P wave tomography of the Earth's lowermost mantle

Models (a) TRH_KC and (b) TRH_KCa, for the optimal damping. These one layered models represent P velocity perturbations with respect to model ak135 (Kennett et al., 1995) in the bottom 300 km of the mantle. TRH_KC was obtained by inverting PKP(AB-DF) and PcP-P data simultaneously, without inner core anisotropy. For TRH_KCa, the same dataset was inverted, but first corrected for the transverse anisotropy model of the inner core by Tromp (1995) . Blackened areas represent non-sampled regions.

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This is an electronic version of an article published in Geophysical Journal International:

H. Tkalcic, B. Romanowicz and N. Houy,
Constraints on D" structure using PKP(AB-DF), PKP(BC-DF) and PcP-P
travel time data from broadband records, Geophys. J. Int., 149(3), 599-616, 2002.

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