Affiliation:
1. Baikal Branch of GS RAS
2. Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation of RAS
Abstract
We consider a character of the seismic process in the Baikal region and Transbaikalia in 2016–2017. During the considered period, 17869 earthquakes with KR≥5.6 were registered; 95 % of these seismic events were localized in the Baikal rift zone. The largest earthquakes occurred at the north-eastern flank of the Baikal rift on November 22, 2016 (KR=13.9, Mw=5.0) and April 3, 2017 (KR=13.5, Mw=4.8). Felt effects, not exceeding 5, were observed for 47 regional earthquakes. Focal mechanisms were determined from P-wave first-motion polarities for 73 seismic events (KR≥9.4) and seismic moment tensors (scalar seismic moments, moment magnitudes, focal mechanisms) were calculated from surface wave amplitude spectra and regional P-wave first-motion polarities for 12 seismic events (KR≥11.9, Mw≥4.2). It was found that normal faults and combined types of motions were realized in sources of 94 % of the earthquakes with the obtained focal mechanisms. In general, moderate seismic activity was observed in 2016–2017.
Publisher
Geophysical Survey of the Russian Academy of Sciences - GS RAS
Reference12 articles.
1. Golenetskii, S.I. (1988). [Earthquakes of Baikal Region and Transbaikalia]. In Zemletriaseniia v SSSR v 1985 godu [Earthquakes in USSR in 1985] (pp. 124–135). Moscow, Russia: Nauka Publ. (In Russ.).
2. Gileva, N.A., Melnikova, V.I., Filippova, A.I., Radziminovich, Y.B., & Kobeleva, Е.А. (2021). [Muyakan earthquake sequence in 2015 (Northern Baikal Region)]. Zemletriaseniia Severnoi Evrazii [Earthquakes in Northern Eurasia], 24(2015), 245–257. (In Russ.). doi: 10.35540/1818-6254.2021.24.24
3. Lander, A.V. (2018). [The program for calculating and graphically representing the mechanisms of earthquake sources by the signs of the first arrivals of P-waves (FA)]. Certificate of state registration of the computer program № 2018662004. (In Russ.).
4. Seredkina, A.I., & Melnikova, V.I. (2014). Seismic moment tensor of Pribaikalye earthquakes from the surface-wave amplitude spectra. Izvestiya, Physics of the Solid Earth, 50(3), 403–414. doi: 10.1134/S1069351314030094
5. Melnikova, V.I., Gileva, N.A., Kurushin, R.A., Masalsky, O.K., & Shlaevskaya, N.S. (2003). [Allocation of conditional areas for annual reviews of seismicity in the Baikal and Transbaikal regions]. In Zemletriaseniia Severnoi Evrazii v 1997 godu [Earthquakes of Northern Eurasia, 1997] (pp. 107–117). Obninsk, Russia: FOP Publ. (In Russ.).
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