Word: seismic
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Dates: during 1980-1989
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Before dealing with the core, though, scientists had to understand the intervening mantle, through which all seismic information has to pass on its way to the surface. Explains Dziewonski: "If it's a faulty lens, you're going to have a wrong image." By 1984 the Harvard group had assembled the first detailed map of the mantle ever published. Their data consisted of the patterns of earthquake-generated pressure waves that passed through the solid earth, moving faster through cooler regions of the mantle and more slowly through warmer areas...
...seismic clash between cocky, contentious Joe Clark of Eastside High and the Paterson, N. J., school board has catapulted a back- burner conversation among academics about the quality of urban schools into front- page and prime- time news. President Reagan says Clark has the right stuff. Most educators, however, believe the bat- toting principal swings too hard. See EDUCATION...
Glasnost is nice, but it takes a vast network of satellites, ground stations and seismic detectors to make the world safe for arms control...
...SEISMIC DETECTORS. The U.S. has set up a worldwide network of seismic detectors, like those used to measure earthquakes, that can gauge the explosive force of large underground nuclear tests in the Soviet Union. Later this month an American science team will travel to Moscow to begin working out an agreement under which the U.S. could install a more accurate detection , device near the test sites. The new system, called Corrtex, would allow the U.S. to measure nuclear blasts that are too small to be clearly identified from seismic data alone...
Tensions between the two NATO allies abated, at least temporarily, when the Sismik 1 began seismic tests in Turkish waters. A spokesman in Ankara said that "as long as Greece stays within the six-mile territorial waters limit in its oil research, we will do the same." Greek Prime Minister Andreas Papandreou pronounced his outlook on the squabble as one of "restrained optimism...