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...first, Western seismologists suspected that the change in velocity was peculiar to the geology of Central Asia: it seemed unlikely that the phenomenon could be used as a predicting tool in other quake-prone areas. Yash Aggarwal, a 30-year-old graduate student of Indian descent at Columbia University's Lamont-Doherty Geological Observatory, did not share the skepticism. As part of his doctoral work, he decided to study the seismic records of the swarms of microquakes that had occurred during 1971 in the Blue Mountain lake region of New York's Adirondack Mountains. Aggarwal's hunch...

Author: /time Magazine | Title: Science: The Telltale Waves | 2/12/1973 | See Source »

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