PRACTICE OF THE NORTH-WEST CAUCASUS DETAILED SEISMIC ZONING, TAKING INTO ACCOUNT THE RESULTS OF PALEOSEISMOLOGICAL STUDIES
A.I. Lutikov1, 2, E.A. Rogozhin2, 3, A.N. Ovsyuchenko2, G.Yu. Dontsova1, S.N. Rodina2, A.S. Larkov2, A.I. Sysolin2, V.A. Akimov4
1 Federal Research Center «Unified Geophysical Survey of the Russian Academy of Sciences» (FRC «UGS RAS»), Obninsk, Russia
2 Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia
3 Geophysical Institute – the Affiliate of the Vladikavkaz Scientific Center of the Russian Academy of Sciences, Vladikavkaz, Russia, Republic of Northen Ossetia – Alania
4 Civil Defense and Desaster Management All Russian Science Research Institute Ministry of Russian Federation for Civil Defense, Emergency and Elimination of Consequences of Natural Disasters (Federal Center of Science and High Technologies), Moscow, Russia
Corresponding author: E.A. Rogozhin, e-mail: eurog1947@yandex.ru
Abstract. The new generalization of the North-West Caucasus seismic hazard data are given taking into account the influence of paleoseismological studies on the seismic hazard level. An attempt has been made to use the data on paleo-earthquakes for direct seismic hazard assessment by comparing, in accordance with the reccurence law the magnitude of a strong earthquake, with the estimated number of weak seismic events. A fundamentally new seismotectonic base (map of the possible foci of earthquakes zones (PFE)) for compiling detailed seismic hazard maps of the region has been prepared. Based on the map of the PFE zones, seismic impacts are calculated on a probabilistic basis. On the compiled maps, the northwestern and central segments of the Greater Caucasus look like a seismic hazardous area, where the level of seismic effects reaches 8.5 points on maps A and B. At the same time, compared to the data from the CSZ-97 maps, the results look more differentiated and are generally noticeable lower 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: reccurence law, PFE zones, seismic hazard maps, paleoearthquakes, seismic activity, seismic shaking, seismic mode.
About the authors
LUTIKOV Alexander Ivanovich – Candidate of Physical and Mathematical Sciences, Leading Researcher, Federal Research Center «Unified Geophysical Survey of the Russian Academy of Sciences» (FRC «UGS RAS»). Russia, 249035, Kaluga region, Obninsk, Lenin av., 189; Schmidt Institute of Physics of the Earth, Russian Academy of Sciences. 123242, Moscow, Bolshaya Gruzinskaya st., 10, bld. 1. Tel. +7 (499) 254-53-50. E-mail: ail@ifz.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, bld. 1. Tel.: +7 (499) 254-87-15.; Chief Researcher, Geophysical Institute – the Affiliate of the Vladikavkaz Scientific Center of the Russian Academy of Sciences. Russia, Republic of Northern Ossetia–Alania, 362002, Vladikavkaz, Markova st., 93a. Tel.: +7 (8672) 76-40-84. E-mail: eurog1947@yandex.ru
OVSYUCHENKO Alexander Nickolaevich – 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, bld. 1. Tel.: +7 (499) 254-90-15. E-mail: ovs@ifz.ru
DONTSOVA Galina Yuryevna – Research Fellow, Federal Research Center «Unified Geophysical Survey of the Russian Academy of Sciences» (FRC «UGS RAS»). Russia, 249035, Kaluga region, Obninsk, Lenin av., 189. Tel .: +7 (499) 254-02-01. E-mail: donzova@ifz.ru
RODINA Svetlana Nickolaevna – 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, bld. 1. Tel.: +7 (499) 254-92-50. E-mail: rodina@ifz.ru
LARKOV Alexander Sergeevich – Science Researcher, Schmidt Institute of Physics of the Earth, Russian Academy of Sciences. Russia, 123242, Moscow, Bolshaya Gruzinskaya st., 10, bld. 1. Tel.: +7 (499) 254-92-50. E-mail: las119@yandex.ru
SYSOLIN Alexander Ivanovich – Research Fellow, Schmidt Institute of Physics of the Earth, Russian Academy of Sciences. Russia, 123242, Moscow, Bolshaya Gruzinskaya st., 10, bld. 1. Tel.: +7 (499) 254-53-50. E-mail: alsn@ifz.ru
AKIMOV Valery Alexandrovich – Doctor of Technical Sciences, Professor, Chief scientific employee, Honored Scientist of the Russian Federation, Civil Defense and Disaster Management All Russian Science Research Institute 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, Davidkovskaya st., 7. Tel.: +7 (499) 232-25-82 (extension 9022). E-mail: akimov@vniigochs.ru
Cite this article as: Lutikov A.I., Rogozhin E.A., Ovsyuchenko A.N., Dontsova G.Yu., Rodina S.N., Larkov A.S., Sysolin A.I., Akimov V.A. Practice of the North-West Caucasus detailed seismic zoning, taking into account the results of paleoseismological studies, Voprosy Inzhenernoi Seismologii (Problems of Engineering Seismology). 2019. V. 46, No. 3. P. 110–122 [in Russian]. https://doi.org/10.21455/VIS2019.3-7
English translation of the article will be published in Seismic Instruments, ISSN: 0747-9239 (Print) 1934-7871 (Online), https://link.springer.com/journal/11990