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Title: DEPLOYMENT OF OBS IN THE ARCTIC SEAS: APPLYING FINDINGS TO THE STUDY OF MARINE GEOHAZARDS
DEPLOYMENT OF OBS IN THE ARCTIC SEAS: APPLYING FINDINGS TO THE STUDY OF MARINE GEOHAZARDS

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Artem A. Krylov; Konstantin A. Roginskiy
10.5593/sgem2023/1.1/s05.66
10.5593/sgem2023/1.1
1314-2704
978-619-7603-56-9
English
23
1
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Applied and Environmental Geophysics
The Arctic Seas are of particular interest now in connection with the prospects for their development. At the same time, the construction of critical and industrial infrastructure at sea must be preceded by a thorough assessment of possible geohazards, including dangerous landforms, earthquakes, geofluid outflows, marine landslides, soil liquefaction, tsunamis, etc. The purpose of the study is to highlight various seismological applications of the records obtained recently in the Laptev Sea and other Arctic Seas of the Russian sector by OBS network based on broadband MET sensors, including the analysis of ambient seismic noise, registering the signals of large remote earthquakes and weak local microearthquakes, instrumental approach of the site response assessment. The Laptev Sea is of particular interest as the most seismically active water area of the Russian Arctic. The main characteristics of the OBS architectures turned out to be suitable for obtaining high-quality records under the Arctic conditions to solve seismological problems. For example, the OBS data confirm a general shift of the epicenters cloud towards the eastern part of the Laptev Sea, which was observed according to regional catalogs. This shift can serve as an argument in favor of the hypothesis of the existence of the transcurrent fault zone in this area. The approximate location of this shift is also characterized by a significant number of methane seeps. The confinement of the provinces of gas seeps to large fault areas is possibly also characteristic of other Arctic seas.
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This work was financially supported by the Russian Science Foundation, project no. 23- 17-00125 (processing and demonstration of the OBS records obtained in the Laptev Sea, determination of epicenters location and noise analysis), the Russian State Assignment, project no. FMWE-2021-0011 (technical description of the OBS); the Russian Science Foundation, project no. 21-77-30001 (description of known methane seeps in arctic seas); the Russian President Grant for young scientists, project no. MK- 45.2022.1.5 (demonstration of various geohazards distribution in the Arctic seas).
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https://doi.org/10.5593/sgem2023/1.1/s05.66
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Proceedings of 23rd International Multidisciplinary Scientific GeoConference SGEM 2023
23rd International Multidisciplinary Scientific GeoConference SGEM 2023, 03 - 09 July, 2023
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference-SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Russian Acad Arts; Turkish Acad Sci.
549-556
03 - 09 July, 2023
website
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marine geohazards, ocean-bottom seismographs, Arctic Seas, earthquakes, methane seeps