“Green” geothermal and hydroelectric projects linked to more earthquakes than fracking

Fracking has also been linked to a “swarm” of 50 small earthquakes in Oklahoma on Jan 18, 2011, ranging in magnitude from 1.0 to 2.8, which occurred at the same time as the fracking of a well in the Eola Oil Field.

But these are the only two confirmed cases where induced seismic activity has been linked to fracking. Far more seismic events have been traced to conventional oil and gas extraction (38), secondary oil recovery through waterflooding (27), geothermal energy (25), waste water injection (11) and hydroelectric reservoirs (44).