Physics
Scientific paper
Oct 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986georl..13.1011s&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 13, Oct. 1986, p. 1011-1014. Research supported by the Institut National des
Physics
8
Broadband, Discontinuity, Earth Mantle, Earth Planetary Structure, Seismology, Earthquakes, P Waves, Polarization (Waves), S Waves
Scientific paper
Examples of the first analyses of broadband Geoscope data at station SSB (France) show that these data will make possible a detailed study of the deep mantle discontinuities. Analysis of the P-coda of earthquakes using specific methods suggests the existence of P-to-S conversions at 670 km depth beneath SSB for earthquakes with northern-to-eastern azimuths; a comparison with results from the NARS and Grafenberg arrays indicates that the 670-km discontinuity beneath western Europe is highly heterogeneous or horizontally discontinuous. A frequency analysis reveals that the relevant discontinuity is not very sharp.
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