US government scientists link sharp rise in earthquakes to fracking.

Business Green: “A sharp rise in the number of earthquakes in the US over the past few years is almost certainly caused by human activity and could be linked to a boom in shale gas drilling. That is the stark finding of a report by the US government’s Geological Survey, due to be launched in full at a conference next week. / The report, produced by a team led by scientist Bill Ellsworth, set out to discover what has caused a six-fold increase in earthquakes in the midcontinent. / Average annual earthquakes rates with a magnitude three or greater jumped from 21 in the three decades before 2000, to 50 in 2009, 87 in 2010 and 134 in 2011.”