Problems of Engineering Seismology: article

The June 8, 2022, MW 5.2 earthquake in the Southern Baikal region: Macroseismic data analysis
Ya.B. Radziminovich 1 O.F. Lukhneva 2 A.V. Novopashina 2,3 L.R. Tсydypova 4 Ts.A. Tubanov 4,5 N.A. Gileva 1
1 Baikal Branch of the Federal Research Center “Geophysical Survey of Russian Academy of Sciences” 2 Institute of the Earth’s Crust of the Siberian Branch of the Russian Academy of Sciences 3 Irkutsk National Research Technical University 4 Dobretsov Geological Institute of the Siberian Branch of the Russian Academy of Sciences 5 Buryat Branch of the Federal Research Center “Geophysical Survey of Russian Academy of Sciences”
Journal: Problems of Engineering Seismology
Tome: 50
Number: 2
Year: 2023
Pages: 25-48
UDK: 550.348
DOI: 10.21455/VIS2023.2-2
Keywords: earthquake, macroseismic data, on-line questionnaire, Southern Baikal region
Аnnotation: The article deals with macroseismic data on the June 8, 2022, MW = 5.2 earthquake that occurred near the Goloustnaya River delta (Southern Baikal Region). This is the strongest seismic event in the local area over a 40-year period. Macroseismic data were collected through the field survey in the near-field and also using an Internet survey of the population of the Southern Baikal region. As a result, macroseismic data were obtained from 255 populated places. The strongest macroseismic effects were observed at points both on the western and eastern coasts of Lake Baikal at epicentral distances from 18 to 67 km. The maximum observed intensity is estimated as V–VI SIS-17 scale. Strong shakings of intensity V were observed at distances from 35 to 191 km; macroseismic effects corresponding to intensity IV were noted at a distance of up to 330 km. The June 8, 2022 earthquake revealed the problem of the Internet questionnaire vulnerability in relation to heavy overload of the server due to the large number of requests received immediately after a strong seismic impact. The results obtained are useful in seismic risk assessment and clarification of the seismic hazard in the Southern Baikal region, as well as in the framework of the further development of macroseismic studies in Eastern Siberia.