The Main Criteria for Allocating Earthquake Chains in the Baikal Region Lithosphere

Klyuchevskii, А. V.; Kakourova, A.A.

doi:10.26516/2073-3402.2018.23.64

Cited by 4 publications

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“…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].…”

Section: Introductionmentioning

confidence: 99%

The propagation velocity of seismic activity migrating along the directions of the geodynamic forces prevailing in the northeastern Baikal rift system, Russia

Novopashina

Лухнева

2021

Annals of Geophysics

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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.

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Section: Introductionmentioning

confidence: 99%

The propagation velocity of seismic activity migrating along the directions of the geodynamic forces prevailing in the northeastern Baikal rift system, Russia

Novopashina

Лухнева

2021

Annals of Geophysics

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Quasilinear Chains of Earthquakes in Clusters of Seismic Events: The Baikal Rift System

Kakourova,

Dzhurik,

Bryzhak

et al. 2024

J. Volcanolog. Seismol.

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Quasilinear Earthquake Chains in Groups of Seismic Events Baikal Rift System

Kakourova,

Dzhurik,

Bryzhak

et al. 2024

Vulkanologiâ i sejsmologiâ

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Identification of a large number of quasi-linear chains of earthquakes in the epicentral seismicity field of the Baikal region and their study showed that among these chains there may be not only chains of “migration” earthquakes, but also chains formed during a random spatio-temporal distribution of earthquakes. In this work, using a statistical analysis of the distribution of distances between epicenters, the possibility of forming chains of “migrations” within groups of seismic events is shown and their distribution is studied. It is noted that chains in groups of earthquakes are distinguished not only by the distribution of distances, but also by the time between them. The formation of chains of earthquakes was established in the areas of the following groups of earthquakes: Busiyingol and 1976 and 1991. in the same area, the South Baikal, Kyakhtinsky, Kichersky earthquakes of the Tompudinsky series, Oldongsinsky and Charudinsky groups. It is shown that these chains were formed during the implementation of these groups. In the identified areas of concentration of chains of grouping seismicity, a connection can be traced between the location and direction of the chains with the strike of fault zones, near-fault cracks and the orientation of nodal planes in earthquake sources.

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The Main Criteria for Allocating Earthquake Chains in the Baikal Region Lithosphere

Cited by 4 publications

References 0 publications

The propagation velocity of seismic activity migrating along the directions of the geodynamic forces prevailing in the northeastern Baikal rift system, Russia

The propagation velocity of seismic activity migrating along the directions of the geodynamic forces prevailing in the northeastern Baikal rift system, Russia

Quasilinear Chains of Earthquakes in Clusters of Seismic Events: The Baikal Rift System

Quasilinear Earthquake Chains in Groups of Seismic Events Baikal Rift System

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