Advertisement

Marine Geophysical Researches

, Volume 8, Issue 1, pp 39–47 | Cite as

Attenuation of seismic waves in the Jan Mayen island area

  • J. Havskov
  • L. B. Kvamme
  • H. Bungum
Article

Abstract

An analysis of the attenuation of seismic waves as measured by the quality factorQc (for coda waves) has been performed for the volcanic Jan Mayen island in the Norwegian Sea, using earthquakes near the Jan Mayen Fracture Zone and local seismic stations on the Jan Mayen island.Qc values of the order of 100 at a frequency of 1 Hz are found, increasing to about 300 at 10 Hz. These values are typical of what usually is observed in tectonically influenced areas near oceanic/continental plate boundaries. It is considered likely that these results are influenced by the fact that the Jan Mayen island, in spite of its proximity to a fracture zone, is located in the northern end of the Jan Mayen Ridge, which now is accepted as being a micro-continent. The presence of the active Beerenberg volcano on the Jan Mayen island does give rise to a somewhat stronger attenuation for waves traversing that area, but this effect is weak and quite limited in spatial extent. There is also a slight increase in attenuation as a function of depth, but less than what is observed in terms of lateral variations. This is reasonable in view of the very strong lateral variations in lithospheric structure exhibited in this area.

Keywords

Attenuation Lateral Variation Fracture Zone Spatial Extent Seismic Station 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Aki, K.: 1980, ‘Attenuation of Shear waves in the Lithosphere for Frequencies from 0.05 to 25 Hz’,Phys. Earth Planet. Int. 21, 50–60.CrossRefGoogle Scholar
  2. Aki, K.: 1981, ‘Attenuation and Scattering of Short-Period Seismic Waves in the Lithosphere’, in E. S. Husebye and S. Mykkeltveit,Identification of Seismic Sources — Earthquakes or Underground Explosion, D. Reidel Publ. Co., Dordrecht, The Netherlands.Google Scholar
  3. Aki, K. and Chouet B.: 1975, ‘Origin of Coda Waves: Source, Attenuation and Scattering Effects’,J. Geophys. Res. 80, 3322–3342.CrossRefGoogle Scholar
  4. Biswas, N. N. and Aki, K.: 1984, ‘Characteristics of Coda Waves: Central and Southcentral Alaska’,Bull. Seism. Soc. Am. 74, 493–507.Google Scholar
  5. Bungum, H. and Husebye, E. S.: 1977, ‘Seismicity of the Norwegian Sea: The Jan Mayen Fracture Zone’,Tectonophysics 40, 351–360.CrossRefGoogle Scholar
  6. Del Pezzo, E., Giarrusso, A., Ferulano, F., and Martini, M.: 1983, ‘Seismic CodaQ and Scaling Law of Source Spectra at the Aeolian Islands, Southern Italy’,Bull. Seism. Soc. Am.,73, 97–108.Google Scholar
  7. Eldholm, O., Sundvor, E., Myhre, A. M., and Faleide, J. L: 1984, ‘Cenozoic Evolution of the Continental Margin off Norway and Western Svalbard’, inPetroleum Geology of the North European Margin, Norwegian Petroleum Society (Graham & Trotman), pp. 3–18.Google Scholar
  8. Imsland, P.: 1978, ‘The Geology of the Volcanic Island Jan Mayen Arctic Ocean’, Thesis, Nordic Volcanological Institute, University of Iceland.Google Scholar
  9. Myhre, A. M., Eldholm, O. and Sundvor, E.: 1984, ‘The Jan Mayen Ridge: Present Status’,Polar Research 2 n.s., 47–59.Google Scholar
  10. Nuttli, O.: 1981, ‘The Earthquake Problem in the Eastern United States’, ASCE, J. Struct. Div. 108, 1302–1312.Google Scholar
  11. Perry, R. B., Fleming, H. S., Cherkis, N. Z., Feden, R. H., and Vogt, P. R.: 1980. ‘Bathymetry of the Norwegian-Greenland and Western Barents Seas’, Map, U.S. Naval Res. Lab., Washington D.C.Google Scholar
  12. Rautian, T. G. and Khalturin, V. I.: 1978, ‘The Use of Coda for Determination of Earthquake Source Spectrum’,Bull. Seism. Soc. Am. 68, 923–943.Google Scholar
  13. Roecker, S. W.: 1981, ‘Seismicity and Tectonics of the Pamir-Hindu Kush Region of Central Asia’, Ph.D. Thesis, Massachusetts Institute of Technology, Cambridge, Massachusetts.Google Scholar
  14. Rovelli, A.: 1982, ‘On the Frequency Dependence of Q in Foriuli from Short-Period Digital Records’, Bull. Seism. Soc. Am.,72, 2369–2372.Google Scholar
  15. Sato, H. and Matsumura, S.: 1980, ‘Q −1 Value forS Waves (2–32 Hz) under the Kanto District in Japan’,Zisin 33, 541–543.Google Scholar
  16. Singh, S.: 1981. ‘Regionalization of Crustal Q in the Continental United States’, Ph.D. Thesis, St. Louis University, St. Louis, Missouri.Google Scholar
  17. Singh, S. K., Aspel, R. J., Fried, J., and Brune J. N.: 1982, ‘Spectral Attenuation of SH Waves Along the Imperial Fault’, Bull. Seism. Soc. Am.,72, 2003–2016.Google Scholar
  18. Sylvester, A. G.: 1975, ‘History and Surveillance of Volcanic Activity on Jan Mayen Island’, Bull. Volcanol.79(2), 1–23.Google Scholar
  19. Sørnes, A. and Fjeldskaar, W.: 1980, ‘The Local Seismicity in the Jan Mayen Area’,Norsk Polarinstitutt Skrifter 172, 21–32.Google Scholar
  20. Sørnes, A. and Navrestad, T.: (1975), ‘Seismic Survey of Jan Mayer’,Norsk Polarinstitutt Årbok 1975, pp. 37–52.Google Scholar
  21. Talwani, M. and Eldholm, O.: 1977, ‘Evolution of the Norwegian-Greenland Sea’,Geol. Soc. Am. Bull. 88, 969–999.CrossRefGoogle Scholar
  22. Wilson, J. T.: 1973, ‘Mantle Plumes and Plate Motions’,Tectonophysics 19, 149–164.CrossRefGoogle Scholar

Copyright information

© D. Reidel Publishing Company 1986

Authors and Affiliations

  • J. Havskov
    • 1
  • L. B. Kvamme
    • 1
  • H. Bungum
    • 1
  1. 1.Seismological ObservatoryBergen Norway

Personalised recommendations