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What’s causing hundreds of Oklahoma earthquakes? Al investigates

In the last six months, no state has experienced more significant earthquakes than Oklahoma. Scientific evidence suggests that the seismic activity could be because of changes in oil drilling. TODAY’s Al Roker reports.

In the last six months, no state has experienced more significant earthquakes than Oklahoma. Scientific evidence suggests that the seismic activity could be because of changes in oil drilling. TODAY’s Al Roker reports.