Word: multimegaton
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Dates: during 1970-1979
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...Francisco, there is another locked section. Sooner or later, such segments will have to catch up with the inexorable-movement of the opposing plates. If they do so in one sudden jolt, the resulting earthquakes, probably in the 7-to 8-pt. Richter range and packing the energy of multimegaton hydrogen bombs, will cause widespread destruction in the surrounding areas...
...Atomic Energy Commission's announcement that it planned to test a multimegaton nuclear device under the Aleutian island of Amchitka last November touched off a shock wave of protest. Some critics charged that the explosion of an H-bomb in a region that was already known to be seismically active could trigger devastating quakes and the great sea waves, known as tsunamis, that often follow them. Environmentalists made dire predictions of a wildlife massacre. Nonetheless, the test took place, and it did not cause serious tremors or lasting environmental damage. Instead, after months of careful analysis, U.S. Government scientists...