Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników
Tytuł artykułu

Spectral characteristics of natural and artificial seismic events in the Lop Nor test site, China

Warianty tytułu
Języki publikacji
Seismic discriminants based on the spectral seismogram and spectral magnitude techniques have been tested to discriminate between three events; a nuclear explosion which took place in Lop Nor, China with mb 6.1 and two earthquakes from the closest area with mb 5.5 and 5.3, respectively. The spectral seismogram of the three events shows that the frequency content of the nuclear explosion differs from that of the earthquakes where the P wave is richier in high frequency content in the nuclear explosion than the corresponding earthquakes. It is also observed that the energy decays more rapidly for the nuclear explosion than for the earthquakes. Furthermore, the spectral magnitudes reveal significant differences in the spectra between the nuclear explosion and the two earthquakes. The observed differences appear to be quite enough to provide a reliable discriminant. The estimated stress drop from the magnitude spectra indicates a higher stress drop of the nuclear explosion relative to the earthquakes of the same tectonic region.
Opis fizyczny
  • Abou Elenean, K., H. Hussein, A. Abu El-Ata, and E. Ibrahim (2000), Seismological aspects of the Cairo earthquake 12th October 1992, Ann. Geofis. 143, 485-503.
  • Basham, W., and O. Dahlman (1988), International seismological verification. In: J. Goldbaltt and D. Cox (eds.), Nuclear Weapon Testes: Prohibition or limitation, Oxford University Press, New York, 169-189.
  • Boore, D.M., and J. Boatwright (1984), Average body-wave radiation coefficients, Bull. Seism. Soc. Am. 94, 1615-1621.
  • Borman, P., K. Klinge, and S. Wendt (2002), Data analysis and seismogram interpretation. In: P. Borman (ed.), IASPI New Manual of Seismological Observatory Practice (NMSOP), GeoForschungZentrum, Potsdam, vol. 1, ch. 11, 100 pp.
  • Brune, J. (1970), Tectonic stress and the spectra of seismic shear waves from earthquakes, J. Geophys. Res. 75, 4997-5009.
  • Bukchin, B., A. Mostinsky, A. Egorkin, A. Levshin, and M. Ritzwoller (2001), Isotropic and non-isotropic components of the earthquakes and nuclear explosions on the Lop Nor test site, China, Pure and Appl. Geophys. 158, 1497-1515.
  • Chernobay, I.P., and I.P. Gabsatarova (1999), Source classification in northern Caucasus, Phys. Earth Planet. Int. 113, 183-201.
  • Denny, M.D., S.R. Taylor, and E.S. Vergino (1987), Investigation of mb and Ms formulas for the Western United States and their impact on the Ms:mb discriminant, Bull. Seism. Soc. Am. 77, 987-995.
  • Dreger, D., and B. Woods (2002), Regional distance seismic moment tensor of nuclear explosions, Tectonophysics 356, 139-156.
  • Duda, S.J., and T.B. Yanovskaya (1994), Calibrating functions for P-wave spectral magnitudes, Acta Geophys. Pol. 42, 4, 293-306.
  • Farnbach, J. (1975), The complex envelope in seismic signal analysis, Bull. Seism. Soc. Am. 65, 951-962.
  • Fasthoff, S., and G. Lucan (1996), Introduction to spectral seismograms, Institute of Geophysics, Hamburg University, Hamburg (unpublished paper).
  • Gabor, D. (1946), Theory of communication, J. Inst. Electr. Eng. III, 93,429-457.
  • Huerta-López, C.I., J. Pulliam, K.H. Stokoe, J.M. Roësset, C. Valle-Molina (2003), Spectral characteristics of earthquakes recorded on the Gulf of México seafloor and soft sediment characterization, ASME invited lecture at the Offshore Geotechnics Workshop of the 22nd Offshore Mechanics and Arctic Engineering International Conference 06/2003, Proc. 22nd Offshore Mechanics and Arctic Engineering 2003 Intern. Conf., paper No. 37504, 1-9.
  • Hussein, H.M., K.M. Abou Elenean, E.M. Ibrahim, S. Ahmed Abou El Atta, and S.J. Duda (1998), Spectral magnitudes and source parameters for some damaging earthquakes in Egypt, Bull. IISEE 32, 1-16.
  • Kaiser, D., and S.J. Duda (1988), Magnitude spectra and other source parameters for some major 1985 and 1986 earthquakes, Tectonophysics 152, 303-318.
  • Kaiser, D., S.J. Duda, and D.K. Chowdhury (1996), P-wave magnitude spectra, stress drop, rupture complexities and other source parameters from broadband seismograms of three 1987 Southern California earthquakes, Geofizika 13, 1-29.
  • Levshin, A.L., V.F. Pisarenko, and G.A. Pogrebinsky (1972), On a frequency-time analysis of oscillations, Ann. Geophys. 28, 211-218.
  • Lyskova, E.L., T.B. Yanovskaya, and S.J. Duda (1998), Spectral characteristics of earthquakes along plate boundaries, Geofizika 15, 69-81.
  • Nortmann, R., and S.J. Duda (1982b), Calibration functions for P- and SH-waves tables, Institute of Geophysics, Hamburg University, Hamburg.
  • Patton, H.J. (1991), Seismic moment estimation and the scaling of the long-period explosion source spectrum. In: S.R. Taylor, H.J. Patton, and P.G. Richards (eds.), Explosion Source Phenomenology, Geophysical Monograph, Am. Geophys. Union, Washington, 65, 171-183.
  • Roslov, Yu.V. (1994), Program for amplitude spectra treatment and analysis, Acta Geophys. Pol. 42, 4, 315-319.
  • Saul, J. (1995), A computer program (nfilter) for spectral seismogram calculation, Institute of Geophysics, Hamburg University, Hamburg.
  • Stevens, J.L. (1986), Estimation of scalar moments from explosion-generated surface waves, Bull. Seismol. Soc. Am. 76, 123-151.
  • Taylor, S.R., M.D. Denny, E.S. Vergino, and R.E. Glaser (1989), Regional discrimination between NTS explosions and western U.S. earthquakes, Bull. Seism. Soc. Am. 79, 1142-1176.
  • Wallace, T.C. (1991), Body wave observations of tectonic release. In: S.R. Taylor, H.J. Patton, and P.G. Richards (eds.), Explosion Source Phenomenology, Am. Geophys. Union, Washington 65, 161-170.
  • Woods, B., S. Kedar, and D. Helmberger (1993), ML:M0 as a regional seismic discriminant, Bull. Seism. Soc. Am. 83, 1167-1183.
Typ dokumentu
Identyfikator YADDA
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.