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THE MARCH 29, 2019 EARTHQUAKE OCCURRED AT THE WESTERN PART OF THE TUNKA SYSTEM OF THE RIFT BASINS: SOURCE PARAMETERS AND MACROSEISMIC EFFECTS
1 Institute of the Earth’s Crust, Siberian Branch of the Russian Academy of Sciences
2 Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation, Russian Academy of Sciences
3 Baikal Branch of Federal Research Center «Geophysical Survey of Russian Academy of Sciences»
2 Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation, Russian Academy of Sciences
3 Baikal Branch of Federal Research Center «Geophysical Survey of Russian Academy of Sciences»
Journal: Problems of Engineering Seismology
Tome: 47
Number: 2
Year: 2020
Pages: 64-80
UDK: 550.348
DOI: 10.21455/VIS2020.2-4
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RADZIMINOVICH Y.B., SEREDKINA A.I., MELNIKOVA V.I., GILEVA N.A. THE MARCH 29, 2019 EARTHQUAKE OCCURRED AT THE WESTERN PART OF THE TUNKA SYSTEM OF THE RIFT BASINS: SOURCE PARAMETERS AND MACROSEISMIC EFFECTS // . 2020. Т. 47. № 2. С. 64-80. DOI: 10.21455/VIS2020.2-4
@article{RADZIMINOVICHTHE2020,
author = "RADZIMINOVICH, Y. B. and SEREDKINA, A. I. and MELNIKOVA, V. I. and GILEVA, N. A.",
title = "THE MARCH 29, 2019 EARTHQUAKE OCCURRED AT THE WESTERN PART OF THE TUNKA SYSTEM OF THE RIFT BASINS: SOURCE PARAMETERS AND MACROSEISMIC EFFECTS",
journal = "Problems of Engineering Seismology",
year = 2020,
volume = "47",
number = "2",
pages = "64-80",
doi = "10.21455/VIS2020.2-4",
language = "English"
}
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Keywords: Tunka system of the rift basins, seismicity, earthquake, macroseismic data, macroseismic equation
Аnnotation: We consider one of the remarkable earthquakes occurred on March 29, 2019 at the western part of the Tunka system of the rift basins. The epicenter of the seismic event is localized within the Hoytogol basin. Earthquake source parameters - a hypocentral depth (h = 36-37 km), scalar seismic moment (M0 = 1.6·1016 N∙m), moment magnitude (Mw = 4.8) and its focal mechanism - were determined using the joint inversion of surface wave amplitude spectra and P-wave first motion polarities. The focal mechanism demonstrates the predominance of the combination of thrust and strike-slip movements that evidences the upward movements in the Hoytogol basin. The earthquake covered a wide area and was felt with intensity up to III at the epicentral distances up to 490 km. Macroseismic data were obtained using different methods including the interactive questionnaire posted on the website of the Baikal branch of FRC GS RAS. Analysis of the macroseismic data allows us to formulate the task concerning the refinement of the regional macroseismic field equation.
