Seismological and Related Aspects of the 1954 Hydrogen Bomb Explosions

Abstract

Seismic data, recorded in the regular way, from four American hydrogen bomb explosions of 1954, indicate that the origin-times of the explosions were, in G.M,T. : (i) Feb. 28 days 18 hr 45 min 0 sec, (ii) Mar. 26 days 18 hr 30 min 0 sec, (iii) Apr. 25 days 18 hr 10 min 0 sec, (iv) May 4 days 18 hr 10 min 0 sec. If these surmised times are correct, and if the assumed source-point is correct, the results show that the seismic travel-times from Bikini in all azimuths need reductions of the order of 1?2 sec (possibly more) from the standard travel-times.