Russian Journal of Earth Sciences Russian Journal of Earth Sciences Russian Journal of Earth Sciences 1681-1208 109588 10.2205/2025ES001067 bovlcb ОРИГИНАЛЬНЫЕ СТАТЬИ ORIGINAL ARTICLES ОРИГИНАЛЬНЫЕ СТАТЬИ Seismicity of the Eastern Sector of the Russian Arctic During the Instrumental Period of Observations Seismicity of the Eastern Sector of the Russian Arctic During the Instrumental Period of Observations https://orcid.org/0000-0001-9958-5974 Морозов Алексей Николаевич Morozov Aleksey Nikolaevich morozovalexey@yandex.ru https://orcid.org/0000-0002-5007-8311 Ваганова Наталья Владиславовна Vaganova Natalia Vladislavovna

кандидат геолого-минералогических наук;

candidate of geological and mineralogical sciences;

 https://orcid.org/0000-0002-3317-2488 Асминг Владимир Эрнестович Asming Vladimir Ernestovich https://orcid.org/0000-0003-0131-0177 Федоров Иван Сергеевич Fedorov Ivan Sergeevich ifedorov@krsc.ru Перетокин С. А. Peretokin S. A. https://orcid.org/0000-0002-9597-1971 Алтынбек уулу Т. Altynbek uulu T. Институт физики Земли им. О.Ю. Шмидта РАН Россия Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences Russian Federation Геофизический центр Российской Академии Наук RU Geophysical Center of the Russian Academy of Sciences RU Федеральный исследовательский центр комплексного изучения Арктики имени академика Н. П. Лаверова Уральского отделения Российской академии наук Россия N. Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences Russian Federation Федеральный исследовательский центр комплексного изучения Арктики имени академика Н. П. Лаверова Уральского отделения Российской академии наук Архангельск Россия N. Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences Архангельск Russian Federation Кольский филиал Федерального исследовательского центра «Геофизическая служба» РАН Россия Kola Branch, Federal Research Centre “Geophysical Survey” RAS Russian Federation Кольский филиал Федерального государственного бюджетного учреждения науки Федерального исследовательского центра «Единая геофизическая служба Российской академии наук» (КоФ ФИЦ ЕГС РАН) Апатиты Россия Кольский филиал Федерального государственного бюджетного учреждения науки Федерального исследовательского центра «Единая геофизическая служба Российской академии наук» (КоФ ФИЦ ЕГС РАН) Апатиты Russian Federation Институт физики Земли им. О.Ю. Шмидта Российской академии наук Moscow Россия Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences Moscow Russian Federation Центрально-Азиатский институт прикладных геологических наук Киргизия Central-Asian Institute for Applied Geosciences Kyrgyzstan 11 12 2025 11 12 2025 25 6 ES6011 14 10 2025 24 11 2025 https://rjes.ru/en/nauka/article/109588/view

This study examines the spatio-temporal patterns of seismicity in the eastern sector of the Russian Arctic over the entire period of instrumental observations (1900–2022). Based on the most comprehensive set of instrumental data and employing a modern global velocity model together with an improved location algorithm, a consolidated, recalculated, and unified earthquake catalogue was compiled for the period 1900–1961. Its integration with the previously developed unified earthquake catalogue of the Arctic Zone of the Russian Federation for 1962–2022 made it possible to produce a generalized catalogue for the entire region, covering the full instrumental observation period. Using this catalogue, earthquake parameters were compared with the lineament–domain–focal (LDF) models of the GSZ-97 and GSZ-2016 General Seismic Zoning Maps of Russia. It was found that the LDF model of GSZ-2016 shows the best agreement with the instrumental data, whereas the GSZ-97 model requires adjustments to the maximum magnitude (Mmax) values for several domains and lineaments. The results obtained can be used to refine the parameters of the regional seismic regime, improve the reliability of seismic hazard assessments, and ensure the safe operation of infrastructure during the development of natural resources in the Arctic.

This study examines the spatio-temporal patterns of seismicity in the eastern sector of the Russian Arctic over the entire period of instrumental observations (1900–2022). Based on the most comprehensive set of instrumental data and employing a modern global velocity model together with an improved location algorithm, a consolidated, recalculated, and unified earthquake catalogue was compiled for the period 1900–1961. Its integration with the previously developed unified earthquake catalogue of the Arctic Zone of the Russian Federation for 1962–2022 made it possible to produce a generalized catalogue for the entire region, covering the full instrumental observation period. Using this catalogue, earthquake parameters were compared with the lineament–domain–focal (LDF) models of the GSZ-97 and GSZ-2016 General Seismic Zoning Maps of Russia. It was found that the LDF model of GSZ-2016 shows the best agreement with the instrumental data, whereas the GSZ-97 model requires adjustments to the maximum magnitude (Mmax) values for several domains and lineaments. The results obtained can be used to refine the parameters of the regional seismic regime, improve the reliability of seismic hazard assessments, and ensure the safe operation of infrastructure during the development of natural resources in the Arctic.

 Russian Arctic Laptev Sea shelf seismicity earthquake catalogue seismic zoning Russian Arctic Laptev Sea shelf seismicity earthquake catalogue seismic zoning The work was supported by the Russian Science Foundation Grant 21-77-30010-P “System analysis of geophysical process dynamics in the Russian Arctic and their impact on the development and operation of the railway infrastructure”. The authors express their gratitude to the staff members of the GS RAS Archive for their help in the search for the bulletins of the Russian seismic stations. The work was supported by the Russian Science Foundation Grant 21-77-30010-P “System analysis of geophysical process dynamics in the Russian Arctic and their impact on the development and operation of the railway infrastructure”. The authors express their gratitude to the staff members of the GS RAS Archive for their help in the search for the bulletins of the Russian seismic stations.

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