Fracking can be extended throughout UK, even though it caused two earthquakes

Drilling method can be extended throughout UK, say experts, even though it has caused two earthquakes by Fiona Harvey, April 17, 2012, The Guardian
The government’s own data revealed serious questions around the safety of fracking in areas of known seismic activity, such as the two wells in Lancashire, because of evidence that the resulting earthquakes have damaged the integrity of at least one well. … The report, titled Preese Hall Shale Gas Fracturing: Review and Recommendations for Induced Seismic Mitigation, concluded that both earthquakes were related to the drilling. The report also revealed another concern – instruments showed the second tremor had caused “deformation” to the structure of the well. This is of concern because if the integrity of a well is compromised, it could cause future problems with leakage and contamination, and raises longer term concerns about the design and viability of such wells, according to Mike Hill, an industry expert. He is worried that the monitoring of the cement casings for the fracking wells is inadequate, as officials have been unable to provide detailed information on their monitoring. [Emphasis added]

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