Modern Low-Magnitude Earthquake Swarms of the Gakkel Mid-Oceanic Ridge, Arctic Ocean
Earthquakes at mid-ocean ridges (MOR) reflect the active magmatic and tectonic processes that form new oceanic crust. Active spreading processes of ultraslow ridges, with spreading rates of less than 20 mm/yr, are still poorly understood compared to the MOR in the Atlantic and Pacific oceans, with s...
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| Format: | Article |
| Language: | English |
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Russian Academy of Sciences, The Geophysical Center
2023-08-01
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| Series: | Russian Journal of Earth Sciences |
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| Online Access: | http://doi.org/10.2205/2023es000843 |
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| author | Morozov Aleksey Vaganova Natalia Starkov Ivan Mikhaylova Yana |
| author_facet | Morozov Aleksey Vaganova Natalia Starkov Ivan Mikhaylova Yana |
| author_sort | Morozov Aleksey |
| collection | DOAJ |
| description | Earthquakes at mid-ocean ridges (MOR) reflect the active magmatic and tectonic processes that form new oceanic crust. Active spreading processes of ultraslow ridges, with spreading rates of less than 20 mm/yr, are still poorly understood compared to the MOR in the Atlantic and Pacific oceans, with spreading rates of more than 25 mm/yr. Thanks to the installation of stationary seismic stations in the 21st century on the Arctic archipelagos of Franz Josef Land and Severnaya Zemlya, it became possible to record and study low-magnitude grouping earthquakes within the Gakkel Ridge, including swarm sequences of earthquakes. This article presents the first results of registration, location and study of swarm sequences of low-magnitude earthquakes within the Gakkel Ridge for the period from 2012 to 2022. It is shown that swarm sequences are recorded to a greater extent in the western volcanic and eastern volcanic segments of the ridge, while no such sequences were found within the central amagmatic segment. The structure formation of this part of the ridge is dominated by tectonic rather than magmatic and metamorphic processes. Two large swarm of low-magnitude earthquakes that occurred in the eastern volcanic segment of the ridge are considered in detail. |
| format | Article |
| id | doaj-art-50fad4b9be0f49a5b8e5e640624c567e |
| institution | DOAJ |
| issn | 1681-1208 |
| language | English |
| publishDate | 2023-08-01 |
| publisher | Russian Academy of Sciences, The Geophysical Center |
| record_format | Article |
| series | Russian Journal of Earth Sciences |
| spelling | doaj-art-50fad4b9be0f49a5b8e5e640624c567e2025-08-20T03:16:14ZengRussian Academy of Sciences, The Geophysical CenterRussian Journal of Earth Sciences1681-12082023-08-0123311610.2205/2023es000843Modern Low-Magnitude Earthquake Swarms of the Gakkel Mid-Oceanic Ridge, Arctic OceanMorozov Aleksey0https://orcid.org/0000-0001-9958-5974Vaganova Natalia1https://orcid.org/0000-0002-5007-8311Starkov Ivan2https://orcid.org/0000-0002-6567-6357Mikhaylova Yana3https://orcid.org/0000-0002-6600-1220Schmidt Institute of Physics of the Earth of the Russian Academy of SciencesN. Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of SciencesFederal Research Center for Integrated Study of the Arctic named after Academician N.P. Laverov, Ural Branch of the Russian Academy of SciencesN. Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of SciencesEarthquakes at mid-ocean ridges (MOR) reflect the active magmatic and tectonic processes that form new oceanic crust. Active spreading processes of ultraslow ridges, with spreading rates of less than 20 mm/yr, are still poorly understood compared to the MOR in the Atlantic and Pacific oceans, with spreading rates of more than 25 mm/yr. Thanks to the installation of stationary seismic stations in the 21st century on the Arctic archipelagos of Franz Josef Land and Severnaya Zemlya, it became possible to record and study low-magnitude grouping earthquakes within the Gakkel Ridge, including swarm sequences of earthquakes. This article presents the first results of registration, location and study of swarm sequences of low-magnitude earthquakes within the Gakkel Ridge for the period from 2012 to 2022. It is shown that swarm sequences are recorded to a greater extent in the western volcanic and eastern volcanic segments of the ridge, while no such sequences were found within the central amagmatic segment. The structure formation of this part of the ridge is dominated by tectonic rather than magmatic and metamorphic processes. Two large swarm of low-magnitude earthquakes that occurred in the eastern volcanic segment of the ridge are considered in detail.http://doi.org/10.2205/2023es000843Gakkel Ridge low-magnitude earthquakes Arctic earthquake swarm Arctic Ocean |
| spellingShingle | Morozov Aleksey Vaganova Natalia Starkov Ivan Mikhaylova Yana Modern Low-Magnitude Earthquake Swarms of the Gakkel Mid-Oceanic Ridge, Arctic Ocean Russian Journal of Earth Sciences Gakkel Ridge low-magnitude earthquakes Arctic earthquake swarm Arctic Ocean |
| title | Modern Low-Magnitude Earthquake Swarms of the Gakkel Mid-Oceanic Ridge, Arctic Ocean |
| title_full | Modern Low-Magnitude Earthquake Swarms of the Gakkel Mid-Oceanic Ridge, Arctic Ocean |
| title_fullStr | Modern Low-Magnitude Earthquake Swarms of the Gakkel Mid-Oceanic Ridge, Arctic Ocean |
| title_full_unstemmed | Modern Low-Magnitude Earthquake Swarms of the Gakkel Mid-Oceanic Ridge, Arctic Ocean |
| title_short | Modern Low-Magnitude Earthquake Swarms of the Gakkel Mid-Oceanic Ridge, Arctic Ocean |
| title_sort | modern low magnitude earthquake swarms of the gakkel mid oceanic ridge arctic ocean |
| topic | Gakkel Ridge low-magnitude earthquakes Arctic earthquake swarm Arctic Ocean |
| url | http://doi.org/10.2205/2023es000843 |
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