By Tony Reid
A controversial gas extraction process has been identified as the probable cause of two small earthquakes in Britain.
Fracking, as it's commonly known, is used in many parts of the world including New Zealand.
Its technical name is ‘hydraulic fracturing’ – the process of pumping water, sand and chemicals underground at high pressure, forcing tiny gaps in the rock to expand. This releases gas, which travels up to the surface to be captured.
In the United States fracking is controversial, with claims that it leads to groundwater contamination. On one occasion a drilling mistake saw water contaminated with methane gas.
When the ground began to rumble in Lancashire in the UK where fracking was being carried out, the drilling company asked for a report.
The findings show the events were caused by fracking operations/
The findings have implications here in New Zealand – Shell, Greymouth Petroleum, and Todd Energy all carry out fracking in Taranaki.
However, industry bodies say there is as much risk of a fracking disaster in New Zealand as of the Auckland Harbour Bridge falling down, and the process is regarded as a manageable and safe one.
However, Labour MP Stuart Nash says the findings are “alarming” and let slip that fracking will come up as part of Labour’s environmental policy, due to be released on Sunday.
3 News