The New York Times

Scientists Find Evidence of Solid Earth Core - New York Times

The New York Times | December 15, 1998 | Copyright
Inside a liquid core, the center of the earth is solid, scientists reported here at a meeting of the American Geophysical Union last week, providing the first direct evidence to support a long-held theory. The finding, long hinted at but never proved, came from an analysis of seismic waves generated by a powerful earthquake in June 1996 about 360 miles below Indonesia.Emile Okal, a professor of geological sciences at Northwestern University who was an author of the study, said scientists had known for some time that the earth was composed of a rocky mantle floating on a liquid core of molten…

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