Seismic measurements made by H.M.S Challenger in the Atlantic, Pacific and Indian Oceans and in the Mediterranean Sea, 1950-53

H.M.S. Challenger made a round-the-world cruise during 1950-52, during which studies were made of the deep oceans. In 1953 this work was continued in the north east Atlantic. The seismic experiments which formed part of this oceanographic work are here described. Results are given for the geological structure, as interpreted from seismic refraction, and from some reflexion observations, for the North Atlantic, Pacific and Indian Oceans and for the Mediterranean Sea. A full discussion is given of the methods of analyzing the refracted wave arrivals observed in deepwater seismic experiments.