Sep 8, 2017 — The most powerful quake was the 9.5-magnitude Valdivia Earthquake that struck in Chile in 1960, according to the U.S. Geological Survey (USGS) ...
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biggest earthquakes
Major Earthquakes in Virginia. Adapted from. Seismicity of the United States, 1568-1989. Carl W. Stover and Jerry L. Coffman, 1993, USGS Professional Paper ... 3925e8d270
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