Fig 6 - uploaded by Elena A Levina
Content may be subject to copyright.
Diagrams showing seismic activity propagation from the interplate boundaries towards the Baikal rift zone from 1963 to 2015, M?4.5 (? ? from the collision region; ? ? from the Japanese segment of the Benioff zone). Projected migration lines from/to the equator are shown by amber and green lines, respectively. The Baikal rift zone is located to the right of the vertical blue lines.
Source publication
The paper briefly overviews the evolution of ideas concerning causes and mechanisms related to the origin of the Baikal rift zone (BRZ) in the centre of the Eurasian plate, discusses parameters of the recent seismogeodynamic impact on the seismotectonic regime in BRZ due to the Western Pacific subduction and the Indo-Eurasian collision, and attempt...
Similar publications
Abstract: The paper briefly overviews the evolution of ideas concerning causes and mechanisms related to the origin
of the Baikal rift zone (BRZ) in the centre of the Eurasian plate, discusses parameters of the recent seismogeodynamic
impact on the seismotectonic regime in BRZ due to the Western Pacific subduction and the Indo-Eurasian collision,
a...
Citations
... The current state of research in this direction is described in the paper by (Bykov, 2018). Currently, there are various models of stress and deformation propagation in the lithosphere and its individual tectonically active zones (subduction zones, collision zones, transform faults, and fault-block intraplate regions) (Anderson, 1975;Bott and Dean, 1973;Melosh, 1976;Rice, 1980;Birger, 1989;Nikolaevskii, 1995;1996;Kuzmin, 2012;2020;Kocharyan et al., 2014;Bykov, 2015;Ruzhich et al., 2016). ...
... In summary, the seismological studies [20] [24] [32] [33] [34] [35], and the mathematical [10] and physical [11] [45] modeling results have demonstrated the impact of the India-Eurasia collision and the Pacific subduction on the geodynamics of the Asian continent. ...
... In the Pamir-Baikal Belt of about 5500-km length, the epicenters of earthquakes (M ≥ 7.9) migrated southwest-northeast at a velocity of about 110 km/yr from 1907 to 1957 [33]. The migration trends for the seismicity maxima (М ≥ 5) revealed in the same belt along the Tian Shan-Baikal Rift Zone profile during 1950-2009 have been interpreted as the strain fronts moving southwest-northeast and in the opposite direction at a velocity of 90 km/yr [20]. The epicenter migration exhibited the discrete-translational (impulse) pattern, which was due to quasiperiodic generation of the strain fronts in the India-Eurasia collision zone and was in agreement with earlier results [48]. ...
The interaction between of the India–Eurasia collision and the Western Pacific subduction and their contribution to recent geodynamics of the Asian continent are discussed. We perform a comparative analysis of the data available from world literature and new data on slow strain and earthquake migration from the India–Eurasia collision and the Western Pacific subduction zones. Based on the concepts of wave dynamics of the deformation processes, a localization scheme is constructed illustrating the migration of slow strain fronts in central and eastern Asia, and the wave geodynamic impact of collision and subduction on the Asian continent is shown.
... The second type of migration of earthquakes is called differently, ''across-the-seismic-suture migration'' (Vil'kovich & Shnirman, 1982), ''transverse migration'' (Baranov et al., 1989;Zhao & Yao, 1995) or ''across-the-seismic-focal-zone migration'' (Vikulin, 1992). The seismic migration processes and their peculiar features displayed in different geodynamic settings of central and eastern Asia have thus far been studied (Baranov et al., 1989;Bykov & Merkulova, 2020;Hirose et al., 2019;Liu et al., 2011;Mino, 1988;Novopashina & Lukhneva, 2020;Novopashina & San'kov, 2018;Ruzhich et al., 2016;Sherman, 2013;Stepashko & Merkulova, 2017;Trofimenko et al., 2017;Zhao & Yao, 1995, and specific earthquake migration parameters, such as velocities, recurrence periods, and the energy released have been determined in the most tectonically active Western Pacific margin (Kuznetsov & Keilis-Borok, 1997;Vikulin, 1992;Vikulin et al., 2009;Ž alohar, 2018). Relying on the analysis of the World Stress Map (WSM) database, the dynamics of the stress state features of the geological medium displayed during large earthquake preparation in the Japanese island arc area have been revealed (Ž alohar et al., 2020). ...
... The large M C 5 earthquake migration, its cyclic pattern and the possible causes of its direction have been examined most extensively in mainland Asia, precisely in the Baikal area (Novopashina & Lukhneva, 2020;Ruzhich et al., 2016;Sherman, 2013), Priamurye and Primorye regions (Stepashko, 2010(Stepashko, , 2011a(Stepashko, , 2011b, northern and northeastern China, and the Korean Peninsula (Stepashko, 2011a;Zhao & Yao, 1997). However, strain transfer in the form of earthquake migration from the Western Pacific subduction zone toward the Asian continent has not been thus far sufficiently explored. ...
... This especially concerns the earthquake migration from trenches which are different in their extent, the density of the seismic energy released, and the power of the sources that generate earthquakes. The publications touching upon this most important issue are quite few in number (Baranov et al., 1989;Mino, 1988;Ruzhich et al., 2016;Vikulin, 1992;Zhao & Yao, 1995). The principal goals of the paper are as follows: (I) to give an overview and analyze the data on migration of slow strain and earthquakes from the Nankai, Japan and Kuril-Kamchatka segments of the Western Pacific subduction zone deep into mainland Asia; (II) to calculate the velocity of migration of recent M C 6.5 earthquakes from the Japan and Kuril-Kamchatka trenches toward the Asian continent. ...
In this paper, we explore the Western Pacific subduction impact on the geodynamics of the Asian continent. The data on migration of slow strain and earthquakes from the Nankai, Japan and Kuril-Kamchatka segments of the Western Pacific subduction zone deep into mainland Asia are analyzed. The calculations performed on five profiles, crossing the Kuril Islands, the Japanese Archipelago and Sakhalin Island toward the Asian continent, have revealed the transverse migration of earthquakes from the Japan–Kuril-Kamchatka subduction zone. The velocities of hypocenter migration of M ≥ 4.5 earthquakes from the Kuril-Kamchatka Trench via northern and central Sakhalin vary from 6 to 17 km/year, on average, at different depths. The profiles crossing the islands of Hokkaido and Sakhalin show the M ≥ 4.earthquake migration from the Kuril and Japan trenches at velocities of 8–27 km/year.
... The velocity of migration depends on the stress transfer mechanism. The BRS is characterized by a wide scatter of different-scale migration velocities: from several kilometers to several hundred kilometers per year [Gorbunova and Sherman, 2012;Sherman, 2013Sherman, , 2014Bornyakov et al., 2014;Levina and Ruzhich, 2015;Ruzhich et al., 2016;Kakourova and Klyuchevskii, 2017;Bykov, 2018;Klyuchevskii and Kakourova, 2018;Novopashina and San'kov, 2015;Novopashina and Sankov, 2018]. ...
The recent tectonic stress field in the northeastern Baikal rift system (BRS) corresponds to the crustal deformation field. The stress-strain state of the Earth’s crust determines the fault network geometry and spatiotemporal structure of the epicentral field characterized by many earthquake swarms and earthquake migrations in the study area. In order to study the seismic process dynamics in different directions of the crustal deformation, the spatiotemporal analysis of earthquake time series has been made over the 1964–2015 instrumental period. To determine the relationship between crustal stress and spatiotemporal features of the epicentral field the seismic data were projected along horizontal stress tensor axes σ3 and σ2, consistent with major directions of the crustal deformation, a strike of major rifting structures, and a general azimuth of active fault groups. The NE-SW direction along the intermediate horizontal stress axes and main faulted arears exhibits slow earthquake migrations up to 60 km long, propagating with a modal velocity of about 30 kilometers per year. The NW-SE direction along the principal horizontal stress axes, orthogonal to the main faulted areas, is characterized by shorter migration sequences of less duration, propagating with a higher velocity than sequences registered in the NE-SW. The difference between the migration dynamics in mutually orthogonal directions can be attributed to the fault network configuration and the differences in the deformation process.
... Due to subduction beneath the continent, the Pacific plate exerts a significant geodynamic impact on the Eurasian plate, albeit not making contact with the latter. The Amurian plate is moving from west to east owing to the impact of the zone of collision between the Indian and Eurasian plates [21,38], and the reciprocal compression associated with the Pacific plate subduction [34]. ...
... Zones of concentrated deformation, such as the subduction, collision, active rifting and transform fault zones, appear to be the interaction zones of the geoblocks, and lithospheric plates, and intense sources of slow strain waves [10]. The wave processes are assumed to be one of the main factors that cause the transformations and the formation of various-scale tectonic structures, as has been shown when clarifying the mechanism of rifting in the Baikal Rift Zone (BRZ) [7,34]. ...
... A relationship between the seismic regime of the BRZ and large-scale seismic activation in the collision and subduction zones has been revealed. It follows from the data that the passage of the deformation front from the side of the Indo-Eurasian collision zone has a more considerable impact on the seismic regime of the BRZ than slow strain wave fronts that propagate from the Pacific subduction zone [34]. The earthquake migration velocities and directions, which reflect the passage of the deformation front, are strongly influenced by the compression ratio in the collision and subduction zones. ...
An analysis of data on the migration of earthquakes and slow deformations from the Indo–Eurasian collision and the Western Pacific subduction zones is given and the wave “geodynamic impact” of these tectonic processes on the Amurian plate and adjoining structures is demonstrated. The interaction of collision and subduction, and their relative contribution to the recent geodynamics of the Amurian plate are discussed. A scheme illustrating localization of slow strain wave manifestations in central and eastern Asia has
been constructed. Calculations were performed aimed at revealing the transverse migration of earthquakes (M ≥ 6.5) directed from the Japan and Kuril–Kamchatka trenches toward the Asian continent in the time period from 1960 to 2015. The migration of earthquakes along the profile crossing Hokkaido Island is transferred at velocities of 15 and 23 km/yr, whereas the migration velocity from the Kuril–Kamchatka Trench via Sakhalin Island is estimated to be from 20 to 40 km/yr at various depths. We focus on the insufficient study
of the impact of the Western Pacific subduction on the generation of the deformation field in mainland Asia.
... In recent years, new techniques have been developed to investigate the seismic process using modern information science technologies that provide the processing and analysis of large amounts of the initial datasets [7,8,20,21,24,32,40]. ...
... The Priamurye territory is located in the northeastern part of the Amurian plate, near its junction with the Eurasian and Pacific plates. This region experiences horizontal compression due to the east-west displacement of the Amurian plate resulted from the long-distance Indo-Eurasian plate collision [12,29,30] and reciprocal compression due to subduction of the Pacific Plate [24]. ...
... It was reported in [29] that western compression causes the southwest-northeast migration of large earthquakes with M ≥ 5 at a velocity of 30-50 km/yr and is the main factor that causes deformation in the Priamurye region. This is consistent with a comparative estimate of the geodynamic influence of the Indo-Eurasian collision and the western Pacific subduction zones on the geodynamics of the Baikal Rift zone [24]. It was believed [45] that in central and eastern Asia the earthquakes were caused by fast "decade" (12-45 km/yr) and "secular" (1-7 km/yr) waves of plastic deformation generated due to compression at the Indo-Eurasian lithospheric plate boundary in the Himalayan collision zone. ...
The detection of tectonic fracturing zones in the form of hidden faults, which are not exposed at the surface but are capable of generating intense seismic oscillations and causing hazardous geological phenomena, is a vital problem to be solved in the Priamurye region. We propose a comprehensive approach following which the earthquake migration data are taken as a basis for the detection of hidden faults, while the geophysical and morphostructural data are involved as the additional information for validating the obtained results. In our study, we detail the earthquake migration tendencies and estimate the migration direction and
velocity. Based on these data, tectonic fracturing zones are identified and the hidden faults and their segments where persistent earthquake migration is manifested are revealed in the Priamurye region. The data that establish the direction and velocity of the earthquake epicenter migration will provide forecasting and assessment of natural hazards in the Priamurye region.
The theoretical discovery of slow strain (tectonic) waves, the so-called strain waves in the Earth, served as a motivation to develop physical backgrounds of the mathematical theory of propagation of these waves and to search for methods of their experimental detection. For fifty years, scientists from different
countries in different regions of the Earth, using direct and indirect methods, discovered the migration of crustal deformation and revealed its wave nature, and, therefore, proved the reality of the existence of strain waves of the Earth. This overview briefly describes the history of the development of the concept of strain waves on the Earth, the observation methods and properties of strain waves, and the main types of geological structures generating these waves. The most prominent results of the theoretical, laboratory, and in-situ observations of slow strain migration, including slow earthquakes and periodic Episodic Tremor and Slow (ETS) slip effects, are presented. In the near future, studies of slow strain waves may lead to a fundamental revision of the current concepts about the physics of the seismic process.
—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 features in the behavior of principal stresses. Namely, the maximum deviatoric stresses diverge off the rift axis while the normalized spherical and deviatoric stress tensor components reach high magnitudes in the crust of the Baikal Basin. The obtained stress pattern of the Baikal Rift System is consistent with the rift origin by a joint action of a vertical mantle flow (upwelling branch of convection) and a horizontal flow in the asthenosphere which drives the NW–SE motion of the Amur plate off Eurasia.
The paper is devoted to the identification and study of active neotectonic structures using a formalized
(computerized) analysis of linear elements (lineaments) in the southern part of the junction of the Siberian
Platform with the Baikal Rift Zone (BRZ). The time-varying movements of the Amurian subplate, the
development of the mantle diapir, and the remote effect of the Indo-Eurasian collision combine to determine
structure formation and neotectonic activity of the study region. The geodynamic features of the region are
reflected in the system of small and extended lineaments. The issue is considered on the regional and local
scale levels. Some details of the method and interpretation of the results are discussed. It is shown that a statistical
relationship exists between the parameters of lineament formal identification in satellite images and
kinematics and activation age of the corresponding Cenozoic faults. The lineament analysis (LESSA technology)
is used to assess the effect of BRZ tectonic stresses on the Pliocene-Quaternary movements of the
southern part of the Siberian Platform and on the formation of morphostructures in the region. The stages of
stress-state evolution, fault activity, terrain formation, and some geodynamic models of the development of
the Baikal region are discussed.
