Word: dziewonski
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...Dziewonski was the first chair of IRIS, and was reelected to serve again in that capacity this year...
...hope to create, with increasing resolution, a map of the earth's interior," Dziewonski says. "To do this, we essentially have to observe how waves propagate through different parts of the earth...
...signal from an earthquake in China, for example, can travel through the center of the earth at up to 22,000 miles per hour and be felt on the other side of the earth within 20 minutes, according to Dziewonski. But he says that the signals will be slightly different in Paris, New York and Caracas. Analyzing these differences can shed light onto the composition of the earth's interior...
...think the variations in how the waves propagate in various places relates to the temperature within the earth," Dziewonski says...
...idea was to cover the world with a more or less evenly distributed network of some 128 stations...to study the earth's structure in three dimensions," Dziewonski says...