U.K. Quakes Likely Caused by Fracking
Two small earthquakes that shook the Lancashire coast of northwest England and the nearby city of Blackpool earlier this year were probably caused by hydraulic fracturing, or fracking—a shale gas extraction technique that was being used nearby to explore its shale gas wells—according to a report released today. The energy company Cuadrilla Resources had begun an experimental drilling operation half a kilometer from the quakes' epicenter in March.
Fracking has caused concerns in some countries over its potential health and environmental impact—critics accuse it of contaminating drinking water with gas and the chemicals used for extraction—and it is banned in some countries and some U.S. states. Cuadrilla's is the first fracking operation conducted in the United Kingdom.
After geologists pointed the finger at Cuadrilla as the possible cause of the quakes, it commissioned independent experts to prepare a report on the topic. Entitled Geomechanical Study of Bowland Shale Seismicity, it has concluded that it is "highly probable" that the quakes were triggered by Cuadrilla's fracking: high pressure injection of fluids into rocks in order to fracture them and release shale gas. But the quakes were a fluke, the report continues, as the geology of the region was highly unusual to begin with.