If you happen to be an oil and gas operator ready to frac your well in Scotland, you could get an official notice from the UK Department of Energy and Climate Change that would make you scratch your head.

Seismic restrictions were initiated after two small tremors were felt near Blackpool, Lancashire, after fracturing operations at a shale gas drilling site. The restrictions shut down operations which cause surface vibrations greater than magnitude 0.5 on the Richter scale, the Scotsman reported.

Dr. Rob Westaway and Professor Paul Younge...

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