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Inner core attenuation observed at Polish broadband stations

Autorzy
Identyfikatory
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The amplitude spectral ratio of PKPdf and PKPbc phases recorded at Pol-ish stations from some strong deep Kermadec/Fiji earthquakes is used to derive the attenuation at the top of the inner core. The derived mean value of QP is 314š46 (95% confidence level) and the maximum depth of penetration of the PKPdf phase into the inner core is roughly 341 km. The sampled region of the inner core is centered beneath the Kuril Islands and North East of Japan.
Rocznik
Strony
231--238
Opis fizyczny
Bibliogr. 11 poz.
Twórcy
autor
  • Department of Geophysics, University of Bucharest, 6 Traian Vuia str., 70138 Bucharest o.p. 37, Romania
autor
  • Institute of Geophysics, Polish Academy of Sciences ul. Księcia Janusza 64, 01-452 Warszawa, Poland
Bibliografia
  • Bhattacharyya, J., P. Shearer and G. Master, 1993, Inner core attenuation from short period PKP(BC) versus PKP(DF) waveforms, Geophys. J. Int. 114, 1-11.
  • Bowers, D., D.A. McCormack and D.S. Sharrock, 2000, Observations of PKP(DF) and PKP(BC) across the United Kingdom: implications for studies of attenuation in the Earth's core, Geophys. J. Int. 140, 374-384.
  • Cormier, V.F., 1981, Short-period PKP phases and the anelastic mechanism of the inner core, Phys. Earth Planet. Inter. 24, 291-301.
  • Helffrich, G., S. Kaneshima and J.-M. Kendall, 2002, A local, crossing-path study of attenuation and anisotropy of the inner core, Geophys. Res. Lett. 29, 1568-1572.
  • Kennett, B.L.N., E.R. Engdahl and R. Buland, 1995, Constraints on seismic velocities in the Earth from travel times, Geophys. J. Int. 122, 108-124.
  • Niazi, M., and L.R. Johnson, 1992, Q in the inner core, Phys. Earth Planet Inter. 74, 55-62.
  • Roth, E.G., D.A. Wiens, L.M. Dorman, J. Hildebrand and S.C. Webb, 1999, Seismic attenua-tion tomography of the Tonga-Fiji region using phase pair methods, J. Geophys. Res. 104, 4795-4809.
  • Souriau, A., and P. Roudil, 1995, Attenuation in the uppermost inner core from broad-band GEOSCOPE PKP data. Geophys. J. Int. 123, 572-587.
  • Souriau, A., R. Garcia and G. Poupinet, 2003, The seismological picture of the inner core: structure and rotation, C.R. Geoscience 335, 51-63.
  • Steam, S.D., 1975, Digital Signal Analysis, Hayden Book Co. Inc., New Jersey.
  • Tseng, T.L., B.S. Huang and B.H. Chin, 2001, Depth-dependent attenuation in the uppermost inner core from the Taiwan short period seismic array PKP data, Geophys. Res. Lett. 28, 459-462.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BSL7-0009-0031
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