Oklahoma now has more earthquakes than California.
Geologists blame fracking.
Hydraulic fracturing for oil and natural gas involves drilling a vertical well and a horizontal tunnel through layers of shale, then setting off explosives at the end of the tunnel to fracture the shale. Liquids are pumped into the fractures to force out the oil and gas.
Geologists say the problem is not the fracturing, but that the liquids used in fracturing lubricate existing faults and allow them to shift more easily.
A disaster waiting to happen in Oklahoma? The link between fracking and earthquakes in an oil-rich town by Andrew Dewson for The Independent.
The Link Between Fracking and Oklahoma’s Quakes Keeps Getting Stronger by Tim McDonnell for Mother Jones.