Low P-wave velocity at the base of the mantle

Details Low P-wave velocity at the base of the mantle Low P-wave velocity at the base of the mantle

Sep 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20.1843g&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 17, p. 1843-1846.

Physics

36

Earth Mantle, P Waves, Seismographs, Velocity Distribution, Earth Core, Seismic Waves

Scientific paper

Anomalous differential times between LP SPdKS and SKS are presented for two different source-receiver geometries. The SPdKS-SKS times depend most strongly on V(P) at the base of the mantle near the SKS core entrance and exit locations. The anomalous times can be fit, on average, by models containing a 5 percent reduction in V(P) from PREM at the core-mantle boundary, distributed over 100 km.

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