A test of new Earth models against PcP and PmKP travel times

Details A test of new Earth models against PcP and PmKP travel times A test of new Earth models against PcP and PmKP travel times

Jun 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976pepi...11p..13b&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 11, Issue 4, p. P13-P17.

Physics

Scientific paper

PcP and PmKP travel times are computed for three simple or parametric Earth models, based on free-oscillation and travel-time data B1, PEM-A and HB1 and compared with PcP and PmKP travel times from different sources. This comparison is made only for the region above and below the core-mantle boundary and is of interest because of the current search for a standard Earth model. The comparison shows that only model B1 does not need a correction for its sPcP travel times. For the PmKP travel times for the three models, corrections of the form Δt = a + bm were obtained. The models need the following corrections for b: -1.3 for B1, 2.8 for sHB1 and 0.6 for PEM-A. The corrections a are shown to be equal to the observed corrections for PcP at large epicentral distances. The inversions of free-oscillation data to obtain Earth models are most successful when body-wave phases that interact with the core are included.

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