Izvestiya, Physics of the Solid Earth最新文献

On Zonal Flows in the Earth’s Outer Core 地球外核的纬向流

IF 0.7 4区地球科学

Izvestiya, Physics of the Solid Earth Pub Date : 2026-07-17 DOI: 10.1134/S1069351326700436

S. L. Shalimov

引用次数: 0

Features of Secondary Microseism Generation by Ocean Waves 海浪产生次生微震的特征

IF 0.7 4区地球科学

Izvestiya, Physics of the Solid Earth Pub Date : 2026-07-17 DOI: 10.1134/S1069351326700357

A. S. Zapevalov

引用次数: 0

Characteristics of Volcanic Swarms During Intrusion Periods at Redoubt and Augustine Volcanoes 棱堡火山和奥古斯丁火山侵入期火山群特征

IF 0.7 4区地球科学

Izvestiya, Physics of the Solid Earth Pub Date : 2026-07-17 DOI: 10.1134/S1069351326700333

E. M. Grekov

{"title":"Characteristics of Volcanic Swarms During Intrusion Periods at Redoubt and Augustine Volcanoes","authors":"E. M. Grekov","doi":"10.1134/S1069351326700333","DOIUrl":"10.1134/S1069351326700333","url":null,"abstract":"The article analyzes volcanic swarms during periods of magma intrusion at Redoubt and Augustine volcanoes from the perspective of seismic regime. It is shown that the two volcanic swarms observed prior to the 2009 eruption of Redoubt Volcano differ in both their temporal energy release patterns and their frequency-magnitude distribution (b-value). Furthermore, the second swarm, occurring immediately before the eruption, features a more prominent strongest event, with the majority of other strong events clustering within a few hours prior to it (considering the swarm’s total duration of approximately three days). Abruptly following the strongest event, the seismic energy release drops sharply, which deviates from the classical pattern of swarm activity. The number of events and their maximum magnitudes showed a gradual increase from the swarm’s onset toward the strongest event. Furthermore, a decrease in the b-value was observed prior to the strongest event, compared to the elevated values recorded at the beginning of the swarm. These patterns are also identified during the intrusion period preceding the 2006 eruption of Augustine Volcano, though over a longer temporal scale. Such behavior is successfully explained within the framework of rock failure and magma intrusion models.","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"62 3","pages":"452 - 468"},"PeriodicalIF":0.7,"publicationDate":"2026-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148458777","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

Stability of Seismicity Parameter Estimates: RTL and Gutenberg–Richter b-Value 地震活动性参数估计的稳定性：RTL和Gutenberg-Richter b值

IF 0.7 4区地球科学

Izvestiya, Physics of the Solid Earth Pub Date : 2026-07-17 DOI: 10.1134/S1069351326700497

A. A. Petrushov, V. B. Smirnov

{"title":"Stability of Seismicity Parameter Estimates: RTL and Gutenberg–Richter b-Value","authors":"A. A. Petrushov, V. B. Smirnov","doi":"10.1134/S1069351326700497","DOIUrl":"10.1134/S1069351326700497","url":null,"abstract":"We present the results of examining the variability in the estimates of the complex parameter of seismicity RTL and the b-value of the Gutenberg–Richter frequency–magnitude relationship. Both parameters are frequently used in practical applications such as anomaly detection and earthquake forecasting. The calculation of these parameters involves a number of adjustable algorithm settings and alternative statistical estimation methods. The choice of a specific settings can be crucial to the calculation results, potentially reflecting algorithmic artifacts. In this paper, we explore the stability of these seismicity parameters with respect to the tuning coefficients in corresponding algorithms, using earthquake catalogs from Northern California and Kamchatka. Our results show that the empirical coefficients of the RTL algorithm have a characteristic effect on the calculation results: beyond certain threshold coefficient values, the variability of the results becomes negligible. A similar effect is observed when varying the spatial window for both the RTL and b-value calculations. We estimate the scatter of the results calculated under varying algorithm settings and analyze how this scatter varies across several distinct spatiotemporal regions within seismically active regions.","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"62 3","pages":"614 - 624"},"PeriodicalIF":0.7,"publicationDate":"2026-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148458995","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

Results of Electromagnetic Soundings in Frequency and Time Domain at the Carbon Test Site “Seven Larches” (Yamalo-Nenets Autonomous Okrug) 亚马尔-涅涅茨自治区“七落叶松”碳测试点频域和时域电磁测深结果

IF 0.7 4区地球科学

Izvestiya, Physics of the Solid Earth Pub Date : 2026-07-17 DOI: 10.1134/S1069351326700321

N. Yu. Bobrov, A. A. Shlykov, A. K. Saraev, D. M. Bogatova

{"title":"Results of Electromagnetic Soundings in Frequency and Time Domain at the Carbon Test Site “Seven Larches” (Yamalo-Nenets Autonomous Okrug)","authors":"N. Yu. Bobrov, A. A. Shlykov, A. K. Saraev, D. M. Bogatova","doi":"10.1134/S1069351326700321","DOIUrl":"10.1134/S1069351326700321","url":null,"abstract":"The article presents the results of electromagnetic soundings performed at the carbon test site Seven Larches in the Yamalo-Nenets Autonomous Okrug. The surveys were carried out using the controlled source radiomagnetotelluric (CSRMT) and the transient electromagnetic (TEM) methods. The CSRMT surveys were performed in scalar mode within the 0.5–1000 kHz frequency range, measuring signals at three fundamental frequencies (0.5, 5, and 50 kHz) and their odd subharmonics. TEM measurements were conducted using a 50 × 50 m single-loop setup. The TEM curves showed transient processes with a double sign reversal of the signal, indicating the influence of frequency dispersion of resistivity. Joint interpretation of the CSRMT and TEM data allowed us to estimate the frequency dispersion parameters and take it into account during TEM data inversion. Numerical modeling showed that the effect of frequency dispersion on the CSRMT sounding results was insignificant under the given conditions. Some influence of static shifts on the CSRMT curves was corrected by spatial data filtering. Based on the electromagnetic sounding results, resistivity sections along two profiles were obtained. The sounding data are consistent with available geological and cryological information for the study area. The structure of the section can generally be characterized as horizontally layered. The upper part of the section, down to a depth of 20 m, is heterogeneous in electrical properties, according to CSRMT data. The resulting resistivity section correlates reasonably well with drilling results, which indicate that sedimentary deposits are partially frozen and partially thawed. According to CSRMT data, the top of a high-resistivity layer was identified at a depth interval of 60–80 m, and the TEM data revealed the base of this layer at a depth of approximately 200 m. The layer possibly represents a relict Pleistocene permafrost formation.","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"62 3","pages":"499 - 512"},"PeriodicalIF":0.7,"publicationDate":"2026-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148459061","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

Geomagnetic and Ionospheric Responses Following the July 29, 2025 Kamchatka Megathrust Earthquake 2025年7月29日堪察加大逆冲地震后的地磁和电离层响应

IF 0.7 4区地球科学

Izvestiya, Physics of the Solid Earth Pub Date : 2026-07-17 DOI: 10.1134/S1069351326700400

S. A. Riabova, S. L. Shalimov

引用次数: 0

Identification and Analysis of Multiscale Displacement Fields by SAR Interferometry Methods: Case Study of the Crimean Peninsula 基于SAR干涉测量方法的多尺度位移场识别与分析——以克里米亚半岛为例

IF 0.7 4区地球科学

Izvestiya, Physics of the Solid Earth Pub Date : 2026-07-17 DOI: 10.1134/S1069351326700382

R. S. Osmanov, M. S. Volkova, V. O. Mikhailov

{"title":"Identification and Analysis of Multiscale Displacement Fields by SAR Interferometry Methods: Case Study of the Crimean Peninsula","authors":"R. S. Osmanov, M. S. Volkova, V. O. Mikhailov","doi":"10.1134/S1069351326700382","DOIUrl":"10.1134/S1069351326700382","url":null,"abstract":"This paper presents the results of displacement monitoring over a vast area of the Crimean Peninsula for the period from 2020 to 2024, based on images from satellites equipped with a synthetic aperture radar (SAR). The displacement fields were analyzed and interpreted at both regional and local scales. It was found that 99% (3σ) of the average surface displacement velocities range from –23 to 23 mm/yr. A block structure consistent with the locations of several active tectonic faults is observed in the regional component of the field of average displacement velocities. The dynamics of the regional negative and positive displacements derived from InSAR data are consistent with the subsidence of the Sivash Basin and the uplift of the Kerch Upland, a trend known from tectonic schemes. The causes of local natural or anthropogenic processes revealed in individual areas are discussed. At the local scale, the algorithm for detecting anomalous deformation zones proposed in the paper identified 61 sites with sizes ranging from 0.1 to 2.3 km2. Among these, areas affected by landslide processes are of particular importance. The dynamics of individual landslide masses is studied. The results demonstrate the high effectiveness of radar interferometry for solving a wide range of fundamental and practical problems, including those related to environmental issues and public safety.","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"62 3","pages":"469 - 480"},"PeriodicalIF":0.7,"publicationDate":"2026-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148458773","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

Approximate Analytical Solution to the Direct Microseismic Sounding Problem 直接微地震测深问题的近似解析解

IF 0.7 4区地球科学

Izvestiya, Physics of the Solid Earth Pub Date : 2026-07-17 DOI: 10.1134/S1069351326700345

R. A. Zhostkov, D. A. Zharkov

引用次数: 0

Features of Earthquakes in Karelia Based on Seismic Data for the Period 2000–2024 基于2000-2024年地震资料的卡累利阿地震特征

IF 0.7 4区地球科学

Izvestiya, Physics of the Solid Earth Pub Date : 2026-07-17 DOI: 10.1134/S1069351326700473

I. A. Zueva, M. D. Lukina, G. N. Rodionov

{"title":"Features of Earthquakes in Karelia Based on Seismic Data for the Period 2000–2024","authors":"I. A. Zueva, M. D. Lukina, G. N. Rodionov","doi":"10.1134/S1069351326700473","DOIUrl":"10.1134/S1069351326700473","url":null,"abstract":"The natural seismicity of the Republic of Karelia is studied for the period from 2000 to 2024. The presented results are confirmed by data from the Karelian seismic network and seismic stations in neighboring regions. The geological structure of the study area, characteristics of seismic equipment, programs and data processing methods are briefly described. The presence of a seismic network in the region makes it possibble to calculate the main parameters of events and determine their characteristic features. During the specified period, 80 earthquakes with magnitudes from 0.5 to 3.2 were detected, and the data were included in the consolidated seismic catalog of Karelia. Even weak tectonic earthquakes on platforms pose a risk to residential and industrial facilities. Earthquakes mainly occur in the crust at a depth of up to 20 km. The maximum recorded depth of events for the period under consideration is 34 km. The analysis of waveforms and amplitude spectra of local earthquakes was carried out. Seismic events of natural origin are recorded at frequencies in the range from 2 to 18 Hz. The period from 2000 to 2024 is characterized by weak earthquakes occurring in the northern part of the Karelian craton and Belomorian mobile belt. The number of instrumentally recorded earthquakes decreases from west to east, with their epicenters located along the main faults and on the lines of the latest ruptures. The obtained results confirm the existence of previously identified zones of local seismic deformations in Karelia—the Belomorian, Paanajarvi and Kalevalsky seismogenic structures.","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"62 3","pages":"589 - 602"},"PeriodicalIF":0.7,"publicationDate":"2026-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148458994","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

Paleomagnetic Results from the Neoproterozoic Postglacial Sequence of Southern Siberia (Kumakh-Ulakh Formation) 南西伯利亚（Kumakh-Ulakh组）新元古代冰期后层序的古地磁结果

IF 0.7 4区地球科学

Izvestiya, Physics of the Solid Earth Pub Date : 2026-07-17 DOI: 10.1134/S1069351326700448

A. V. Shatsillo, I. V. Latysheva, D. V. Rud’ko, I. V. Fedyukin

{"title":"Paleomagnetic Results from the Neoproterozoic Postglacial Sequence of Southern Siberia (Kumakh-Ulakh Formation)","authors":"A. V. Shatsillo, I. V. Latysheva, D. V. Rud’ko, I. V. Fedyukin","doi":"10.1134/S1069351326700448","DOIUrl":"10.1134/S1069351326700448","url":null,"abstract":"Paleomagnetic studies were performed on red-colored siltstones from the lower part of the Early Ediacaran Kumakh-Ulakh Formation (western slope of the Aldan Shield, southern Siberian Platform), representing a postglacial sequence associated with the Marinoan glaciation (645–635 Ma). Under the Geocentric Axial Dipole (GAD) model, the obtained results indicate a near-equatorial position of the Siberian Platform during the deposition of the Kumakh-Ulakh Formation, which supports the Snowball Earth hypothesis. On the other hand, the distribution pattern of the Kumakh-Ulakh Formation virtual geomagnetic poles may indicate the contribution of an equatorial-dipole component to the Early Ediacaran geomagnetic field, thus deviating from the actualistic GAD model. In this case, the result cannot be used to support the Snowball Earth hypothesis. Regardless of the geomagnetic field configuration during the time period under consideration, the obtained paleomagnetic data suggest that the post-Marinoan deglaciation processes were not associated with a significant change in the latitudinal position of the Siberian Platform. This conclusion, however, is based on the assumption of a constant contribution of the axial and equatorial dipole components to the main geomagnetic field during the Late Cryogenian and Early Ediacaran.","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"62 3","pages":"487 - 498"},"PeriodicalIF":0.7,"publicationDate":"2026-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148458996","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