This video from the USA says about itself:
4 September 2016
Five months before Saturday’s 5.6 magnitude temblor in central Oklahoma, government scientists warned that oil and natural gas drilling had made a wide swath of the country more susceptible to earthquakes: here.
Wastewater cap could dunk Oklahoma quake risk. Rising volume of underground injections had caused seismic activity to skyrocket. By Thomas Sumner, 2:36pm, November 30, 2016: here.