Founder: Northern (Arctic) Federal University named after M.V. Lomonosov

Editorial office address: Russian Federation, 163002, Arkhangelsk, Naberezhnaya Severnoy Dviny 17, office 1410a

Phone: (818-2) 21-61-00(15-33)
e-mail: l.zhgileva@narfu.ru
http://aer.narfu.ru/en/

16+

ABOUT

Impact of seasonal variations of ambient seismic noise level on the number of registered earthquakes in the Arctic regions. P. 123–128

Версия для печати

Section: Geosciences

UDC

550.34

DOI

10.3897/issn2541-8416.2019.19.3.123

Authors

ER Morozova1, AP Turova1
1 N. Laverov Federal Center for Integrated Arctic Research of the Russian Academy of Sciences (Arkhangelsk, Russian Federation)
Corresponding author: Ekaterina Morozova (katyasims10@yandex.ru)

Abstract

Researchers at the Seismological Laboratory of the Institute of Geodynamics and Geology of the Federal Center for Integrated Arctic Research of the Russian Academy of Sciences (FCIARctic) have been engaged in the seismological monitoring of the European Arctic sector since 2011. In this paper, we present a comparative assessment of the earthquakes spatial distribution in this region based on the data from the International Seismological Centre (ISC) and the FCIARctic’s Arkhangelsk Seismic Network (ASN) obtained in 2012– 2016. The paper presents the waveforms of earthquakes occurred at the Gakkel Ridge and the Svalbard archipelago processed with the use of a Russian software package WSG (Windows Seismic Grafer) recommended by the Unified Geophysical Service of the Russian Academy of Sciences. A standard 4–8 Hz bandpass filter was used for the processing of regional Arctic earthquakes. The impact of seasonal variations on the quality of earthquakes registration was analysed based on the seismograms recorded by the ASN’s island-based Arctic stations from 2012 to 2014 The same analysis was done for the central broadband sensor SPA0 of the Norwegian NORSAR-owned SPITS group installed at the Svalbard archipelago. A correlation has been established between the number of earthquakes recorded by the ASN’s island Arctic stations and SPA0 station. The number of regional earthquakes, recorded by ASN’s island Arctic stations is is smaller in summer-autumn periods than in winter periods. Forthe SPA0 station, which is part of SPITS group, there is not seasonality in the number of registered earthquakes. Generally, earthquakes are recorded uniformly, exception on January. This might be due to the increased seismic activity in the Svalbard archipelago during that period.

Keywords

Svalbard archipelago, seismic station, earthquakes, seismological monitoring
Download (pdf, 1.5MB )

References

  1. Antonovskaya GN, Kovalev SM, Konechnaya YV, Smirnov VN, Danilov AV (2018) New information on the seismicity of the Russian Arctic according to the Severnaya Zemlya seismic observation point. Problems of the Arctic and Antarctic 64(2): 170–181. https://doi.org/10.30758/0555-2648-2018-64-2-170-181
  2. Arkhangelsk Seismic Network (2019) “Arkhangelsk Seismic Network”. http://fciarctic.ru/index.php?page=geoss [Electronic resource] [Accessed 19.05.2019]
  3. Asming VE, Baranov SV, Vinogradov AN, Vinogradov YuA (2009) Seasonal nature of seismicity in the Spitsbergen archipelago. Vestnik MGTU 12(4): 571–575.
  4. Danilov AV, Antonovskaya GN, Konechnaya YaV (2013) Features of the installation of registration points for seismic events in the Arctic region of Russia. Seismic instruments 49(3): 5–24.
  5. Frantsuzova VI, Ivanova EV, Konechnaya YV (2014) Seasonal variations in the registration of seismic events by the polar stations of the Arkhangelsk network. Modern methods of processing and interpretation of seismological data. In: Malovichko AA (Ed.) Materials of the 9th International Seismological School. Obninsk: GS RAS, 332–335.
  6. International Registry of Seismograph Stations (2019) International Registry of Seismograph Stations. http://www.isc.ac.uk/cgi-bin/stations?stacode=SPITS [Electronic resource] [Accessed 19.05.2019]
  7. International Seismological Centre (2019) International Seismological Centre. http://www.isc.ac.uk/ [Electronic resource] [Accessed 19.05.2019]
  8. Poigina SG, Krasilov SA (2019) The functionality of the WSG software. [Electronic resource; Accessed C:\Program Files\ WSG\DOC\WSG_Functions.doc (27.06.2019)]
  9. Sorokhtin NO, Nikiforov SL, Koshel SM, Kozlov NE (2016) Geodynamic evolution and morphostructural analysis of the western part of the Russian Arctic shelf. Vestnik MGTU 19(1): 123–137. https://doi.org/10.21443/1560-9278-2016-1/1-123-137
  10. Spivak AA, Kishkina SB (2004) Investigation of the microseismic background to determine active tectonic structures and geodynamic characteristics of a medium. Physics of the Earth 7: 35–49.
  11. Verba ML (2019) Modern bilateral stretching of the earth’s crust in the Barents-Kara region and its role in assessing the prospects of oil and gas. Oil and gas geology. Theory and practice 2. http://www.ngtp.ru/rub/4/026.pdf [Electronic resource] [Accessed 26.06.2019)]