Why is Oklahoma experiencing more earthquakes than California?

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US-Energy-Gas-Environment A Consol Energy Horizontal Gas Drilling Rig explores the Marcellus Shale outside the town of Waynesburg, PA on April 13, 2012. (MLADEN ANTONOV/AFP/Getty Images)

Rall Walsh is a 5th year Ph.D. candidate in the Geomechanics research group of the Stanford Department of Geophysics and is currently researching man-made earthquakes in the mid-continental United States, and how to prevent them. Rall joins Roe Conn and Anna Davlantes to explain why Oklahoma is experiencing more earthquakes annually than California and how the process of disposing of wastewater from oil and gas drilling is likely causing this phenomenon.

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