"The British Geological Survey (BGS) records seismicity to one decimal place and therefore have recorded the event as 0.8ML (local magnitude)".
A spokeswoman for Cuadrilla said: "This is not a "red" incident under the traffic light system operated by the Oil and Gas Authority as we were not pumping fracturing liquid as part of our hydraulic fracturing operations at the time".
Its been classed as a "red event' and the energy company has paused operations for at least the next 18 hours as monitoring continues".
The quake, which measured 0.8 on the Richter Scale, is the thirteenth recorded by the British Geological Survey, and is the biggest one recorded in the area since fracking began last Monday.
The controversial fracking work began 11 days ago after an environmental campaigner failed in a High Court bid to block it.
Cuadrilla chief executive Francis Egan said people should not be concerned.Fracking in Lancashire was stopped in 2011 after being linked with earthqaukes.
The UK's Energy Minister Claire Perry had a private meeting with oil and gas firms in May, months before fracking resumed in the UK earlier this month for the first time in seven years, but she failed to record that meeting in a transparency register, The Guardian reported on Friday.
"This is deeply concerning for those living nearby and why the industry must be closely monitored".
Operations have been suspended at the UK's only active shale gas fracking site following an natural disaster - just 11 days after it was given the go ahead. Cuadrilla is planning to frack two wells at its Lancashire site, and then it aims to test to see if the gas flow is commercially viable.
The campaign to stop fracking could be boosted by the continued seismic activity.
"It's been caused by the hydraulic fracking", he said.
This sudden release of energy causes the seismic waves that make the ground shake, and in extreme cases can even split the Earth's crust up to its surface.
The water fractures the rocks, creating dozens of cracks through which gas and heat can escape to the surface.
There are questions over whether a magnitude 5.6 temblor that hit Oklahoma - the biggest quake ever recorded in the state - was caused by the controversial process.