gtcrustГеодинамика и тектонофизикаGeodynamics & Tectonophysics2078-502XInstitute of the Earth's crust of the Russian Academy of Sciences, Siberian Branch10.5800/GT-2025-16-5-0853buaatygtcrust-2114Research ArticleСОВРЕМЕННАЯ ГЕОДИНАМИКАRECENT GEODYNAMICSЗЕМЛЕТРЯСЕНИЯ ВОСТОЧНОГО СЕКТОРА РОССИЙСКОЙ АРКТИКИ В ПЕРВОЙ ПОЛОВИНЕ ХХ ВЕКАEARTHQUAKES IN THE EASTERN SECTOR OF THE RUSSIAN ARCTIC IN THE FIRST HALF OF THE 20TH CENTURYМорозовА. Н.MorozovA. N.

123242, Москва, ул. Большая Грузинская, 10, стр. 1; 119296, Москва, ул. Молодежная, 3; 163000, Архангельск, наб. Северной Двины, 23

Alexey N. Morozov

10-1 Bolshaya Gruzinskaya St, Moscow 123242; 3 Molodezhnaya St, Moscow 119296; 23 Northern Dvina Emb, Arkhangelsk 163000

morozovalexey@yandex.ruВагановаН. В.VaganovaN. V.

163000, Архангельск, наб. Северной Двины, 23

3 Molodezhnaya St, Moscow 119296

АсмингВ. Э.AsmingV. E.

184209, Апатиты, ул. Ферсмана, 14

14 Fersman St, Apatity 184209

Институт физики Земли им. О.Ю. Шмидта РАН; Геофизический центр РАН; Федеральный исследовательский центр комплексного изучения Арктики им. Н.П. Лаверова УрО РАНРоссияSchmidt Institute of Physics of the Earth, Russian Academy of Sciences; Geophysical Center, Russian Academy of Sciences; Laverov Federal Center for Integrated Arctic Research, Ural Branch of the Russian Academy of SciencesRussian FederationФедеральный исследовательский центр комплексного изучения Арктики им. Н.П. Лаверова УрО РАНРоссияGeophysical Center, Russian Academy of SciencesRussian FederationКольский филиал ФИЦ ЕГС РАНРоссияKola Branch of the Geophysical Survey, Russian Academy of SciencesRussian Federation202517102025165853853Copyright © Морозов А.Н., Ваганова Н.В., Асминг В.Э., 20252025Морозов А.Н., Ваганова Н.В., Асминг В.Э.Morozov A.N., Vaganova N.V., Asming V.E.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.gt-crust.ru/jour/article/view/2114

Параметры землетрясений, зарегистрированных в Арктическом регионе в первой половине ХХ в. и рассчитанных исследователями того времени, до сих пор сохраняются в современных каталогах сейсмических событий. Однако большинство этих параметров было определено преимущественно на основе бюллетеней лишь части сейсмических станций, функционировавших в тот период, с применением устаревших по современным меркам скоростных моделей и алгоритмов локализации, что существенно снижает их точность и достоверность.

В настоящей статье на основе анализа различных источников составлен сводный каталог всех землетрясений, зарегистрированных в 1900–1950 гг. в пределах региона, ограниченного координатами 70.0–90.0° с.ш. и 70.0° в.д. – 170.0° з.д. На основе наиболее полного набора инструментальных данных, с использованием современной скоростной модели и алгоритма локации, адаптированного для работы с записями раннеинструментальных землетрясений, был сформирован уточненный и унифицированный каталог землетрясений восточного сектора Российской Арктики за первую половину ХХ в. Кроме того, был подготовлен дополнительный каталог событий, которые в ряде источников приписывались исследуемому региону, но после пересчета координат эпицентров оказались за пределами рассматриваемой территории. В совокупности в пределах района исследования было зарегистрировано 19 землетрясений с магнитудой Mw от 5.2 до 6.9, главным образом связанных с хребтом Гаккеля и его продолжением на шельфе моря Лаптевых, а также с континентальной частью Северной Якутии. Полученные результаты могут быть использованы для уточнения параметров сейсмического режима, построения геодинамических моделей и анализа напряженно-деформированного состояния земной коры. Кроме того, они имеют прикладное значение при решении задач обеспечения безопасности функционирования промышленных объектов и инфраструктуры в процессе освоения крупных месторождений восточного сектора Российской Арктики.

The parameters of earthquakes recorded in the Arctic region during the early 20th century and calculated by researchers in the first half of the century continue to be used in modern seismic event catalogs. However, these hypocentral parameters are predominantly computed based on bulletins compiled only from a subset of the seismic stations operated during that period, utilizing outdated velocity models and location algorithms, which restricts their accuracy and reliability.

This study presents a consolidated catalog of all earthquakes recorded between 1900 and 1950 within the geographic region bounded by 70.0° to 90.0° N latitude and 70.0° E to 170.0° W longitude. Using the most comprehensive set of instrumental data, a modern velocity model, and a location algorithm adapted for early instrumental earthquakes, a refined catalog of earthquakes was compiled for the eastern sector of the Russian Arctic during the first half of the 20th century. Additionally, a secondary catalog was developed for earthquakes attributed to the region in various sources. However, after recalculating the epicentral coordinates, these events were excluded from the considered area. A total of 19 earthquakes were recorded within the study area, with magnitudes (Mw) ranging from 5.2 to 6.9, primarily associated with the Gakkel Ridge and its continuation on the Laptev Sea shelf, as well as the continental portion of northern Yakutia. The results of this study can be used to refine seismic regime parameters, develop geodynamic models, and investigate the stress–strain state of the Earth’s crust. Furthermore, these results may be applied to address safety concerns in the operation of industrial systems and facilities during the exploration of major deposits in the eastern sector of the Russian Arctic.

восточный сектор Российской Арктикираннеинструментальные землетрясенияуточненный каталог землетрясенийeastern sector of the Russian Arcticearly instrumental earthquakesrefined earthquake catalogИсследование проведено при поддержке РНФ (грант № 21-77-30010-П, Системный анализ динамики геофизических процессов в Российской Арктике и их воздействие на развитие и функционирование инфраструктуры железнодорожного транспорта).The study was supported by the RSF (grant No. 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").ReferencesAmbraseys N., Douglas J., 2000. Reappraisal of Surface Wave Magnitudes in the Eastern Mediterranean Region and the Middle East. Geophysical Journal International 141 (2), 357–373. https://doi.org/10.1046/j.1365-246x.2000.00084.x.Ambraseys N., Douglas J., 2000. 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The authors declare that there are no conflicts of interest present.