OKLA and other quakes - many caused by oil drilling

[Yowbarb]

Yowbarb Note: This excerpt is from a BBC article I saw just now. Posted 2 hours ago.
5.0 earthquake shakes central Oklahoma.

"In 2013, scientists linked the underground injection of oil drilling wastewater to a magnitude-5.7 earthquake that struck Oklahoma in 2011.
Cushing, which has a population of about 7,900, is home to one of the largest oil storage facilities in the US." 

http://www.bbc.com/news/science-environment-21952428

Oklahoma earthquake linked to oil extraction wastewater
By Jason Palmer
Science and technology reporter, BBC News
27 March 2013
 From the section Science & Environment