A vertically travelling PcP wave (P reflected once off the core-mantle boundary) is…
PHYSICS · Multi-part · Fermi University Physics · Earth, Climate & Energy Physics · The solid Earth: structure, fields and thermal history · Seismology, tectonics and geodynamics
The Solid Earth, Ch Rays and travel times: from arrivals to a layered planet
Problem
A vertically travelling PcP wave (P reflected once off the core-mantle boundary) is observed to have a two-way travel time of 8.60minutes. Model the mantle as a single layer with average P speed vP=11.5kms−1, and take the Earth's radius as a=6371km.
((a)) Find the depth to the core-mantle boundary implied by this time.
((b)) Find the core radius rc.