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Cumulative number of earthquakes with a magnitude of 3.0 or larger in the central and eastern United States, 1973-2014

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Cumulative number of earthquakes with a magnitude of 3.0 or larger in the central and eastern United States, 1973-2014
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Cumulative number of earthquakes with a magnitude of 3.0 or larger in the central and eastern United States, 1973-2014. The rate of earthquakes began to increase starting around 2009 and accelerated in 2013-2014.

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