Vladimir San'kov

Vladimir San'kov
  • PhD
  • Head of the laboratory at Institute of the Earth’s Crust, Russian Academy of Sciences

About

159
Publications
27,111
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3,164
Citations
Current institution
Institute of the Earth’s Crust, Russian Academy of Sciences
Current position
  • Head of the laboratory
Additional affiliations
September 2013 - present
Irkutsk State University
Position
  • Professor

Publications

Publications (159)
Article
Tectonophysical zoning of active faults of the Baikal rift system (BRS) was performed based on the degree of hazard caused by the generation of earthquakes of magnitude 7.0 and higher. The first basis for this procedure was the results of the natural stress state reconstruction, earlier performed from seismological indicators of rupture deformation...
Article
Based on the results of physical modeling of the processes of fault zone formation, general regularities of their structural and dynamic development were revealed. These regularities were used as the basis of the author’s tectonophysical model of the tectonic earthquake focus, with a precursor resulting from it. Such a precursor is the self-organiz...
Article
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Studies have been conducted on the variations of microseismic noise recorded by broadband and short-period seismic stations in the area of South Baikal before and after the large December 9, 2020 Kudara earthquake with M w = 5.6. Ten days before the earthquake, there was a gradual increase of oscillation amplitudes in the frequency range from 0.01...
Article
Studies have been conducted on the variations of ambient noise recorded by broadband and short-period seismic stations in the area of South Baikal before and after the large December 9, 2020 Kudara earthquake with Mw = 5.6. 10 days before the earthquake, there was a gradual increase of oscillation amplitudes in the frequency range from 0.01 to 0.1...
Article
The instrumental monitoring reveals an autowave nature of ice deformation behavior prior to ice shocks. A few minutes or the first tens of minutes before the shock, this process shows an increase in the amplitude of oscillations, often with a multi-fold reduction in their period. An autowave dynamics of ice deformations is due to self-organization...
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This study is focused on analog modeling of the stick-slip process along an existing large fault in an elastic-viscoplastic model subjected to loading at a constant strain rate. Based on our model results and data from (Ma et al., 2012, 2014), we distinguish stable, meta-stable, and meta-instable stages of the stick-slip process (the latter include...
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The origins and formation mechanisms of neotectonic structures in a part of the Mongolian-Siberian region were identified by geodynamic zoning based on multidimensional statistical analysis of numerical arrays describing geological-geophysical and geological-geomorphological processes. These processes in the regional lithosphere were described by a...
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The article deals with the first results of integrated geohazard monitoring conducted by the Institute of the Earth’s Crust SB RAS on the territory of Pribaikalye in 2020. The pilot network consists of three sites: "Buguldeika", "Priolkhonye" and "Listvyanka", each of which is equipped with high-precision digital devices including a broadband seism...
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—The crustal stress field of the Baikal Rift System has been reconstructed by tectonophysical inversion of focal mechanisms from the catalog of earthquakes recorded by the regional seismological network. Cataclastic analysis of fault slip data developed at the Shmidt Institute of the Physics of the Earth (Moscow) revealed previously unknown feature...
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The research provides an example of the GPS time series processing for monitoring of horizontal coseismic displacements during the 11 January 2021 M 6.7 Hovsgol earthquake, Mongolia. There has been developed a methodological approach to the study of coseismic displacements at the time of the earthquake. This paper presents the results of determinin...
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This paper proposes a method to observe the pre-earthquake features based on the variations in ambient noises using local moderate and strong seismic events as an example. Eight earthquakes in the Baikal rift system with energy classes K=10.1–15.9 were associated to a significant decrease in the level of ambient noises at epicentral distances from...
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The measurement data obtained at the GPS network in the southwestern part of the Baikal Rift System for the period from 1994 to 2020 were analyzed. The spatial relationship between seismic events and tectonic strain rates was estimated. The field of modern horizontal motions and deformations was calculated for the Tunka, South Baikal, and Khubsugul...
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––We present the preliminary results of a study of the Bystrinskoe earthquake, which occurred in the southern Baikal region on 21 September 2020 and was accompanied by shaking with an intensity of VI–VII on the MSK-64 scale in the epicentral area and with an intensity of V in large cities of southern East Siberia (Irkutsk, Angarsk, Usolye-Sibirskoe...
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This article gives a chronological review of the main published research results concerning the Cenozoic crustal stress-strain state in Mongolia and adjacent territories. The studies commenced in the southern Baikal rift zone in the 1970s and were extended further southwards to cover mobile regions neighbouring the Siberian platform. Geological, st...
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We again give thanks to A. Sorokin and A. Klyuchevskii and the Editorial Board of the Journal for the opportunity to discuss our results that have been published in the “Journal of Seismology” (Dobrynina, A.A., Sankov, V.A., Tcydypova, L.R., German, V.I., Chechelnitsky V.V., Ulzibat M. Hovsgol Earthquake 5 December 2014, Mw = 4.9: seismic and acous...
Article
During 1976–1987 in the former USSR on the territory of Irkutsk and Chita area (the Eastern Siberia) and Sakha Republic (Yakutia) ten peaceful nuclear explosions were conducted in scientific and commercial applications. The peaceful nuclear explosions have yields in the range of 3.2 to 15 kt. The events were registered by regional analog seismic st...
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Our detailed study of the crust and upper mantle of the South Baikal basin focused on seismic coda and seismic S‐waves attenuation and estimated seismic quality factor (QS and QC), frequency parameter (n), attenuation coefficient (δ), total attenuation (QT), and the ratio of two components the total attenuation: intrinsic attenuation (Qi), and atte...
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The article presents the results of the tectonophysical approach to the analysis of stress fields and the structure of gas–condensate deposits with the complex platform cover. The discussed case is the Kovykta license area (LA) in Eastern Siberia, Russia. In the upper part of the cross section, the network of fault zones was identified from the rel...
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The knowledge of the neotectonic structures inSoutheastern Mongolia, that is considerably distant from the active plate boundaries, is important for determining a source of tectonic deformation and regular features of activation in the intracontinental setting. Our research was focused on the East Gobi and South Gobi depressions located inSoutheast...
Chapter
The destruction of the lithosphere with the formation of fault zones is one of the leading geological processes determining the structure of the continents, both in the past and at the present stage. Seismicity providing information on the structure and dynamics of formation of large fault zones in real time reflects the modern fault formation in t...
Article
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A moderate shallow earthquake occurred on 5 December 2014 (MW = 4.9) in the north of Lake Hovsgol (northern Mongolia). The infrasonic signal with duration 140 s was recorded for this earthquake by the “Tory” infrasound array (Institute of Solar-Terrestrial Physics of the Siberian Branch of the Russian Academy of Science, Russia). Source parameters...
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The results of study of the Hovsgol earthquake with Mw = 4.9, which occurred on December 5, 2014, in the northern part of Hovsgol Lake in Mongolia, are presented. An infrasonic signal of ~140 s long was recorded by the Tory infrasonic station for the first time for the Baikal Rift System. On the basis of the source parameters and focal mechanism of...
Article
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В статье представлены материалы по разработке трехмерной интегрированной модели напряженно-деформированного состояния массивов пород в районе Стрельцовского урановорудного поля (СРП) в Юго-Восточном Забайкалье на основе данных о современных напряжениях (использованы методы геоструктурного и тектонофизического анализа) и сейсмотектонических деформац...
Article
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Information on designing a 3D integrated model of the deflected mode (DM) of rock massif near the Strel’tsovka uranium ore field (SUOF) in the southeastern Transbaikal region is presented in the paper. This information is based on the contemporary stresses estimated by geostructural and tectonophysical techniques and by studying the seismotectonic...
Article
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The seismic effective quality factor (QC) and its frequently dependences or the frequency parameter (n) and attenuation coefficient (δ) for the Earth’s crust and upper mantle of the North Tanzanian divergence zone (East African rift system) were estimated from an analysis of the earthquake coda waves recorded in the SEISMO-TANZ’07 French-Tanzanian...
Article
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Attenuation of seismic waves in the crust and the upper mantle has been studied in three global rift systems: the Baikal rift system (Eurasia), the North Tanzanian divergence zone (Africa) and the Basin and Range Province (North America). Using the records of direct and coda waves of regional earthquakes, the single scattering theory [Aki, Chouet,...
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We have studied the structural geology and geomorphology of the fault zones in the junction area of the Angara-Lena uplift and the Predbaikalsky trough. We have analyzed faults and folds and reconstructed paleostresses for this junction area named the Irkutsk amphitheatre. Our study shows that syn-fold (Middle Paleozoic) faults include thrusts, rev...
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a Институт геологии рудных месторождений, петрографии, минералогии и геохимии РАН 119017, Москва, Ж-17, Старомонетный пер., 35 b Институт физики Земли им. О.Ю. Шмидта РАН, 123242, Москва, Б. Грузинская ул., 10, стр. 1 c Институт земной коры Сибирского отделения РАН, 664033, Иркутск, ул. Лермонтова, 128 d Институт горного дела Дальневосточного отдел...
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a Институт геологии рудных месторождений, петрографии, минералогии и геохимии РАН 119017, Москва, Ж-17, Старомонетный пер., 35 b Институт физики Земли им. О.Ю. Шмидта РАН, 123242, Москва, Б. Грузинская ул., 10, стр. 1 c Институт земной коры Сибирского отделения РАН, 664033, Иркутск, ул. Лермонтова, 128 d Институт горного дела Дальневосточного отдел...
Article
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Potential triggering of mudflows by geodynamic and seismotectonic factors was assessed for the NE flank of the Baikal rift system, specifically for the junction area of the SW segment of the Chara depression, the Kodar ridge and the Muya-Chara inter-basin zone. The debris flow hazard in the study area is high due to geodynamic and seismotectonic ac...
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We analyze recent crustal movements, based on data of GPS measurements on the Amurian Plate and its margins. Most of the velocities were borrowed from scientific publications. Also, our new and updated data of periodic and permanent GPS observations are presented. A continuous field of strain rates has been constructed using the combined field of m...
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This paper presents SAR interferometric data obtained in the study of surface deformations of different origin within the Upper Angara-Muya interbasin link of the northeastern segment of the Baikal rift system, Russia. Differential SAR interferometry using images with small perpendicular baselines was applied in this geodynamical study. The potenti...
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The investigation data on seismic wave attenuation in the lithosphere and upper mantle of the northeastern flank of the Baikal rift system obtained with a seismic coda envelope and sliding window are considered. Eleven local districts were described by one-dimensional attenuation models characterized by alternation of high and low attenuation layer...
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2 Институт экологии и природопользования ДВО РАН, 675000, Благовещенск, ул. Б. Хмельницкова, 2, Россия 3 Институт природных ресурсов, экологии и криологии СО РАН, 672000, Чита, ул. Бутина, 26, Россия 4 Технический институт (филиал) Северо-Восточного федерального университета им. М.К. Амосова, 678960, Нерюнгри, ул. Южно-Якутская, 23, Россия 5 Инстит...
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1 Институт земной коры СО РАН, 664033, Иркутск, ул. Лермонтова, 128, Россия, aparf@crust.irk.ru 2 Иркутский научный центр СО РАН, 664033, Иркутск, ул. Лермонтова, 134, Россия, sankov@crust.irk.ru 3 Институт астрономии и геофизики МАН, 210351, Улан-Батор, Баянзүрх дүүрэг, Маахуур толгой, 5-р хороо, ШУА-ийн 7-р байр, Монголия, demberel@rcag.ac.mn АКТ...
Article
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Active faults of the Hangay-Hentiy tectonic saddle region in Central Mongolia are studied by space images interpretation, relief analysis, structural methods and tectonic stress reconstruction. The study results show that faults activation during the Late Cenozoic stage was selective, and a cluster pattern of active faults is typical for the study...
Article
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The spatial characteristics of seismotectonic deformations and the most likely fracture planes in the earthquake sources of the Baikal rift system (BRS) are determined using the method of cataclastic analysis of fractures [1]. It is shown that extension conditions with a strike of modern fractures parallel to the rift-controlling faults are dominan...
Article
A continuously operating GPS network, comprising seven permanent observation sites, is created to study the geodynamic processes in the Baikal region. Processing of the initial GPS data provides continuous atmospheric data in the form of total zenith tropospheric delay, which can be used for meteorological and climatological studies. The total dela...
Article
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The results of computer visualization of the spatiotemporal distribution of the total earthquake energy for the instrumental period are presented. This visualization was implemented to determine the parameters of slow earthquake migrations (of a few kilometers to a few hundreds of kilometers per year) in strike-slip zones. A case study of the San A...
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The contemporary horizontal movements and deformations in the central and southern parts of the Baikal depression are analyzed, and their relationship with contemporary seismicity is studied. Based on the long-term measurements by the Baikal geodynamical GPS monitoring network, the refined estimate is obtained for the velocity of the divergence of...
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We present results of seismological observation of Chelyabinsk meteoroid explosion on 15 February 2013. From recordings of the world and regional networks of broadband seismic stations, we estimated the energy of the surface Rayleigh wave generated by the meteoroid explosion, its propagation velocity and the frequency content. The analysis of azimu...
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В статье приведены результаты сейсмологических наблюдений при взрыве Челябинского метеороида 15 февраля 2013 г. По записям широкополосных сейсмических станций мировых и региональных сетей оценена энергия поверхностной волны Рэлея, возникшей в результате взрыва метеороида, скорость ее распространения и частотный состав. Выполнен анализ азимутальных...
Article
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Studies of recent geodynamics have been conducted by the Institute of the Earth’s Crust, SB RAS since 1998. Present-day crustal deformations are monitored at the geodynamic GPS polygon established by the Laboratory of Recent Geodynamics in the Mongol-Baikal region. Original methods and techniques using specialized equipment are applied to research...
Article
Based on multiyear measurements of present-day motions in the central area of the Baikal rift system, new data on the kinematics of horizontal motions, relative horizontal deformation rates, and rotation velocities in the area of junction of the South Baikal, North Baikal, and Barguzin rift basins have been obtained. This area is an intricate struc...
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GPS and paleoseismological studies of Holocene and recent slip rates in the zone of the Main Sayan Fault show that the fault is currently locked, and the accumulated stress may release in a large earthquake. The southeastern flank of the fault generated at least five large earthquakes for the past 10 kyr. For the time elapsed since the ultimate eve...
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This work addresses to relation of transpression and extension stress-strain conditions in intracontinental rift system. In our investigation we use a new structural, shallow geophysics, GPS geodetic data and paleostress reconstructions. The surroundings of southern tip of Siberian platform is the region of three Late Cenozoic structures conjugatio...
Article
The central part of the Baikal rift system is commonly explained as a zone of continental extension separating of Siberian block attributed to North Eurasian plate and Transbaikal block attributed to Amur plate. The major and secondary NNE and NE active faults were recognized as normal faults with insignificant strike-slip component. We propose the...
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We have analyzed ionospheric response to earthquakes with magnitudes of 4.1–8.8 which occurred under quiet geomagnetic conditions in different regions of the world (the Baikal region, Kuril Islands, Japan, Greece, Indonesia, China, New Zealand, Salvador, and Chile). This investigation relied on measurements of total electron content (TEC) variation...
Conference Paper
The troposphere zenith total delay (ZTD) determined from GPS measurements is an important parameter of the atmosphere. This delay is determined by a coefficient of the troposphere refraction [1]. In the report we consider data of the permanent ULAZ and IRKT GPS stations from 1999 up to nowadays. Utilizing the method of exact estimation of ZTD, the...
Article
The epicenter field of earthquakes that occur in the Baikal Rift System (BRS) was analyzed to identify certain areas that have stable concentrations of seismic events; these are reflections (in time) of deformable earthquake-generating volumes in the tectonosphere, or earthquake-generating structures. The patterns that are identifiable in the inter...
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The article deals with the Late Cenozoic fault tectonics and crustal stress state in the Mongolian block (Central and West Mongolia). An analysis was made of the stress field reconstructions, tectonic deformations in active fault zones of the central part of the block (Khangai dome), adjacent uplifts, and intermountain basins, i.e., Mongolian Altai...
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The article provides review of presentations of the All-Russia Conference with participation of invited foreign scientists «Contemporary Geodynamics of Central Asia and Hazardous Natural Processes: Quantitative Research Results» and the All-Russia Young Scientists Workshop on issues of contemporary geodynamics, which were held on 23–29 September 20...
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Comprehensive analysis of the parameters characterizing contemporary and neotectonic deformations of the Earth’s crust and upper mantle developed in the Mongolia-Siberia area is presented. The orientation of the axes of horizontal deformation in the geodetic network from the data of GPS geodesy is accepted as an indicator of current deformations at...
Conference Paper
Full-text available
DEFORMATIONS ON THE BOUNDARY BETWEEN THE EURASIAN AND AMURIAN PLATES S.V. Ashurkov, V.A. Sankov Institute of the Earth’s Crust SB RAS, Irkutsk, Russia Deformation style and intensity on the lithospheric plate boundaries are determined by the kinematics of plate motion. Direct geodetic measurements of horizontal plate motions make it possible to co...
Article
The seismic quality factor (Qc), the frequency parameter (n), and the attenuation coefficient (δ) of seismic waves in the lithosphere of the southwestern flank of the Baikal rift system are obtained from records of S coda waves from regional earthquakes. There is a strong dependence of the quality factor on the frequency and coda window length: for...
Article
Today, one of the most topical questions in the recent geodynamics of eastern Asia is that concerning the existence of the Amurian Plate and its boundaries. An unambiguous answer is difficult to obtain because seismicity is relatively rare and weak and the plate boundaries are often geomorphologically unclear. One of the methods that can help is sa...
Article
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The complex analysis of parameters characterizing the modern deformations of the Earth’s crust and upper mantle in the territory of the Mongolia-Siberian Area is made. Directions of principal tension axes of stress-tensors, calculated with the use of earthquake source mechanisms have been taken as parameters of modern deformations at the level of t...
Article
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The conventional radiocarbon ages of soil horizons limiting the timing of six fault-generating dis- placements within the East Sayan structure of the Main Sayan Fault and four displacements within the Tora structure of the Tunka Fault (M > 7) have been calibrated according to the IntCal04 calibration curve. It was revealed that between time periods...
Article
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We registered near-field global positioning system (GPS) total electron content (TEC) response to the Wenchuan Earthquake on 12 May 2008. The Wenchuan Earthquake (magnitude 8.0) occurred at 06:28 UT as the result of motion on a northeast striking reverse fault (thrust fault) on the northwestern margin of the Sichuan Basin. The earthquake reflects t...
Article
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Current deformation in Pribaikalia, Western and Central Mongolia, and Tuva has been studied from measured horizontal GPS velocities and respective computed strain and rotation rates using 1994–2007 data of the Baikal–Mongolian GPS triangulation network. The GPS velocity field shows two main trends: an NE trend within Jonggaria, the Mongolian Altay,...
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The paper addresses the Late Cenozoic fault tectonics and the stress state of the Earth’s crust within the Mongolian microplate, embracing Central and Western Mongolia. We analyze the results of reconstructing the stress fields and the tectonic deformations in the zones of active faulting, located at the uplands and in the intermountain trenches, w...
Article
We analyzed the degree of vertical coherention of the deformations on different levels of the earth crust and upper mantle in Mongolia-Siberia mobile area and surroundings using several strain indicators: - direction of the elongation axes of GPS derived horizontal strain field (Lukhnev et al., in press); - direction of SHmin of the present-day str...
Article
The faulting and Late Cenozoic crustal stress state on transition zone between Baikal rift system and strike-slip structures in North Mongolia are investigated. Submeridional Khubsugul, Darkhat and Busingol basins are characterized by normal fault setting at initial stage (Late Miocene - Pliocene) with NW-SE orientation of extension axis. The stres...
Article
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The seismic quality factor (QC) and the attenuation coefficient (delta) of the lithosphere in Baikal rift system (BRS) have been studied analyzing coda waves, using the single backscattering model. For this purpose from regional earthquake catalogue were selected 274 local events with magnitude M=3.1-5.4, occurred within 2001-2007. The QC values we...
Article
Coordinated investigations of geodynamic and ionospheric disturbances following the strong earthquake near the village Kultuk (the southern tip of Lake Baikal) were made by the Insti-tute of Solar-Terrestrial Physics, Institute of the Earth`s Crust, and Department of Physical Problems of the Buryat Scientific Center (Russian Academy of Sciences, Si...
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N.A. Florensov and N.A. Logatchev pioneered development of fundamental concepts of the structure and evolution of the Baikal system of rift basins. At the turn to the 21st century, in view of the wide availability of scientific research data on the Cenozoic continental rift zones located in Eurasia, Africa and North America, and taking into account...
Article
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Three-dimensional space-time diagrams of «logarithm of total energy released by earthquakes» parameter, lgEsum are constructed for regions with stable concentrations of earthquake epicenters in Cis-Baikal region for a period from 1964 to 2002. Based on analyses of such diagrams, areas of slow migration of seismic activity are defined. Estimated are...
Article
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We present new results on the long-term throw rates of active normal faults in the North Baikal Rift (NBR), eastern Siberia, based on a statistical analysis of triangular faceted scarps. Fault-bounded ridges in the NBR display typical morphologies with several contiguous facets separated by fault-perpendicular catchments. Over a range of 20 fault s...
Article
Apatite fission track analysis (AFTA) data are used to bring new light on the long-term and recent history of the Baikal rift region (Siberia). We describe the evolution of the topography along a NW-SE profile from the Siberian platform to the Barguzin range across the Baikal-southern Patom range and the northern termination of Lake Baikal. Our res...
Article
Current seismic hazard estimation for South Baikal basin (Baikal rift system, Siberia) using seismicity and GPS data
Article
The crustal quality factor in the southwest of Baikal rift system and surroundings
Article
A new map of the recent geodynamics of Asia is presented along with the principles and methods of its compilation and a characterization of the used factual material. For the first time, a map is based on the three parameters that determine recent geodynamics: the thickness of the lithosphere, the stress state, and the vectors of recent movements i...

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