Soviet Seismic Studies of the Earth's Crust in the Pacific Ocean During the International Upper Mantle Project-A Summary
Abstract Kosminskaya, LP., Zverev, S.M. and Udintsev, G.B., 1973. Soviet seismic studies of the earth's crust in the Pacific Ocean during the International Upper Mantle Project — a summary. In: S. Mueller (Editor), The Structure of the Earth's Crust, based on Seismic Data. Tectonophysics , 20 (1–4): 147–151. The main results of seismic investigations in the transition zone from the Asian continent to the Pacific Ocean and in several regions of the Pacific Ocean are reported briefly. One of the most surprising findings is the existence of a layer with a P-velocity of 9 km/sec only 12–15 km below the oceanic crust-mantle boundary. Some recommendations for future investigations are given.