Fracking tremors increase in severity, operations halted again

Two tremors at Cuadrilla’s fracking site in Lancashire have flagged up as a ‘red incidents’ on the Oil and Gas Authority’s (OGA) traffic light system

Cuadrilla Resources' Preston New Road fracking site
Cuadrilla Resources' Preston New Road fracking site before fracking commenced

Two tremors at Cuadrilla’s fracking site in Lancashire have flagged up as a ‘red incidents’ on the Oil and Gas Authority’s (OGA) traffic light system.

Under the system, if seismic activity registers on or above 0.5 on the local magnitude (ML) scale then fracking operators must immediately suspend injection, reduce pressure and monitor seismicity for any further “trailing events”. The “location and mechanism must be determined” to see whether the seismicity is natural or related to fracking operations, according to the rules.

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