. V. Latyshev","doi":"10.1134/S1069351324700393","DOIUrl":"10.1134/S1069351324700393","url":null,"abstract":"Abstract—In the paper, we present the results of paleomagnetic studies on numerous intrusive bodies of the Bashkirian megazone, a major tectonic zone of the Southern Urals. More than 70 intrusions in various parts of the Bashkirian megazone (in the northern, central, and southern part of the structure) were sampled. The studied intrusions have Riphean age. However, as a significant part of the rocks of the Southern Urals, these intrusive bodies were remagnetized during the Late Paleozoic collision within the Urals fold belt. Here, we discuss the secondary Late Paleozoic component of natural remanent magnetization. According to the obtained paleomagnetic data, the secondary Late Paleozoic component in most of the Bashkirian megazone is post-folding, i.e., formed after the completion of the main phase of fold deformations in the Southern Urals. A comparison of paleomagnetic directions obtained from intrusions in different parts of the Bashkirian megazone showed that there were no significant movements of individual parts of the Bashkirian megazone relative to each other after the formation of the Late Paleozoic component. The Late Paleozoic remanence component yielded a paleomagnetic pole of Plong = 171.6°, Plat = 39.9°, α95 = 5.9°, and N = 6 from six regions (38 sites) in the Bashkirian megazone. The obtained pole is statistically indistinguishable from the mean of 15 poles for Stable Europe with ages of 280–301 Ma. Thus, the secondary Late Paleozoic component in the Bashkirian megazone formed approximately 280–301 million years ago, after which the Bashkirian megazone did not experience any relative motions with respect to the East European craton.","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"60 3","pages":"396 - 423"},"PeriodicalIF":0.9,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141743214","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

The Effect of Heavy Inclusions in the Upper Crust on Thermoconvective Instability of the Lithosphere 上地壳重包裹体对岩石圈热凸不稳定性的影响

IF 0.9 4区地球科学

Izvestiya, Physics of the Solid Earth Pub Date : 2024-07-18 DOI: 10.1134/S1069351324700411

B. I. Birger

引用次数: 0

On Constructing of Magnetic and Gravity Images of Mercury from Satellite Data 根据卫星数据构建水星的磁力和重力图像

IF 0.9 4区地球科学

Izvestiya, Physics of the Solid Earth Pub Date : 2024-07-18 DOI: 10.1134/S1069351324700459

I. E. Stepanova, A. G. Yagola, D. V. Lukyanenko, I. I. Kolotov

引用次数: 0

Prediction Results for the Strongest Earthquakes of February 6, 2023 in Southern Turkey 2023 年 2 月 6 日土耳其南部最强烈地震的预测结果