Seismicity of the Amur and Primorye region

Safonov, D. A.; Ras, Imgg Feb; Nagornykh, T. V.; Kovalenko, N. S.

doi:10.30730/978-5-6040621-0-4.2019-1

Cited by 8 publications

(2 citation statements)

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“…1). However, the analysis of seismicity in the region has shown that the seismoactive zones and seismolineaments are often localized submeridionally or in the northwestern direction [3,4,5]. Our earlier studies allowed us to distinguish a series of hidden faults of various ranks that are dominantly submerional or NW-trending and, rarely, sublatitudinal.…”

Section: Introductionmentioning

confidence: 90%

Seismic activity of major hidden faults in the Priamurye region

2020

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Based on the data of the relief analysis and the geophysical fields, major submeridional and NW-trending hidden faults are detected in the Priamurye region. The seismic energy calculations are performed for the instrumental observation period given the historical events. The faults showing the highest seismic activity are revealed. The seismic energy released by hidden faults is commensurable with a similar value obtained for the seismoactive faults detected from the geological data.

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Section: Introductionmentioning

confidence: 90%

Seismic activity of major hidden faults in the Priamurye region

2020

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“…Каталог был дополнен механизмами очагов землетрясений по данным ИМГиГ ДВО РАН [Poplavskaya et al, 2011;Safonov et al, 2019]. В наш каталог входят, как правило, только наиболее сильные землетрясения с эпицентрами под территорией Охотского моря, Приморьем и примыкающей к нему территорией Японского моря.…”

Section: Figunclassified

Reconstruction of the Tectonic Stress Field in the Deep Parts of the Southern Kuril-Kamchatka and Northern Japan Subduction Zones

Safonov¹

2020

Geodin. tektonofiz.

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Earthquake focal mechanisms in the Southern Kuril-Kamchatka and Northern Japan subduction zones were analysed to investigate the features of the tectonic stress field inside the Pacific lithospheric plate subducting into the upper mantle. Earthquake focal mechanism (hypocenter depths of more than 200 km) were taken from the 1966– 2018 NIED, IMGiG FEB RAS and GlobalCMT catalogues. The tectonic stress field was reconstructed by the cataclastic analysis method, using a coordinate system related to the subducting plate. In most parts of the studied seismic focal zone, the axis of the principal compression stress approximately coincides with the direction of the Pacific lithospheric plate subduction beneath the Sea of Okhotsk. It slightly deviates towards the hinge zone separating the studied regions. The principal tension stress axis is most often perpendicular to the plate movement, but less stable in direction. This leads to compression relative to the slab in some parts of the studied regions, and causes shearing in others. The hinge zone is marked by the unstable position of the tension axis and high values of the Lode–Nadai coefficient, corresponding to the conditions of uniaxial compression, while the compression direction remains the same, towards the slab movement. Two more areas of uniaxial compression are located below the Sea of Japan at depths of 400–500 km.

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Common features in the manifestation of natural and induced geodynamic events in the eastern regions of Russia and China

Ignatov

Ivannikov

et al. 2019

IOP Conf. Ser.: Earth Environ. Sci.

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The study of geodynamic processes observed in the Earth’s crust at densely populated and commercially developed areas in the east of Russia and China is of great importance for their sustainable development. The research results available show that not only natural, but also man-made geodynamic events associated with mining operations reflect the global geodynamic processes. Geodynamic events that occurred while mining in impact-hazardous areas allowed to identify some common features in the manifestation of natural and man-made geodynamic events in the eastern regions of Russia and China. Thus, both natural and disastrous technogenic geodynamic events (tectonic rock bursts, induced earthquakes, cracking on the earth’s surface) have positional connection with the linear zones of earth’s crust modern destruction (block boundaries and faults). Existing tectonic faults get re-activated during major geodynamic events, i.e. they get displaced in response to the mining operations. Areas hazardous for manifestation of geodynamic phenomena can be defined by geodynamic zoning method which can be used to draft the development programs for the eastern regions of Russia and China

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Seismicity of the Amur and Primorye region

Cited by 8 publications

References 0 publications

Seismic activity of major hidden faults in the Priamurye region

Seismic activity of major hidden faults in the Priamurye region

Reconstruction of the Tectonic Stress Field in the Deep Parts of the Southern Kuril-Kamchatka and Northern Japan Subduction Zones

Common features in the manifestation of natural and induced geodynamic events in the eastern regions of Russia and China

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