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- W2059616637 abstract "Abstract Short period recordings of PcP at the SRO station ANTO have been observed at epicentral distance of 13.5° from presumed underground explosions in western Kazahk, USSR. The core reflections are narrow band (0.6 to 2.4 Hz), short duration (3 sec) signals. Comparison of these near normally incident reflections to P waveforms observed at greater distances reveals that the PcP spectra are peaked with respect to the more representative P-wave spectra. The 1.2 Hz spectral peak is also observed for PcP waves recorded at 50 degrees. Corrections for frequency independent mantle Q attnuation models only increase the high frequency deficiency of the PcP spectra at frequencies above 1.2 Hz. A plausible explanation calls for finer structural features of core-mantle boundary (CMB) than hitherto suggested. The influence of small scale lateral heterogeneities, however, cannot be completely ruled out. (Mantle-core boundary, near normal PcP reflection.)" @default.
- W2059616637 created "2016-06-24" @default.
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- W2059616637 date "1987-10-01" @default.
- W2059616637 modified "2023-09-26" @default.
- W2059616637 title "Observations of explosion generated PcP spectra at near-normal incidence" @default.
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- W2059616637 doi "https://doi.org/10.1016/0264-3707(87)90055-x" @default.
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