Abstract
The pressure waves produced by the nuclear explosion at Novaya Zemlya, the Arctic, on Oct. 30, 1961 were recorded in a number of microbarographs and barographs in Japan. Three kinds of pressure wave trains were detected, viz., the first train through the shortest distance, the second one through an antipodal course and the third one that is nothing but the return of the first train after a complete global passage. Energetically it will be the second largest explosion subsequent to the Krakatoa eruption in 1883, taking the records of pressure waves into consideration.
The propagation velocities and the velocity-period relationship for the trains of the waves are examined, and the energy of the explosion is roughly estimated.
