Extended search
Strong earthquakes in the Northern Baikal region in 2016–2017 (МW=5.0 and МW=4.8)
1 Institute of the Earth’s Crust of the Siberian Branch of the Russian Academy of Sciences
2 Baikal Branch of the Federal Research Center «Geophysical Survey of Russian Academy of Sciences»
3 Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation of RAS
Journal: Problems of Engineering Seismology
Tome: 49
Number: 2
Year: 2022
Pages: 56-73
UDK: 550.348.098.32 (571.53/.55)
DOI: 10.21455/VIS2022.2-3
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Melnikova
N.A V.I. Strong earthquakes in the Northern Baikal region in 2016–2017 (МW=5.0 and МW=4.8) // . 2022. Т. 49. № 2. С. 56-73. DOI: 10.21455/VIS2022.2-3
@article{Melnikova
N.AStrong2022,
author = "Melnikova
N.A, V. I.",
title = "Strong earthquakes in the Northern Baikal region in 2016–2017 (МW=5.0 and МW=4.8)",
journal = "Problems of Engineering Seismology",
year = 2022,
volume = "49",
number = "2",
pages = "56-73",
doi = "10.21455/VIS2022.2-3",
language = "English"
}
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Keywords: earthquake, instrumental and macroseismic data, seismic moment tensor, Baikal rift
Аnnotation: We present results of the detailed study of two relatively strong seismic events – the November 22, 2016 (MW=5.0) and April 03, 2017 (MW=4.8) – occurred at the north-eastern flank of the Baikal rift zone in the areas of the South Muya and Kalar Ranges. Both the events were followed by weak aftershocks (N=178–539, КR≤11.0) whose epicenters were localized in compact spatial regions. Seismic moment tensors and hypocentral depths of the mainshocks were calculated from surface wave amplitude spectra. It has been shown that their sources were formed under the influence of the subhorizontal SE-NW extension and the subhorizontal or inclined NE-SW compression. This result well agrees with the rift stress field dominated within the study area. Both the earthquakes were felt at the epicentral distances up to 500 km. In the area of the Baikal-Amur Railway, their shaking intensity was IV–V. The results obtained can be used in continuous seismic monitoring at the north-eastern flank of the Baikal rift zone and can contribute to objective seismic hazard assessment of the study area.
