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<p>The Traffic Light System for monitoring induced seismicity was introduced after
consideration of advice from three scientists, following operations at Cuadrilla’s
Preese Hall site in 2011. The level of magnitude 0.5 at which operators must pause
operations, was set in consultation with industry as an appropriate precautionary
measure. These regulations have been working as intended and there are no plans to
review the traffic light system.</p><p> </p><p>Three seismic events, equal or greater
than magnitude 0.5, were recorded during pumping operations at Preston New Road between
October and December 2018. Following these red traffic light events the operator temporarily
paused operations, reduced pressure and monitored for any further seismic events.</p>
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