UK firm says shale fracking caused tremors

FRACKING+SHALE+GAS UK firm says shale fracking caused tremors

By Oleg Vukmanovic, Reuters

UK shale gas firm Cuadrilla Resources on Wednesday said exploration work triggered small tremors at its drill site near Blackpool in northwest England earlier this year, as activists scaled a rig protesting against its gas recovery methods.

“It is highly probable that the hydraulic fracturing of Cuadrilla’s Preese Hall-1 well did trigger a number of minor seismic events,” a report commissioned by the company said.

A spokesman later confirmed the tremors were triggered by pumping vast quantities of water at high pressure 3 kilometres underground through drill holes in a process known as hydraulic fracturing, or fracking, which is designed to prop open shale rocks and release trapped gas.

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