Fracking tests near Blackpool 'likely cause' of tremors
It is "highly probable" that shale gas test drilling triggered earth tremors in Lancashire, a study has found.
But the report, commissioned by energy firm Cuadrilla, also said the quakes were due to an "unusual combination of geology at the well site".
It said conditions which caused the minor earthquakes were "unlikely to occur again".
Anti-fracking activists who have climbed a rig near Southport in protest said it "did not inspire confidence".
Four protesters from
campaign group Frack Off have climbed the drilling rig at one of the test drilling sites in Hesketh Bank.
The group is against fracking ... [
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