Short-period body wave constraints on properties of the earth's inner core boundary

Details Short-period body wave constraints on properties of the earth's inner core boundary Short-period body wave constraints on properties of the earth's inner core boundary

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93.9058c&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 93, Aug. 10, 1988, p. 9058-9074. Research supported by the Lawrence Liver

Physics

26

Earth Core, Ocean Models, Seismology, Constraints, Pacific Ocean, Velocity Distribution

Scientific paper

Short-period waveform data were modeled in an attempt to constrain the P and S velocity structure at the earth's inner core boundary (ICB). The data set consists of recordings from 10 events in the South Pacific, and the data selection criteria as well as the methods of analysis are designed to avoid problems with receiver response. These data are modeled using a calculation technique that facilitates the consideration of a wide variety of models for the ICB. Results suggest that Q(alpha) in the inner core has the frequency dependence proposed by Doornbos (1983). The data determine the P velocities above and below the ICB to within a trade-off that is well constrained by the data. For example, with a P velocity structure above the ICB given by the PREM, the P velocity below the ICB is 11.03 + or - 0.03km/sec.

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