Earthquake on August 6, 2022 in the zone of the West Timan overthrust

Author:

Noskova N.N.1

Affiliation:

1. IG FRC Komi SC UB RAS

Abstract

On August 6, 2022, an earthquake was registered in Komi Republic, in the Udora district. Data from 17 seismic stations with epicentral distances from 227 to 1142 km were involved in processing the seismic event on August 6. The azimuth environment is uneven, the maximum azimuth gap is GAP=111.8°. As a result of instrumental processing, the following parameters were obtained: coordinates 64.023°N, 50.091°E, time at the source t0 =10:21:32 (UTC), depth h=14 km, energy class according to T.G. Rautian KR=10.2, local magnitude ML=3.6, error ellipse Azmajor=40°, Rminor=6.2 km, Rmajor=10.5 km. According to our calculations, the seismic event occurred in the middle reaches of the river Mezen, on the territory of the state natural reserve of regional significance “Udorsky”. The nearest settlements to the epicenter are located only 50 km away and the residents did not feel the earthquake. This area is not mining, so the seismic event is classified by us as a “tectonic earthquake”. The earthquake is confined to the West Timan thrust zone, which is a collision suture of the Russian and Pechora plates. The source at a depth of 14 km is located in the region of pericratonic subsidence covering the northeastern margin of the Russian Plate and the Kanino-Timan belt; on the boundary of the basement of the Mezen syneclise and the Timanid complex thrust over it. The earthquake may have been caused by tectonic pressure from the Pechora plate. This is the first earthquake in the West Timan thrust zone. Earthquakes occur mainly in the northeast of the Russian Plate, within the Volga-Ural anteclise, Mezen and Moscow syneclise. In addition, although the recorded earthquakes are mostly low-magnitude, they reflect the modern tectonic activation of the earth’s crust.

Publisher

Geophysical Survey of the Russian Academy of Sciences - GS RAS

Subject

General Earth and Planetary Sciences,General Environmental Science

Reference25 articles.

1. Akimov, A.P., & Krasilov, S.A. (2020). [WSG software package “Seismic data processing system”]. Certificate of state registration of a computer program No. 2020664678. (In Russ.). EDN: IJOVUE

2. Baluev, A.S., Zhuravlev, V.A., Terekhov, E.N., & Przhiyalgovskii, E.S. (2012). [Tectonics of the White Sea and adjacent areas (The explanatory notes to “The Tectonic map of the White Sea and adjacent areas”, at a scale of 1:1500 000]. Trudy Geologicheskogo instituta [Proceedings of the Geological Institute], 597, 1-104 (In Russ.).

3. Bogatsky, V.I., Kostyuchenko, S.L., Senin, B.V., Sobolev, S.F., & Shipilov, E.V. (1996). Tektonicheskaia karta Barentseva moria i severnoi chasti Evropeiskoi Rossii. Masshtab: 1:2500000. Red. N.A. Bogdanov, V.E. Khain [Tectonic map Barents Sea region and the Northern part of the European Russia. Eds. N.A. Bogdanov, V.E. Khain]. Moscow, Russia: Institute of the Lithosphere RAS & PKO “Cartography” Publ. (In Russ.).

4. Bogdanova, S.V., Pashkevich, I.K., Gorbatschev, R., & Orlyuk, M.I. (1996). Riphean rifting and major Palaeoproterozoic crustal boundaries in the basement of the East European Craton: geology and geophysics. Tectonophysics, 268, 1-21.

5. Fedorov, A.V., Asming, V.E., Jevtjugina, Z.A., & Prokudina, A.V. (2019). Automated seismic monitoring system for the European Arctic. Seismic Instruments, 55(1), 17-23. DOI: 10.3103/S0747923919010067

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3