MODERN LOW-MAGNITUDE EARTHQUAKE SWARMS OF THE GAKKEL MID-OCEANIC RIDGE, ARCTIC OCEAN

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Abstract

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.

About the authors

Aleksey Nikolaevich Morozov

Schmidt Institute of Physics of the Earth, Russian Academy of Science

Email: morozovalexey@yandex.ru

Natalia Vladislavovna Vaganova

Federal Research Center for Integrated Study of the Arctic named after Academician N.P. Laverov, Ural Branch of the Russian Academy of Sciences

candidate of geological and mineralogical sciences 2017

Ivan Vladimirovich Starkov

Federal Research Center for Integrated Study of the Arctic named after Academician N.P. Laverov, Ural Branch of the Russian Academy of Sciences

Yana Aleksandrovna Mikhaylova

Federal Research Center for Integrated Study of the Arctic named after Academician N.P. Laverov, Ural Branch of the Russian Academy of Sciences

Email: mikhailovayana@gmail.com

References

  1. Аветисов Г. П. Сейсмоактивные зоны Арктики. — СПб : ВНИИОкеангеология, 1996. — С. 185.
  2. Акимов А. П., Красилов С. А. Программный комплекс WSG «Система обработки сейсмических данных». Свидетельство о государственной регистрации программы для ЭВМ No 2020664678 от 16.11.2020 г. — 2020.
  3. Гуревич В. Ю., Астафурова Н. И., Глебовский Е. Г. и др. Некоторые особенности аккреции коры у оси западной части ультранизкоскоростного хребта Гаккеля, Северный Ледовитый океан // Геолого-геофизические характеристики литосферы Арктического региона. — 2004. — Т. 5. — С. 87—97.
  4. Дубинин Е. П., Кохан А. В., Сущевская Н. М. Тектоника и магматизм ультрамедленных спрединговых хребтов // Геотектоника. — 2013. — Вып. 3, № 3. — С. 3—30. — HTTPS://DOI.ORG/10.7868/s0016853x13030028.
  5. Кохан А. В. Морфология рифтовых зон ультрамедленного спрединга (хребты Рейкьянес, Книповича и Гаккеля) // Вестник Московского университета. Серия 5: География. — 2013. — Т. 2. — С. 61—69.
  6. Мирзоев К. М. Рекомендации по выделению групповых землетрясений // Вопросы инженерной сейсмологии (Инженерно-сейсмологические исследования для районирования сейсмической опасности). — 1992. — Т. 33. — С. 53—57.
  7. Молчан Г. М., Дмитриева О. Е. Идентификация афтершоков: обзор и новые подходы // Современные методы интерпретации сейсмологических данных. Вычислительная сейсмология. Т. 24. — Москва : Наука, 1991. — С. 19—50.
  8. Морозов А. Н., Ваганова Н. В. Годографы региональных волн P и S для районов спрединговых хребтов Евро-Арктического региона // Вулканология и сейсмология. — 2017. — № 2. — С. 59—67. — HTTPS://DOI.ORG/10.7868/s0203030617020055.
  9. Морозов А. Н., Ваганова Н. В., Асминг В. Э. и др. Шкала ML для западной части Евразийской Арктики // Российский сейсмологический журнал. — 2020. — Т. 2, № 4. — С. 63—68. — HTTPS://DOI.ORG/10.35540/2686-7907.2020.4.06.
  10. Рекант П. В., Гусев Е. А. Структура и история формирования осадочного чехла рифтовой зоны хребта Гаккеля (Северный Ледовитый океан) // Геология и геофизика. — 2016. — Т. 57, № 9. — С. 1634—1640. — HTTPS://DOI.ORG/10.15372/gig20160903.
  11. Смирнов В. Б. Прогностические аномалии сейсмического режима. I. Методические основы подготовки исходных данных // Геофизические исследования. — 2009. — Т. 10, № 2. — С. 7—22.
  12. Шебалин П. Н. Цепочки эпицентров как индикатор возрастания радиуса корреляции сейсмичности перед сильными землетрясениями // Вулканология и сейсмология. — 2005. — № 1. — С. 3—15.
  13. Antonovskaya G., Morozov A., Vaganova N., et al. Seismic monitoring of the European Arctic and Adjoining Regions // The Arctic. Current Issues and Challenges. — 2020. — P. 303–368.
  14. Asming V., Prokudina A. System for automatic detection and location of seismic events for arbitrary seismic station configuration NSDL // European Seismological Commission. — 2016. — P. 2016–373.
  15. Bohnenstiehl D. R., Dziak R. P. Mid-ocean ridge seismicity // Encyclopedia of Ocean Sciences / ed. by J. Steele, S. Thorpe, K. Turekian. — London : Academic Press, 2008.
  16. Cochran J. R. Seamount volcanism along the Gakkel Ridge, Arctic Ocean // Geophysical Journal International. — 2008. — Vol. 174, no. 3. — P. 1153–1173. — HTTPS://DOI.ORG/10.1111/j.1365-246x.2008.03860.x.
  17. Crotwell H. P., Owens T. J., Ritsema J. The TauP Toolkit: Flexible Seismic Travel-Time and Raypath Utilities // Seismological Research Letters. — 1999. — Vol. 70, no. 2. — P. 154–160. — HTTPS://DOI.ORG/10.1785/gssrl.70.2.154.
  18. Dziewonski A. M., Anderson D. L. Preliminary reference Earth model // Physics of the Earth and Planetary Interiors. — 1981. — Vol. 25, no. 4. — P. 297–356. — HTTPS://DOI.ORG/10.1016/0031-9201(81)90046-7.
  19. Edwards M. H., Kurras G. J., Tolstoy M., et al. Evidence of recent volcanic activity on the ultraslow-spreading Gakkel ridge // Nature. — 2001. — Vol. 409, no. 6822. — P. 808–812. — HTTPS://DOI.ORG/10.1038/35057258.
  20. Engen Ø., Eldholm O., Bungum H. The Arctic plate boundary // Journal of Geophysical Research: Solid Earth. — 2003. — Vol. 108, B2. — P. 1–17. — HTTPS://DOI.ORG/10.1029/2002jb001809.
  21. Fedorov A. V., Asming V. E., Jevtjugina Z. A., et al. Automated Seismic Monitoring System for the European Arctic // Seismic Instruments. — 2019. — Vol. 55, no. 1. — P. 17–23. — HTTPS://DOI.ORG/10.3103/s0747923919010067.
  22. Fox C. G., Radford W. E., Dziak R. P., et al. Acoustic detection of a seafloor spreading episode on the Juan de Fuca Ridge using military hydrophone arrays // Geophysical Research Letters. — 1995. — Vol. 22, no. 2. — P. 131–134. — HTTPS://DOI.ORG/10.1029/94gl02059.
  23. Frohlich C., Davis S. D. Single-link cluster analysis as a method to evaluate spatial and temporal properties of earthquake catalogues // Geophysical Journal International. — 1990. — Vol. 100, no. 1. — P. 19–32. — HTTPS://DOI.ORG/10.1111/j.1365-246x.1990.tb04564.x.
  24. GEOFON. — 2014. — URL: https://geofon.gfz-potsdam.de/ (visited on 03/31/2023).
  25. Global CMT Catalog. — 2013. — URL: https://www.globalcmt.org/CMTsearch.html (visited on 03/31/2023).
  26. Havskov J., Bormann P., Schweitzer J. Earthquake location // New Manual of Seismological Observatory Practice (NMSOP). — Deutsches GeoForschungsZentrum GFZ, 2009. — P. 1–28.
  27. Hess H. H. Petrologie Studies. A Volume in Honour of Buddington. — New York : The Geological Society of American, 1962. — P. 660.
  28. International Seismological Centre (ISC). — 1964. — URL: http://www.isc.ac.uk/ (visited on 03/31/2023).
  29. Kennett B. L. N. Seismological tables: ak135. — Australia, Canberra : Research School of Earth Sciences. Australian National University, 2005. — P. 289.
  30. Korger E. I. Seismicity and structure of a magmatic accretionary centre at an ultraslow spreading ridge: The volcanic centre at 85E/85N, Gakkel Ridge. — University of Bremen, 2013. — P. 159.
  31. Maus S., Barckhausen U., Berkenbosch H., et al. EMAG2: A 2–arc min resolution Earth Magnetic Anomaly Grid compiled from satellite, airborne, and marine magnetic measurements // Geochemistry, Geophysics, Geosystems. — 2009. — Vol. 10, no. 8. — P. 08005. — HTTPS://DOI.ORG/10.1029/2009gc002471.
  32. Michael P. J., Langmuir C. H., Dick H. J. B., et al. Magmatic and amagmatic seafloor generation at the ultraslow-spreading Gakkel ridge, Arctic Ocean // Nature. — 2003. — Vol. 423, no. 6943. — P. 956–961. — HTTPS://DOI.ORG/10.1038/nature01704.
  33. Morozov A., Vaganova N. Earthquake catalog of the Gakkel mid-ocean ridge (Arctic Ocean) according to the data of the
  34. Arkhangelsk seismic network (AH code) for the period from 2013 to 2022. — 2023. — HTTPS://DOI.ORG/10.31905/smupnwep.
  35. Morozov A. N., Vaganova N. V., Antonovskaya G. N., et al. Low-Magnitude Earthquakes at the Eastern Ultraslow-Spreading Gakkel Ridge, Arctic Ocean // Seismological Research Letters. — 2021. — Vol. 92, no. 4. — P. 2221–2233. — HTTPS://DOI.ORG/10.1785/0220200308.
  36. Müller C., Jokat W. Seismic evidence for volcanic activity discovered in central Arctic // Eos, Transactions American Geophysical Union. — 2000. — Vol. 81, no. 24. — P. 265. — HTTPS://DOI.ORG/10.1029/00eo00186.
  37. N. Laverov Federal Center for Integrated Arctic Research. Arkhangelsk Seismic Network. — 2002. — HTTPS://DOI.ORG/10.7914/SN/AH.
  38. Omori F. On aftershocks of earthquakes // Journal of the College of Science. — 1894. — Vol. 7. — P. 111–200. ORFEUS. — 2022. — URL: https://orfeus-eu.org/ (visited on 05/12/2022).
  39. Petrov O., Morozov A., Shokalsky S., et al. Crustal structure and tectonic model of the Arctic region // Earth-Science Reviews. — 2016. — Vol. 154. — P. 29–71. — HTTPS://DOI.ORG/10.1016/j.earscirev.2015.11.013.
  40. Reves-Sohn R., Edmonds H., Humphris S., et al. Scientific scope and summary of the Arctic Gakkel vents (AGAVE) expedition // EOS Transactions American Geophysical Union. Vol. 1. — American Geophysical Union, 2007. — P. 7.
  41. Riedel C., Schlindwein V. Did the 1999 earthquake swarm on Gakkel Ridge open a volcanic conduit? A detailed teleseismic data analysis // Journal of Seismology. — 2010. — Vol. 14, no. 3. — P. 505–522. — HTTPS://DOI.ORG/10.1007/s10950-009-9179-6.
  42. Ringdal F., Kværna T. A multi-channel processing approach to real time network detection, phase association, and threshold monitoring // Bulletin of the Seismological Society of America. — 1989. — Vol. 79, no. 6. — P. 1927–1940. — HTTPS://DOI.ORG/10.1785/BSSA0790061927.
  43. Schlindwein V. Teleseismic earthquake swarms at ultraslow spreading ridges: indicator for dyke intrusions? // Geophysical Journal International. — 2012. — Vol. 190, no. 1. — P. 442–456. — HTTPS://DOI.ORG/10.1111/j.1365-246x.2012.05502.x.
  44. Schlindwein V., Demuth A., Korger E., et al. Seismicity of the Arctic mid-ocean Ridge system // Polar Science. — 2015. — Vol. 9, no. 1. — P. 146–157. — HTTPS://DOI.ORG/10.1016/j.polar.2014.10.001.
  45. Schmid F., Schlindwein V., Koulakov I., et al. Magma plumbing system and seismicity of an active mid-ocean ridge volcano // Scientific Reports. — 2017. — Vol. 7, no. 1. — HTTPS://DOI.ORG/10.1038/srep42949.
  46. Spence W. Relative epicenter determination using P-wave arrival-time differences // Bulletin of the Seismological Society of America. — 1980. — Vol. 70, no. 1. — P. 171–183. — HTTPS://DOI.ORG/10.1785/BSSA0700010171.
  47. Tarasewicz J., Brandsdóttir B., White R. S., et al. Using microearthquakes to track repeated magma intrusions beneath the Eyjafjallajökull stratovolcano, Iceland // Journal of Geophysical Research: Solid Earth. — 2012. — Vol. 117, B9. — P. 1–13. — HTTPS://DOI.ORG/10.1029/2011jb008751.
  48. The Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO). — 1996. — URL: https://www.ctbto.org/ (visited on 03/31/2023).
  49. Thiede J., Oerter H. The Expedition ANTARKTIS XVII/2 of the Research Vessel POLARSTERN in 2000. Vol. 404. — Bremerhaven : Alfred Wegener Institute for Polar, Marine Research, 2002. — P. 245.
  50. Tolstoy M., Bohnenstiehl D. R., Edwards M. H., et al. Seismic character of volcanic activity at the ultraslow-spreading Gakkel Ridge // Geology. — 2001. — Vol. 29, no. 12. — P. 1139. — HTTPS://DOI.ORG/10.1130/0091-7613(2001)029<1139:scovaa>2.0.co;2.
  51. Wanless V. D., Behn M. D., Shaw A. M., et al. Variations in melting dynamics and mantle compositions along the Eastern Volcanic Zone of the Gakkel Ridge: insights from olivine-hosted melt inclusions // Contributions to Mineralogy and Petrology. — 2014. — Vol. 167, no. 5. — P. 1–22. — HTTPS://DOI.ORG/10.1007/s00410-014-1005-7.
  52. Wiemer S., Wyss M. Minimum Magnitude of Completeness in Earthquake Catalogs: Examples from Alaska, the Western United States, and Japan // Bulletin of the Seismological Society of America. — 2000. — Vol. 90, no. 4. — P. 859–869. — HTTPS://DOI.ORG/10.1785/0119990114.

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