The Times of pP, sS, sP and pS*
Harold Jeffreys, Michael Shimshonif · Geophysical Journal of the Royal Astronomical Society · 2007
Times of pP, sS, sP and pS, based on the Jeffreys-Bullen Tables of P and S are computed. Tables are given of the differences pP-P, sS-S, sP-P, pP-S and of the “depth allowances” for each of the four phases.