SEISMIC HAZARD MAPS OF THE NORTH-WEST AND CENTRAL CAUCASUS ON A DETAILED SCALE

V.A. Akimov1, V.A. Zaitsev2, A.S. Larkov3, A.I. Lutikov3, A.N. Ovsyuchenko3,
L.V. Panina
2, E.A. Rogozhin3, S.N. Rodina3, A.I. Sysolin3

1  Civil Defense and Disaster Management All Russian Science Research Institutu Ministry of Russian Federation for Civil Defense, Emergency and Elimination of Consequences of Natural Disasters (Federal Center of Science and High Technologies) (FC VNII GoChS Emercom of Russia), Moscow, Russia

2 Lomonosov Moscow State University, Geological Faculty, Moscow, Russia

3 Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia

Corresponding author: E.A. Rogozhin, e-mail: eurog@ifz.ru

Abstract. The results of a new generalization of data on seismic hazard of the Northwest and Central sectors of the Greater Caucasus are presented. A fundamentally new model of the seismotectonic basis for the seismic hazard map of the region has been prepared. On the basis of this model calculations of seismic influences on a probabilistic basis are made. The work included three stages. At the first stage, seismotectonic studies were carried out, as a result of which a seismotectonic model was created and a map of the zones of possible centers of earthquakes was compiled. At the second stage, seismicity and seismic mode were studied in detail. The third stage included the calculation of the frequency of seismic shakes of various intensities in the study area based on the parameters of the macroseismic field equation, seismic activity patterns, zones of possible earthquake sources and the slope of the frequency of the earthquakes. As a result, seismic hazard maps were compiled. The northwestern and central segments of the Greater Caucasus look like a seismic hazardous area, where the level of seismic impacts reaches 8.5 points on maps A and B. At the same time, in comparison with the data from the OSR-97 and OSR-2015 maps, the results obtained look more differentiated and generally significantly reduce the level of seismic hazard in the region. The work is important from a methodological point of view in the light of seismic risk management of this densely populated and actively developed territory of Russia.

Keywords: earthquakes, seismic hazard assessment, Caucasus, seismotectonics, paleoseismogeology, seismic shaking, seismic regime.

About the authors

AKIMOV Valery Alexandrovich – Doctor of Technical Sciences, Professor, Chief Researcher, Civil Defense and Disaster Management All Russian Science Research Institutu Ministry of Russian Federation for Civil Defense, Emergency and Elimination of Consequences of Natural Disasters (Federal Center of Science and High Technologies) (FC VNII GoChS Emercom of Russia). Russia, 121352, Moscow, Davydkovskaya st., 7. Tel.: +7 (985) 928-42-19. E-mail: akimov@vniigochs.ru

ZAITSEV Vladimir Alexandrovich – Candidate of Geological and Mineralogical Sciences, Senior Researcher, Lomonosov Moscow State University, Geological Faculty. Russia, 119991, Moscow, Leninskye Gory, 1. Tel.: +7 (916) 552-79-04. E-mail: v.zaitsev@mail.ru

LARKOV Alexander Sergeevich – Science Researcher, Schmidt Institute of Physics of the Earth, Russian Academy of Sciences. Russia, 123242, Moscow, Bolshaya Gruzinskaya st., 10-1. Tel.: +7 (499) 254-92-50. E-mail: las119@yandex.ru

LUTIKOV Alexander Ivanovich – Candidate of Physical and Mathematical Sciences, Leading Researcher, Schmidt Institute of Physics of the Earth, Russian Academy of Sciences. Russia, 123242, Moscow, Bolshaya Gruzinskaya st., 10-1. Tel.: +7 (499) 254-99-50. E-mail: ail@ifz.ru

OVSYUCHENKO Alexander Nikolaevich – Candidate of Geological and Mineralogical Sciences, Head of Laboratory, Schmidt Institute of Physics of the Earth, Russian Academy of Sciences. Russia, 123242, Moscow, Bolshaya Gruzinskaya st., 10-1. Tel.: +7 (499) 254-90-15. E-mail: ovs@ifz.ru

PANINA Lyudmila Viktorovna – Candidate of Geological and Mineralogical Sciences, Associate Professor, Lomonosov Moscow State University, Geological Faculty. Russia, 119991, Moscow, Leninskye Gory, 1. Tel.: +7 (917) 519-54-40. E-mail: panina53@mail.ru

ROGOZHIN Evgeny Alexandrovich – Doctor of Geological and Mineralogical Sciences, Professor, Head of Department, Schmidt Institute of Physics of the Earth, Russian Academy of Sciences. Russia, 123242, Moscow, Bolshaya Gruzinskaya st., 10-1. Tel.: +7 (499) 254-87-15. E-mail: eurog1947@yandex.ru

RODINA Svetlana Nikolaevna – Candidate of Geological and Mineralogical Sciences, Senior Researcher, Schmidt Institute of Physics of the Earth, Russian Academy of Sciences. Russia, 123242, Moscow, Bolshaya Gruzinskaya st., 10-1. Tel.: +7 (499) 254-92-50. E-mail: rodina@ifz.ru

SYSOLIN Alexander Ivanovich – Researcher, Schmidt Institute of Physics of the Earth, Russian Academy of Sciences. Russia, 123242, Moscow, Bolshaya Gruzinskaya st., 10-1. Tel.: +7 (499) 254-53-50. e-mail: alexandr.sysolin@gmail.com

Cite this article as: Akimov V.A., Zaitsev V.A., Larkov A.S., Lutikov A.I., Ovsyuchenko A.N., Panina L.V., Rogozhin E.A., Rodina S.N., Sysolin A.I. Seismic hazard maps of the North-West and Central Caucasus on a detailed scale, Voprosy Inzhenernoi Seismologii (Problems of Engineering Seismology). 2019. V. 46, No. 4. P. 57–74 [in Russian]. https://doi.org/10.21455/VIS2019.4-4

English translation of the article will be published in Seismic Instruments, ISSN: 0747-9239 (Print) 1934-7871 (Online), https://link.springer.com/journal/11990