Word: underground
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Dates: during 1960-1969
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...major difficulty confronting Project Vela was distinguishing the seismic waves caused by underground nuclear explosions from those of earthquakes. Leet was confident that a solution to this problem could be found "with proper instrumentation and research. No adequate scientific inquiry into the entire area of underground nuclear test detection has yet been made...
...should be ready to accept a treaty banning above ground tests and underground tests which exceed a threshold detectable by existing systems. It follows that the U.S. should be willing to rely on existing detection systems which are admittedly capable of placing any Soviet atmospheric tests, and large underground blasts...
...Conduct "effects tests" to discover how well the Minuteman can ride out a nuclear attack in its "hardened," underground silo. Other tests will seek to determine how well the hulls of submarines-including the subs that carry the Polaris missile-will stand up to nuclear attack. Nuclear weapons will be detonated at high altitudes to check the effect on ground communications and radar. In previous tests, ionization caused by nuclear explosions wreaked havoc with electronics gear, raised the possibility that an enemy might try to knock out the electronic network of U.S. defenses by exploding warheads at high altitudes...
...poems celebrate the spiritual experience in a natural metaphor, as a sort of vegetation mystery. Cuttings is characteristic: This urge, wrestle, resurrection of dry sticks, Cut stems struggling to put down feet, What saint strained so much, Rose on such lopped limbs to a new life? I can hear, underground, that sucking and sobbing, In my veins, in my bones I feel it,- The small waters seeping upward, The tight grains parting at last...
...underground nuclear tests may not produce a fiery mushroom cloud but there is one above-ground effect that anyone can see. ] Shortly after each recent blast, a strange dent has appeared in the ground at the Yucca Flats, Nev., test center. Some of the depressions are only a few feet deep, but two of them are 50 ft. deep and several hundred feet across. The holes are not craters; nothing is blown out. There is no radioactivitiy, and the level of the ground around the depressions is not raised. But millions of cubic feet of dirt have apparently disappeared...