There has been a second earthquake in Blackpool, close to the site where Cuadrilla have recommenced their fracking activities. As a precaution they have again called a temporary halt to drilling. The previous earthquake, at the beginning of April, had a similar seismic signature. Read the BBC news story here
Regarding the April 1st earthquake (no April fool joke!), the British Geological Survey site says
Any process that injects pressurised water into rocks at depth will cause the rock to fracture and possibly produce earthquakes.
It is well known that injection of water or other fluids during the oil extraction and geothermal engineering, such as Shale gas, processes can result in earthquake activity.
We are unable to conclusively say if the magnitude 2.3 ML earthquake that was related to ongoing hydrofracturing at the Preese Hall drill site.
Our epicentre places the earthquake approximately 2 km from the drill site, which falls within the area of error.
However, our depth of 3.6 km is poorly resolved as the nearest station is 80 km away from the epicentre. This means that the depth errors are large.
Instrumentation much closer to the site, as well as a detailed record of dates and times of injection are required to identify any relationship between the injection process and any seismic activity in future.
So the question to BGS is – is the instrumentation closer now?
The question to Cuadrilla is – have you released records of the dates and times of injection?
And the questions to Tim Yeo are –
are you SURE
There appears to be nothing inherently dangerous about the process of “fracking” itself …?
It’s not just air quality and water contamination that folks have reason to be concerned about, is it?
It would be interesting to know if there is a link, wouldn’t it?
Say NO to Shale Gas; or you may just feel the earth move