BAIKAL and TRANSBAIKALIA

Author:

Melnikova V.1ORCID,Gileva N.2,Seredkina A.3,Masalskii O.2

Affiliation:

1. Institute of the Earth’s Crust of Siberian Branch of the Russian Academy of Sciences

2. Baikal Branch of Geophysical Survey of the Russian Academy of Sciences

3. Pushkov Institute of Terrestrial Magnetism, Iionosphere and Radio Wave Propagation of the Russian Academy of Sciences

Abstract

We considered the character of the seismic process in the Baikal and Transbaikalia region in 2014. 8782 earthquakes with КР≥5.6 were recorded within the study territory during that year, 94 % of them were located in the Baikal rift zone. 26 seismic events were felt in the cities, towns and local settlements with the intensity not exceeding 5. The strongest of them (Mw=5.5) occurred in the Baikal-Muya region of the Baikal rift zone and was followed by a large earthquake sequence. Focal mechanisms were determines for 46 shocks from the data on P-wave first motion polarities, seismic moment tensor (focal mechanism, scalar seismic moment (M0), moment magnitude (Mw) and hypocentral depth (h)) was calculated for 11 events from the data on amplitude surface wave spectra. It has been found that normal fault movements are realized in the sources of 59 % of the earthquakes with the obtained focal mechanisms. In general, high level of seismic activity is a characteristic feature of the considered territory in 2014.

Publisher

Geophysical Survey of the Russian Academy of Sciences - GS RAS

Reference26 articles.

1. Gileva, N.A., Kobeleva, E.A., &Masalskii, O.K. (2020). [Seismic stations of the Baikal Branch of the GS SB RAS (network code BYKL) in 2014]. Zemletriaseniia Severnoi Evrazii [Earthquakes in Northern Eurasia], 23(2014), Appendix on CD. (In Russ.).

2. Tubanov, Ts.A., & Sanjieva, D.P-D. (2020). [Seismic stations of the Buryatian Branch of the GS SB RAS (network code BURS) in 2014]. Zemletriaseniia Severnoi Evrazii [Earthquakes in Northern Eurasia], 23(2014), Appendix on CD. (In Russ.).

3. Golenetskiy, S.I. (1988). [Earthquakes of Baikal and Transbaikalia]. In Zemletryaseniia v SSSR v 1985 godu [Earthquakes in the USSR, 1985] (pp. 124–135). Moscow, Russia: Nauka Publ. (In Russ.).

4. Haydurova, E.V., Gileva, N.A., Leonteva, L.R., Anisimova, L.V., Hamidulina, O.A., Menshikova, Yu.A., Drennova, G.F., Tiguntseva, G.V., Andrusenko, N.A., Horoshih, M.B., Kurilko, G.V., Dvornikova, V.I., Pavlova, L.V., Arhipenko, N.S., Tereshina, E.N., Zibrova, E.S., Borisova, O.A., Fedyushkina, Ya.I., Papkova, A.A., &Galaktionova, N.N. (2020). Katalog (original) zemletriasenii Pribaikal'ia i Zabaikal'ia za 2014 s КР>5.5 (N=8762) [Catalog (original) of the earthquakes of Baikal and Transbaikalia for 2014 with the КР>5.5 (N=8782)]. Irkutsk, Russia: Funds BB GS SB RAS, 149 p. (In Russ.).

5. Haydurova, E.V., Gileva, N.A., Leonteva, L.R., Anisimova, L.V., Hamidulina, O.A., Menshikova, Yu.A., Drennova, G.F., Tiguntseva, G.V., Andrusenko, N.A., Horoshih, M.B., Kurilko, G.V., Dvornikova, V.I., Pavlova, L.V., Arhipenko, N.S., Tereshina, E.N., Zibrova, E.S., Borisova, O.A., Fedyushkina, Ya.I, Papkova, A.A., & Galaktionova, N.N. (2020). [Catalog of earthquakes of Baikal and Transbaikalia for 2014 with the КР>7.5]. Zemletriaseniia Severnoi Evrazii [Earthquakes in Northern Eurasia], 23(2014), Appendix on CD. (In Russ.).

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1. SEISMICITY of BAIKAL and TRANSBAIKALIA in 2015;Earthquakes in Northern Eurasia;2021-12-14

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