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quakes 7.0+ per decade | by Tony Kingdad
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quakes 7.0+ per decade

Chart of the number of earthquakes per decade since 1AD. Data from www.ngdc.noaa.gov/nndc/struts/form?t=101650&s=1&d=1 via this shortened URL query: j.mp/9kOWyK

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Taken on March 8, 2010