Scientists Say 2011 Oklahoma Earthquake Linked to Injection Well

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From the Associated Press:
WASHINGTON (AP) — An unusual and widely felt 5.6-magnitude quake in Oklahoma in 2011 was probably caused when oil drilling waste was pushed deep underground, a team of university and federal scientists concluded.
That would make it the most powerful quake to be blamed on deep injections of wastewater, according to a study published Tuesday by the journal Geology. The waste was from traditional drilling, not from the hydraulic fracturing technique, or fracking.
Not everyone agrees, though, with the scientists' conclusion: Oklahoma's state seismologists say the quake was natural.
Read the whole article here. 

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