Man-Made Earthquakes on the Rise

The number of earthquakes in the central and eastern United States has increased dramatically over the past few years, and scientists think the reason could be due to the disposal of wastewater associated with oil and gas production.

According to a report by the U.S. Geological Survey, there were more than 300 earthquakes above magnitude 3.0 from 2010 to 2012. That’s a five-fold increase from earthquakes observed from 1967 to 2000, when the average number was 21 per year.

In 2011, a 5.6 …

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