Fracking at the Preston New Road site in Lancashire has been suspended temporarily after a 1.55 magnitude quake was detected last night.
The minor earthquake, which is the biggest one recorded at the site yet, comes just a week after the process was resumed again following months of suspension because of a spate of seismic events.
Most people who live near the site would not have sensed last night's movement, which the company say would have felt similar to someone dropping a large bag of shopping on the floor.
What is fracking?
Fracking involves drilling into the ground and pumping in water and chemicals to release gas. At the moment, it must be halted if tremors measuring 0.5ML on the Richter scale are detected - a threshold the company calls "uniquely low".
In a statement following last night's seismic activity, a spokesperson said:
Cuadrilla recently announced it's pumped 16- million pounds directly into the Lancashire economy, through employing local people directly and working with local businesses and organisations.