MENLO PARK, Calif. -- Oklahoma had more 3.0 to 4.0 earthquakes than California did last year. According to the U.S. Geological Survey, some of the central states have seen a dramatic increase in man-made quakes because of oil and gas production including fracking. Watch the video player above for Lyanne Melendez's full report.
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Feds: Risk of 2016 quake increases, especially in Oklahoma
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