We knew that the explosion would, if it succeeded, develop pressure so great that none of us on any of the little islands could possibly survive it. I was actually on a battle cruiser about thirty miles away when it went off. We've all read the descriptions of such a thing, but I hadn't realized what a slow motion picture it would be. Black cloud opening up, this blaze of light from the center. And then that blaze of light gradually being covered over by the debris from the little island and all this going up into the sky I came to realize, though, that even the energy of an H-bomb, huge as it is, is less than the energy of a hurricane or an earthquake, the Earth is still ahead of us. That island, on which the 60 tons of equipment had gone off, called Elugelab, disappeared in the explosion. Of course, its top was cut off so it's really down underwater now. Edward Teller did not go out to the shot. He was smart enough to realize that the earthquake, if there was one, and if the shot was successful, would go through the Earth, and he could pick it up on a seismograph nearby, where he was, in California. And sure enough, the signal came through and he could report success to Los Alamos sooner than it could hear that news by the normal channels.