Travel Time Curves of Seismic Waves from Underground Explosions on Amchitka Island

The paper presents the parameters of seismic wave travel times for three artificially induced events obtained from the archive of the Institute of Geosphere Dynamics (IDG RAS). For the study, we chose underground nuclear tests (Long Shot, Milrow, and Cannikin) with magnitudes 6.1 < mb < 6.8 conducted by the United States of America from 1965 to 1971 on Amchitka Island in the Aleutian Arc. The study contains the results of observations obtained with various types of seismic channels. Travel time curves were constructed, and the linear functions of body wave propagation were obtained for epicentral distances of Δ ~ 8°–85° and ~134°–160°. The integral velocity of the Earth’s upper mantle and outer core is estimated. The wave travel times are intended for further research of seismic waves from shallow artificially induced sources (701–1791 m) and for refining the Earth’s structure.