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Fracking industry to use traffic light system to avoid quakes

The Government is to implement a traffic light system to gauge the risks of seismic activity resulting from fracking.

The system will require operators to stop if seismic activity reaches magnitude 0.5, which could not be felt at the surface but is higher than normal.

Cuadrilla Resources suspended its fracking activities at four sites near Blackpool, Lancashire following two minor tremors in April and May 2011.